KINDAI UNIVERSITY


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KURODA Takayoshi

Profile

FacultyDepartment of Science / Graduate School of Science and Engineering Research / Research Institute for Science and Technology
PositionProfessor
Degree
Commentator Guidehttps://www.kindai.ac.jp/meikan/324-kuroda-takayoshi.html
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Last Updated :2020/07/08

Education and Career

Education

  •  - 1985 , Kyoto University
  •  - 1985 , Kyoto University, Graduate School, Division of Engineering
  •  - 1980 , Kyoto University, Faculty of Engineering
  •  - 1980 , Kyoto University, Faculty of Engineering

Academic & Professional Experience

  •   2008 04 ,  - 現在, Professor, Department of Chemistry, Faculty of Science and Engineering, Kinki University
  •   2000 ,  - 2006 , Kindai University
  •   1995 ,  - 2000 , Kindai University
  •   1993 ,  - 1995 , Kindai University
  •   1985 ,  - 1993 , Hitachi, Ltd.,
  •   1995 ,  - 2000 , Kinki University, Lecturer
  •   1993 ,  - 1995 , Kinki University, Research Assistant
  •   1985 ,  - 1993 , Hitachi Ltd., Researcher

Research Activities

Research Areas

  • Nanotechnology/Materials, Functional solid-state chemistry
  • Nanotechnology/Materials, Inorganic and coordination chemistry

Research Interests

  • Molecular Magnetism, Structural Coordination Chemistry

Published Papers

  • Crystal structure of a dinuclear Co complex with doubly bridged fluorides: di-μ-fluoride-bis{(2-pyridylmethyl)bis(2-quinolylmethyl)}amine dicobalt(II) bis (tetrafluoroborate), [Co2(μ-F)2(pbqa)2](BF4)2, Y. Suenaga, T. Mibu, T. Okubo, M. Maekawa, T. Kuroda-Sowa, X-ray Struct. Anal. Online, X-ray Struct. Anal. Online, 2019 , Refereed
    Summary:in press
  • Syntheses, structure and properties of di-nuclear Co complexes with bis(catecholate) ligands-effect of a quinoline ring in the terminal group, Y. Suenaga, T. Mibu, T. Okubo, M. Maekawa, T. Kuroda-Sowa, Polyhedron, Polyhedron, 171, 480 - 485, 2019 , Refereed
  • Self-assembly of Cu(I) metallomacrocycle and coordination polymers with 2,2':5',4''-terpyridine directed by anions and solvents, M. Maekawa, T. Hayashi, K. Sugimoto, T. Okubo, T. Kuroda-Sowa, Inorg. Chim. Acta, Inorg. Chim. Acta, 2019 , Refereed
    Summary:in press
  • A New Semiconducting 1D Cu(I)-Cu(II) Mixed-Valence Coordination Polymer with Cu(II) Dimethylpiperidine-dithiocarbamate and a Tetranuclear Cu(I)-Br Cluster Unit, K. Himoto, S. Suzuki, T. Okubo, M. Maekawa, T. Kuroda-Sowa, New J. Chem., New J. Chem., 42, 3995 - 3998, 2018 , Refereed
  • Crystal Structure and Bandgap Engineering of a Semiconducting Coordination Polymer consisting of Copper(I)-Bromide and a Bridging Acceptor Ligand, T. Okubo, K. Himoto, K. Tanishima, S. Fukuda, Y. Noda, M. Nakayama, K. Sugimoto, M. Maekawa, T. Kuroda-Sowa, Inorg. Chem., Inorg. Chem., 57, 2373 - 2376, 2018 , Refereed
  • Controlled self-assembly of a 2-D sheet coordination polymer and monomer containing an eight-membered Cu4I4 crown motif, K. Sugimoto, H. Takaya, M. Maekawa, T. Kuroda-Sowa, Cryst. Growth Des., Cryst. Growth Des., 18, 571 - 575, 2018 , Refereed
  • Crystal structure of a new mixed-metal coordination polymer consisting of Ni(II) piperidine-dithiocarbamate and pentanuclear Cu(I)-I cluster units, K. Himoto, T. Horii, S. Oda, S. Suzuki, K. Sugimoto, T. Okubo, M. Maekawa, T. Kuroda-Sowa, Acta Cryst., Acta Cryst., E74, 233 - 236, 2018 , Refereed
  • A new semiconducting coordination polymer consisting of copper(I)-iodide and 3-pyridinecarboxaldehyde, K. Himoto, T. Horii, T. Syoji, T. Okubo, M. Maekawa, T. Kuroda-Sowa, Inorg. Chem. Comm., Inorg. Chem. Comm., 88, 34 - 37, 2018 , Refereed
  • Structurally Diverse Polynuclear Copper(I) Complexes Bridged by Pyrimidine-, Pyrazine-, and Triazine-based Ligands with Several 2-Pyridyl Groups, Masahiko Maekawa, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, CHEMISTRYSELECT, CHEMISTRYSELECT, 1(13), 3812 - 3822, Aug. 2016 , Refereed
    Summary:The reactions of [Cu(MeCN)(4)]BF4 or [Cu(C2H4)(n)]ClO4 complexes with 4,6-bis(2-pyridyl)pyrimidine (bppym) in Me2CO under C2H4 afforded dinuclear Cu(I)-bppym/C2H4 adducts [Cu-2-(bppym)(C2H4)2](BF4)(2)center dot Me2CO (1) and [Cu-2(bppym)(2)(C2H4)(2)](ClO4)(2)center dot Me2CO (2), respectively. One Cu(I) atom is coordinated by bppym and C2H4 in a distorted trigonal-planar geometry. The other Cu(I) atom is coordinated by bppym, Me2CO, and C2H4 toward a distorted tetrahedral geometry. The reaction of [Cu(MeCN)(4)]BF4 with 2,3-bis(2-pyridyl)pyrazine (bppz) in MeOH under C2H4 afforded a Cu(I)-bppz coordination polymer {[Cu-2(bppz)(2)](BF4)(2)center dot MeOH} n (3). Two Cu(I) atoms are alternately bridged by two bppz to form a 1-D zigzag-chain structure. Each Cu(I) coordination sphere is largely distorted from a normal tetrahedral structure toward a square planar structure. The reaction of [Cu(MeCN)(4)]PF6 with 2,4,6-tris(2-pyridyl)-s-triazine (tptz) in MeEtCO under C2H4 afforded a tetranuclear Cu(I)-tptz/C2H4 adduct [Cu-4(tptz)(2)(C2H4)(2)(MeCN)(2)](PF6)(4)center dot MeEtCO (4b). Two Cu(I) atoms are bridged by the central triazine ring, the 2-pyridyl group, the central triazine ring, and the 2-pyridyl group in a different tptz to form a double helical structure. The other Cu(I) atom is coordinated by the central triazine ring, the 2-pyridyl group, MeCN, and C2H4 in a distorted tetrahedral geometry. The reaction of [Cu(MeCN)(4)]PF6 with tetra-2-pyridylpyrazine (tppz) in MeOH under C2H4 afforded a tetranuclear Cu(I)-tppz complex [Cu-4(tppz)(2)(MeCN)(4)](PF6)(4)center dot MeOH (5a). Each Cu(I) atom is coordinated by the central pyrazine ring, the 2-pyridyl group, the 2-pyridyl group in a different tppz, and MeCN in a distorted tetrahedral geometry. These four Cu(I) atoms are bridged by the two opposite tppz ligands to form a unique tetranuclear Cu(I) cage structure.
  • Heterometallic Ag-I-Ir-III Hydride Coordination Polymers Bridged by Ir-III Metalloligands, Masahiko Maekawa, Yukimi Kubo, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2016(1), 78 - 91, Jan. 2016 , Refereed
    Summary:A new type of Ir-III metalloligands containing an unsaturated nitrogen coordination site, [Ir(H)(2)(PPh3)(2)(pprd)]BF(4)2CHCl(3) (1), [Ir(H)(2)(PPh3)(2)(Me(2)bpm)]BF4CHCl3 (2), {[Ir(H)(2)(PPh3)(2)(Me(2)bpm)]PF6CHCl3}(4) (3), [Ir(H)(2)(PPh3)(2)(biqz)]BF(4)2CHCl(3) (4), and [Ir(H)(2)(PPh3)(2)(biqz)]PF6 (5), have been prepared by reaction of [Ir(H)(2)(PPh3)(2)(Me2CO)(2)]X (X = BF4 or PF6) with 4-(2-pyridyl)pyrimidine (pprd), 6,6-dimethyl-4,4-bipyrimidine (Me(2)bpm), or 4,4-biquinazoline (biqz). Subsequently, three novel heterometallic Ag-I-Ir-III hydride coordination polymers, {[Ir(H)(2)(-pprd)(PPh3)(2)Ag(-CF3COO)]BF4Me2CO}(n) (6), {[Ir(H)(2)(-biqz)(PPh3)(2)Ag-2(-CF3COO)(3)]Me2CO}(n) (7), and {[Ir(H)(2)(-Me(2)bpm)(PPh3)(2)Ag-2(-CF3COO)(2)]PF(6)2Me(2)CO}(n) (8) have been constructed by reaction of the Ir-III metalloligands 1, 3, and 5 with AgCF3COO. In coordination polymer 6, the [Ir(H)(2)(PPh3)(2)(pprd)](3+) units are linked through the Ag-I atoms to form a 1D zigzag chain structure. In coordination polymer 7, the dinuclear [Ag-2(-CF3COO)(3)](-) units are linked through the terminal N atoms of biqz in two different [Ir(H)(2)(PPh3)(2)(biqz)](3+) units to form a 1D zigzag chain structure. In coordination polymer 8, the [Ag-2(-CF3COO)(2)] frameworks are linked through the terminal N atoms of Me(2)bpm and the Ir-III atom in two different [Ir(H)(2)(PPh3)(2)(Me(2)bpm)](3+) units to form a waved rectangular cavity. These waved rectangular cavities are connected to each other to afford a unique 2D sheet structure.
  • Dinuclear and polymeric copper(I) ethylene adducts bridged by bis-pyridyl derivatives of 1,2,4-triazole and 1,2,3,4-tetrazine,, M. Maekawa, K. Sugimoto, T. Okubo, T. Kuroda-Sowa, M. Munakata, Inorg. Chim. Acta,, Inorg. Chim. Acta,, 426, 64 - 70, 2015 , Refereed
  • The first copper(I) coordination polymers self-assembled by 4,4 '-biquinazoline, Masahiko Maekawa, Ai Minamino, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 414, 257 - 263, Apr. 2014 , Refereed
    Summary:The reactions of [Cu(MeCN)(4)](X) (X = BF4 or PF6) with 4,4'-biquinazoline (biqz) in MeOH under C2H4 afforded brown plate crystals of {[Cu-4(biqz)(2)(MeCN)(4)(MeOH)(4)](BF4)(4)}(n) (1) and orange prismatic crystals of {[Cu-4(biqz)(2)(MeCN)(8)](PF6)(4)}(n) (2), respectively. In both of complexes 1 and 2, two Cu(I) atoms are bridged by two biqz ligands to form a 14-membered Cu4C6N4 framework. Furthermore, the Cu4C6N4 frameworks are linked by the two chelate and bridging sites of biqz to generate a 1-D double-chain Cu(I) coordination polymer. It should be noted that two N atoms in the chelate site of the biqz ligand does not act as a normal bidentate chelate mode but form a bridge between two Cu atoms in an unidentate bridging mode. In contrast, the reaction of [Cu(C2H4)(n)]ClO4 with biqz in Me2CO under C2H4 afforded orange plate crystals of polymeric Cu(I)-biqz/C2H4 adduct {[Cu-2(biqz)(C2H4)(2)](ClO4)(2)center dot Me2CO}(n) (3). The Cu atom is coordinated by two N atoms of biqz in the chelate site and the C=C bond of C2H4 in a rather distorted trigonal-planar geometry. The other Cu atom is coordinated by two N atom of two biqz ligands in the exo bridging site and the C=C bond of C2H4 in a trigonal-planar geometry to form a 1-D zigzag-chain structure. It was proved that the Cu(I) coordination polymers bridged by the biqz ligand in the different coordination modes can be preferentially produced by the choices of the precursor Cu(I) complexes. The thermogravimetric analysis (TG-DTA) measurements showed that Cu(I)-biqz-{BF4, PF6} complexes 1 and 2 were thermochemically stable to a relatively high temperature (330-340 degrees C). (C) 2014 Elsevier B. V. All rights reserved.
  • Crystal structure of a dinuclear Co complex with doubly bridged fluoride and peroxo ligands: μ-fluoro μ-peroxo bis{tris(2-pyridylmethyl)amine}dicobalt(III) tris(tetrafluoroborate), [Co2(μ-F)(μ-O2)(tpa)2](BF4)3,, Y. Suenaga, M. Inomata, K. Uwai, K. Okuda, T. Okubo, M. Maekawa, T. Kuroda-Sowa, X-ray Struct. Anal. Online, X-ray Struct. Anal. Online, 30, 56 - 57, 2014 , Refereed
  • Conductance with stochastic resonance in Mn12 redox network without tuning, Yoshiaki Hirano, Yuji Segawa, Takayoshi Kuroda-Sowa, Tomoji Kawai, Takuya Matsumoto, Appl. Phys. Lett., Appl. Phys. Lett., 104, 233104, 2014 , Refereed
  • Novel Cu-I Ethylene Complexes with 6,6 '-Diphenyl-4,4 '-bipyrimidine Three-Dimensionally Self-Assembled by an Intermolecular pi-pi Stacking Interaction and a C-H center dot center dot center dot N Contact, Masahiko Maekawa, Toshi Tominaga, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, (28), 4225 - 4231, Oct. 2009 , Refereed
    Summary:Four novel Cu-I-Ph(2)bpm/C2H4 adducts [Cu(Ph(2)bpm)(C2H4)]X [X = BF4 (1a, 1b), ClO4 (2) and PF6 (3); Ph(2)bpm = 6,6'-diphenyl-4,4'-bipyrimidine] were prepared and they have been characterized by X-ray, H-1 NMR, IR and TG-DTA analyses. The molecular structures of Cu-I-Ph(2)bpm/C2H4 complexes la, 1b, 2 and 3 are essentially similar: the Cu atom is coordinated by two N atoms in the chelate site of Ph(2)bpm and the C=C bond of C2H4 in the trigonal-planar geometry. Interestingly, their crystal packing structures are much different from the connection manners of an intermolecular pi-pi stacking interaction and a C-H center dot center dot center dot N contact, resulting in the self-assembly of Cu-I-C2H4 adducts with a unique three-dimensional network structure. The X-ray, H-1 NMR, IR data support the assumption that the contribution of the larger Cu-I -> C2H4 pi back-donation bonding is induced by the electron-releasing phenyl group. ((C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
  • Effects of Metal Doping on the Spin-Crossover Properties of an Iron(II) Complex with Extended pi-Conjugated Schiff-Base Ligand Having an N4O2 Donor Set, Zhong Yu, Takayoshi Kuroda-Sowa, Hiroaki Kume, Takashi Okubo, Masahiko Maekawa, Megumu Munakata, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 82(3), 333 - 337, Mar. 2009
    Summary:The spin-crossover (SCO) complex [Fe(qnal)(2)]center dot CH2Cl2 (1), (Hqnal: N-(8'-quinolyl)-2-hydroxy-1-naphthaldimine) with an N4O2 donor set, has been synthesized and characterized. Investigation of magnetic properties shows that the complex exhibits an abrupt and complete spin transition with a 5 K wide thermal hysteresis loop. The X-ray diffraction analysis of complex 1 reveals that the molecules are connected into a quasi one-dimensional chain through extended pi-pi interactions between aromatic rings of ligands. The effects of metal doping on SCO properties have been investigated in the mixed-metal system [Fe1-xMx(qnal)(2)]center dot CH2Cl2 (M = zinc(II) and nickel(II)). The results reveal that metal doping increases the gradual character of spin transition, and no marked differences found between zinc and nickel doping, which suggest the dominant effect of the doping-degree (concentration) rather than metal species on cooperativity. However, the metal doping shows different effects on critical temperature (T-1/2), where a more pronounced descending of T-1/2 is observed in response to increased Zn-doping than in Ni-doping, indicating the noticeable consequence of internal pressure due to the different radii of doping metal ions.
  • {6,6'-Dimethoxy-2,2'-[naphthalene-2,3-diylbis(nitrilomethylidyne)]diphenolato}thiocyanatocobalt(III) diethyl ether dichloromethane solvate, Acta Crystallographica, Acta Crystallographica, E65, m257 - m258, Feb. 2009
  • Abrupt Spin Transitions and LIESST Effects Observed in Fe-II Spin-crossover Complexes with Extended pi-Conjugated Schiff-base Ligands Having N4O2 Donor Sets, Takayoshi Kuroda-Sowa, Zhong Yu, Yuka Senzaki, Kunihisa Sugimoto, Masahiko Maekawa, Megumu Munakata, Shinya Hayami, Yonezo Maeda, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 37(12), 1216 - 1217, Dec. 2008
    Summary:Novel Fe-II complexes with N4O2 donor sets having, extended pi-conjugated aromatic rings, [Fe(qnal)(2)]center dot CH2Cl2 and [Fe(qnal)21, show abrupt spin transitions at 220 and 265 K, respectively. Both complexes show LIESST effects below 80 K.
  • Cobalt(II) and cobalt(III) complexes with 4-4′ -(4-cyanophenyl)-2,2′:6′,2′′ -terpyridine, Acta Crystallographica, Acta Crystallographica, C64, m209 - m212, Apr. 2008
  • Syntheses and structural characterization of mononuclear Rh-Cp* and Ir-Cp* complexes with eta(6)-phenanthrene, eta(6)-pyrene and eta(6)-triphenylene, M Maekawa, T Minematsu, A Nabei, H Konaka, T Kuroda-Sowa, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 359(1), 168 - 182, Jan. 2006
    Summary:Four novel mononuclear Rh-Cp* and Ir-Cp* complexes with polycyclic aromatic hydrocarbons (PAHs), [M(Cp*)(eta(6-)PAHs)](BF4)(2)(M= Rh and Ir; Cp* = eta(5)-C5Me5; PAHs = phenanthrene (phn), pyrene (pyr) and triphenylene (triph)), were prepared by the reactions of the intermediate [M(Cp*)(Me2CO)(3)](2+) with appreciable PAHs. Their structures were characterized by a single crystal X-ray analysis, H-1, C-13 {H-1} NMR and 2D NMR techniques. The X-ray crystallographic studies showed that the [M(Cp*)](2+) fragment is eta(6-)coordinated to one terminal benzene ring in each PAH. In particular, it is interesting to note that the partial pi/pi/pi/pi interaction was formed in the Ir-pyr complex [Ir(Cp*)(eta(6)-pyr)](BF4)(2). The 1D and 2D NMR studies described that the Rh-Cp* and Ir-Cp* complexes with PAHs gave unique H-1 and 13C [ 1 H I NMR spectra with positive coordination shifts (Delta delta(H-1, C-13) in (CD3)(2)CO at 23 degrees C, which are likely induced by the local effect and the non-local effect on the coordination of the [M(Cp*)]2+ fragment to PAHs. The decreasing of the coupling constants ((3)J(H-H)) in the eta(6)-Coordinated benzene ring is also induced, with no changes in the uncoordinated benzene rings. The time-course of 1H NMR spectra showed that Rh-Cp* and Ir-Cp* complexes with PAHs are partially dissociated to [M(Cp*)(Me2CO)(3)](2+) and metal-free PAHs in (CD3)2CO at 23 degrees C. It was demonstrated that their stabilities are in the order of Ir-triph, Ir-phn, Ir-pyr and Rh-triph complexes in (CD3)(2)CO. (c) 2005 Elsevier B.V. All rights reserved.
  • Synthesis and crystal structures of silver(I) bridged tetra-phenyl-pyrylium complexes from tetraphenyl-cyclopentadiene, GL Ning, XC Li, WT Gong, M Munakata, M Maekawa, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 358(7), 2355 - 2362, Apr. 2005
    Summary:Reactions of silver(1) perchlorate with tetraphenyl-cyclopentadiene (Ph4H2-C-5) have isolated two novel silver(1) bridged tetraphenyl-pyrylium complexes: [Ag(ClO4)(Ph4HC5O+)](ClO4)(-) (1) and [Ag(ClO4)(H2O)(Ph4HC5O+)](ClO4-) (2), depending on moisture-content of the reactants. Structure studies using single-crystal X-ray diffraction have showed that complex 1contains a distorted tetrahedral metal center bridging two neighboring peripheral phenyl rings of one pyrylium cation and two perchlorate anions, whereas 2 involves a three-coordinate metal ion interacting with a pair of phenyl rings and one water molecule, leaving two perchlorate anions free from coordination. For both complexes, the precursor ligand Ph4H2C5 undergoes a ring-enlargement reaction, forming a six-membered pyrylium cation. The fundamentals of the synthesis, structure characterization and some properties are discussed. (c) 2005 Elsevier B.V. All rights reserved.
  • Synthesis and structural characterization of dinuclear iridium hydrido complex with 3,6-bis(2-pyridyl)tetrazine, [Ir-2(H)(4)(PPh3)(4)(bptz)](PF6)(2) center dot 4CH(2)O(2), M Maekawa, H Konaka, T Minematsu, T Kurorda-Sowa, Y Suenaga, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 358(4), 1317 - 1321, Mar. 2005 , Refereed
    Summary:Reaction of the precursor Ir complex [Ir(H)(2)(PPh3)(2)(Me2CO)(2)]PF6 with 3,6-bis(2-pyridyl)tetrazine (bptz) in CH2Cl2 gave a novel dinuclear Ir hydrido complex [Ir-2(H)(4)(PPh3)(4)(bptz)](PF6)(2) center dot 4CH(2)Cl(2). Crystallographic study described an interesting coordination environment having a pi-pi interaction and H-1 NMR study showed unique uptield shifts of pyridyl rings that are likely induced by the ring current effect of neighboring PPh3 ligands. (c) 2004 Elsevier B.V. All rights reserved.
  • First crystallographic determination of dichloro-bridged dinuclear rhodium Cp* complex with neutral Me2CO molecules. [Rh-2(Cp*)(2)(mu-Cl)(2)(Me2CO)(2)](BF4)(2) (Cp* = eta(5)-C5Me5), M Maekawa, Y Kayanuma, A Nabei, T Kuroda-Sowa, Y Suenaga, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 358(4), 1313 - 1316, Mar. 2005 , Refereed
    Summary:The single crystals 5 of dichloro-bridged dinuclear Rh-Cp* complex with neutral Me2CO molecules, [Rh-2(CP*)(2)(mu-Cl)(2)(Me-2-CO)(2)](BF4)(2) (CP* = eta(5)-C5Me5), was isolated and the structure was in first determined crystallographically. (c) 2004 Elsevier B.V. All rights reserved.
  • catena-poly[[chlorodipyridine-manganese(II)]-mu(3)-6-oxo-1,6-dihydro-pyridine-2-carboxylato], GQ Bian, T Kuroda-Sowa, S Sugimoto, M Maekawa, M Munakata, ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 61, M144 - M146, Mar. 2005 , Refereed
    Summary:The title one-dimensional chain polymer complex, [Mn(C6H4NO3)Cl(C6H5N)(2)](n), was isolated from the reaction of MnCl2 with 6-oxo-1,6-dihydropyridine-2-carboxylic acid (HpicOH) in pyridine. The asymmetric unit contains one [Mn(HPicO)Cl(py)(2)] moiety (py is pyridine), with the (HpicO)(-) ligand acting in a tridentate manner via the two carboxylate O atoms and the pyridone O atom. The operation of inversion centres generates eight- and 14-membered rings and, in conjunction with an a-axis translation, leads to an infinite chain extending along [100]. The Mn...Mn separations in this chain are 5.1069 (6) and 7.1869 (6) Angstrom. The Mn-II atom has a distorted octahedral coordination, with trans-axial pyridine ligands and with three O atoms and the Cl atom in the equatorial plane. The conformation of the 14-membered ring is stabilized by pairs of inversion-related N-H...O hydrogen bonds.
  • Silver(I) coordination polymers of fluorescent oligo(phenylenevinylene) with π−π stackings: luminescence and conductivity "jointly worked", Inorg. Chem., Inorg. Chem., 44, 1031 - 1036., 2005 , Refereed
  • MeOH-Coordinated Mn12 Single-Molecule Magnet: Structure and Magnetic Properties of [Mn12O12(OAc)16(MeOH)4] "jointly worked", Inorg. Chem, Commun, Inorg. Chem, Commun, 8, 205 - 211, 2005 , Refereed
  • Dinuclear silver(I) complexes of N,N '-dibenzyl-4,13-diaza-18-crown-6-ether and dibenzo-24-crown-8-ether, M Wen, M Munakata, Y Suenaga, T Kuroda-Sowa, M Maekawa, Kodai, I, POLYHEDRON, POLYHEDRON, 23(13), 2117 - 2123, Aug. 2004
    Summary:Three silver(I) coordination complexes of diaza- and dibenzo-crown ethers, [Ag(DDAc)](CF3SO3) (1), [Ag-2(DDAC)(CF3SO3)(2)] (2) and [Ag-2(DB24C8)(CF3SO3)(2)] (3) have been synthesized by using different molar ratios of ligand to silver triflate salt, and characterized structurally. A large excess of DDAC ligand leads to mononuclear complex 1, and a large excess of silver triflate gives rise to dinuclear complex 2, based on metal-heteroatom and metal-oxygen interactions. Ligand DB24C8 coordinates two silver(I) ions to afford dinuclear complex 3. (C) 2004 Elsevier Ltd. All rights reserved.
  • catena-Poly[[[diacetonitrilesilver(I)]- μ-2,11,dithia[3,3]paracyclophane-κ2S:S’]-(tetrafluoroterephthalate(tetrafluoroterephthalic acid))acetonitrile tetrasolvate] "jointly worked", Acta Crystallographica, Acta Crystallographica, E60, m1504 - m1506, 2004 , Refereed
  • Syntheses and structural characterizations of novel mono and dinuclear iridium hydrido complexes with polydentate nitrogen donor ligands. es of the first iridium complexes with m- and p-terpehnyl (tp). {[Ir2(p-tp)(cod)2](BF4<・・・, Inorganica Chimica Acta,, Inorganica Chimica Acta,, 357, 3456 - 3472, 2004 , Refereed
    Summary:Syntheses and structural characterizations of novel mono and dinuclear iridium hydrido complexes with polydentate nitrogen donor ligands. es of the first iridium complexes with m- and p-terpehnyl (tp). {[Ir<sub>2</sub>(p-tp)(cod)<sub>2</sub>](BF<sub>4</sub>)<sub>2</sub>•2CH<sub>2</sub>Cl<sub>2</sub>}<sub>3</sub> and [Ir<sub>2</sub>(μ-tp)(η5-C<sub>5</sub>Me<sub>5</sub>)](BF<sub>4</sub>)<sub>2</sub> "jointly worked"
  • Bis(μ-6-hydroxypicolinato)-μ-oxo-bis[dipyridinemanganese(III)] monohydrate "jointly worked", Acta Crystallogr. Sect C, Acta Crystallogr. Sect C, C60, m338 - m340, 2004 , Refereed
  • catena-Poly[[[diacetonitrilesilver(I)]- μ-2,11,dithia[3,3] paracyclophane-κ2S:S’]hydrogenoctafluoroadipate] "jointly worked", Acta Crystallogr. Sect E, Acta Crystallogr. Sect E, E60, m865-m867, 2004
  • Crystal Structure of Chlorobis(1,10-phenanthroline)copper(II) Tetrafluoroborate, [Cu(phen)2Cl]BF4 "jointly worked", Analytical Sciences, Analytical Sciences, 20, x71-x72, 2004
  • A novel Mn12 Single-Molecule Magnet with a μ3-methanesulfonate bridge "jointly worked", Chemistry Letters, Chemistry Letters, 33, 540-541, 2004 , Refereed
  • Syntheses and crystal structures of the first iridium complexes with m- and p-terphenyl (tp). {[Ir-2(p-tp)(cod)(2)](BF4)(2) center dot 2CH(2)Cl(2)}(3) and [Ir(m-tp)(eta(5)-C5Me5)](BF4)(2), M Maekawa, Y Suenaga, T Kuroda-Sowa, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 357(1), 331 - 338, Jan. 2004 , Refereed
    Summary:Novel two iridium terphenyl complexes were prepared and their structures were characterized crystallographically. The reaction of [Ir(cod)(2)]BF4 with p-terphenyl (p-tp) in CH2C2, was carried out to afford dinuclear Ir(I) complex {[Ir-2(p-tp)(cod)(2)](BF4)(2) (.) 2CH(2)Cl(2)}(3) (cod = 1, 5-cyclooctadiene) (1 (.) 2CH(2)Cl(2)), whereas the reaction of the intermediate [Ir(eta(5)-C5Me5)(MeCO)(3)](3+) in Me2CO with m-terphenyl (m-tp) was done to provide mononuclear Ir(III) complex [Ir(m-tp)(eta(5)-C5Me5)](BF4)(2) (2). In complex 1 (.) 2CH(2)Cl(2) two Ir atoms are eta(6)-coordinated to both sides of terminal benzene rings from the upper and lower sides in the p-tp ligand, while one Ir atom is eta(6)-coordinated to one side of the terminal benzene ring in the m-tp ligand in complex 2. Each crystal structure describes the first coordination mode found in metal complexes with the m- and p-tp ligands. (C) 2003 Elsevier B.V. All rights reserved.
  • Crystal Structure of Tri- μ-chloro-bis-(1,2,3,4,5-η)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl)]- diiridium tetrafluoroborate with a unique trigonalbipyramidal Ir2Cl3 core, [Ir2(Cp*)2(μ-Cl)3]BF・・・, Analytical Sciences, Analytical Sciences, 20, x11-x12, 2004 , Refereed
    Summary:Crystal Structure of Tri- μ-chloro-bis-(1,2,3,4,5-η)-1,2,3,4,5-pentamethyl-2,4-cyclopentadien-1-yl)]-
    diiridium tetrafluoroborate with a unique trigonalbipyramidal Ir<sub>2</sub>Cl<sub>3</sub> core, [Ir<sub>2</sub>(Cp*)<sub>2</sub>(μ-Cl)<sub>3</sub>]BF<sub>4</sub> (Cp* = η5-C<sub>5</sub>Me<sub>5</sub>) "jointly worked"
  • Synthesis, crystal structure and magnetic properties of novel Mn-12 single-molecule magnets with thiophenecarboxylate, [Mn12O12(O2CC4H3S)(16)(H2O)(4)], and its tetraphenylphosphonium salt, T Kuroda-Sowa, T Nogami, H Konaka, M Maekawa, M Munakata, H Miyasaka, M Yamashita, POLYHEDRON, POLYHEDRON, 22(14-17), 1795 - 1801, Jul. 2003 , Refereed
    Summary:The preparation and physical characterization are reported for novel Mn-12 single-molecule magnets having thiophenecarboxylate bridges, [Mn12O12(O2CC4H3S)(16)(H2O)(4)] (1), and its PPh4 salt (2). The reaction of the excess amount of 2-thiophenecarboxylic acid (tpcH) and [Mn12O12(OAc)(16)(H2O)(4)] in CH2Cl2 gave black crystals of 1, which could be reduced by PPh4I to give 2. From the crystal structure analysis of 2, it is revealed that there are two five-coordinated Mn ions, one of which is assigned to a Mn-II ion being in the vicinity of the tetraphenylphosphoniurn cation. Both complexes exhibit out-of-phase a.c. magnetic susceptibility (chi(M)'') signals in the 5.0-6.5 K range at 997 Hz a.c. frequency, which indicate that they are single-molecule magnets. From Arrhenius plots of the frequency dependence of the temperature of the chi(M)'' peaks, the effective energy barriers U-eff were estimated to be 69 and 57 K for high-temperature phases of 1 and 2, respectively, and 40 K for the low-temperature phase of 1. The reduced magnetization measurement and its analysis indicate that 2 has S = 19/2 ground state with g = 1.99 and D = -0.61 K. (C) 2003 Elsevier Science Ltd. All rights reserved.
  • Construction of the multidecker anthracene-silver(I) system by intramolecular pi-pi interactions, M Munakata, LP Wu, T Kuroda-Sowa, M Maekawa, Y Suenaga, T Ohta, H Konaka, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 42(8), 2553 - 2558, Apr. 2003 , Refereed
    Summary:As a continuation of the study on the construction of the multidecker aromatic compounds with pi-pi interactions, the anthracene derivatives 9,10-dimethylanthracene (dman), 9,10-diphenylanthracene (dpan), and 7,12-dimethylbenz[a]anthracene (dmban) have been studied toward complexation with the silver(l) ion. The crystal structures of [Ag(dman)(0.5)(p-xylene)(ClO4)], [Ag-2(dpan)(0.5)(C6H6)(0.5)(CF3SO3)(2)], and [Ag-2(dmban)(2)(ClO4)(2)](p-xylene), together with the metal-free ligand dpan, have been determined by single-crystal X-ray diffraction. These pi-electron-rich aromatic compounds are found to have great promise as an approach to the effective! self-assembly of high nuclearity in a multilayer fashion.
  • Thermal transition behavior and crystal structure of octakis(phenylsulfanyl)naphthalene "jointly worked", Thermochimica Acta, Thermochimica Acta, 400(1/2), 87 - 94, 2003 , Refereed
  • Syntheses and structural characterization of [2.2]paracyclophane complexes of rhodium and iridium supported by diene ligands "jointly worked", Inorganica Chimica Acta, Inorganica Chimica Acta, 344, 143 - 157, 2003 , Refereed
  • Syntheses and structural studies on silver(I) coordination polymers with trans, trans-1,4-diphenyl-1,3-butadiene "jointly worked", Inorganica Chimica Acta, Inorganica Chimica Acta, 342, 202 - 208, 2003 , Refereed
  • Porous silver(I) organometallic coordination polymer of triptycene, and the guest desorption and adsorption "jointly worked", Inorganica Chimica Acta,, Inorganica Chimica Acta,, 340, 8 - 14, 2002 , Refereed
  • Dinuclear silver(I) complexes of dibenzo-crown ethers and the mononuclear complex of aminobenzo-crown ether "jointly worked", Inorganica Chimica Acta,, Inorganica Chimica Acta,, 338, 111 - 118, 2002 , Refereed
  • Single-molecule magnets: Magnetic properties of [Mn-12] complexes with sulfer-containing carboxylates, T Kuroda-Sowa, T Nogami, M Maekawa, M Munakata, MOLECULAR CRYSTALS AND LIQUID CRYSTALS, MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 379, 179 - 184, 2002 , Refereed
    Summary:Magnetic properties of [Mn-12] complexes with sulfer-containing carboxylates, [Mn12O12(tha)(16)(H2O)(4)] (2) and [Mn12O12(tpc)(16)(H2O)(4)] (3) (thaH = trans-3-(3-thienyl)acrylic acid,. tpcH = 2-thiophenecarboxylic acid), are investigated. Both complexes showed frequency-dependent out-of-phase signals in ac susceptibility, indicating they are single-molecule magnets (SMMs). The energy barrier heights for reversing its magnetization from spin "up" to spin "down" are estimated to be 67 K and 68K for 2 and 3., respectively.
  • Crystal Structure of 1:1 Donor-Acceptor Complex between 9,10-Benzophenanthrene and 2,3,5,6-Tetrafluoro-1,4-benzoquinone(共著), Analytical Sciences, Analytical Sciences, 18, 851-852, 2002
  • Silver(I) complexes of dibenzo-18-crown-6-ether having cation-π and π-π interactions(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 332, 18-24, 2002
  • A Chemical Modification of a Mn12 Single-Molecule Magnet by Replacing Carboxylate Anions with Diphenylphosphate Anion(共著), Chem. Lett., Chem. Lett., 682-683, 2002
  • Field-tuned Tunneling in [Fe(C5Me5)2][Mn12O12(O2CC6F5)16(H2O)4] Studied by AC Magnetic Susceptibility(共著), Mol. Cryst. Liq. Cryst., Mol. Cryst. Liq. Cryst., 376, 483-488, 2002
  • Syntheses and crystal structures of mononuclear [2.2]paracyclophane complexes of rhodium and iridium supported by pentamethylcyclopentadienyl ligand [M(η6-pcp)η5-C5Me5)](BF4)2 (M = Rh an・・・, Inorganica Chimica Acta, Inorganica Chimica Acta, 328, 254-258, 2002
    Summary:Syntheses and crystal structures of mononuclear [2.2]paracyclophane complexes of rhodium and iridium supported by pentamethylcyclopentadienyl ligand [M(η<sup>6</sup>-pcp)η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)](BF<sub>4</sub>)<sub>2</sub> (M = Rh and Ir)(共著)
  • A zigzag chain coordination polymer consisting of silver(I) ion having square planar geometry(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 328, 105-110, 2002
  • Benzopolythia compounds and di-nuclear silver(I) complex with tribenzo-1,4,5,8,9,12-hexathiatriphenylene as new electron donor ligand: synthesis, crystal structure and properties(共著), Science and Technology / Kinki University, Science and Technology / Kinki University, 14, 25 - 33, 2002 , Refereed
  • A double-decker silver(I) coordination polymer of 1-methylpyrene with columnar aromatic stacks. Effect of substituting groups on structure of silver(I) complexes with polycyclic aromatic hydrocarbons, M Munakata, JC Zhong, T Kuroda-Sowa, M Maekawa, Y Suenaga, M Kasahara, H Konaka, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 40(27), 7087 - +, Dec. 2001
    Summary:A novel silver(I) coordination polymer of I-methylpyrene (mpyr) with double-decker motifs, {[Ag-2(mpyr)(2)(ClO4)(2)]0.5benzene}(n) (1), was synthesized and characterized. Polymer I consists of I-D double-decker chains, which are formed by dimeric double-decker units ([Ag(mpyr)(ClO4)](2)) through the linkage of the perchlorate groups. In addition, the dimeric moieties between the adjacent chains are stacked to lead to column π-π stacks. Therefore, complex 1 can also be regarded as a 2-D stacking polymer, The effects of substituting groups, and other factors, on the structure of silver(I) complexes with polycyclic aromatic hydrocarbons are also discussed. [GRAPHICS]
  • Silver(I) coordination polymer of 2,5-bis(4 ',5 '-bis(methylthio)-1 ',3 '-dithiol-2 '-ylidene)-1,3,4,6-tetrathiapentalene (TTM-TTP) and its highly conductive iodine derivative, JC Zhong, Y Misaki, M Munakata, T Kuroda-Sowa, M Maekawa, Y Suenaga, H Konaka, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 40(27), 7096 - +, Dec. 2001
    Summary:The novel silver(I) coordination polymer with 2,5-bis(4',5'-bis(methylthio)-1',3'-dithiol-2'ylidene)-1,3,4,6-tetrathiapentalene (TTM-TTP), [Ag(TTM-TTP)(CF3SO3)](n) (1), which consists of 1-D waving chains, was synthesized and characterized. Polymer 1 can be also regarded as a 3-D supramolecular network formed via many shorter side-by-side and face-to-face (SS)-S-... contacts. This polymer and its iodine-doped compound 2 behave as semiconductors with σ(25&DEG;C) values of 7.1 x 10(-6) and 0.85 S cm(-1), respectively. [GRAPHICS]
  • A double-decker silver(I) coordination polymer of 1-methylpyrene with columnar aromatic stacks. Effect of substituting groups on structure of silver(I) complexes with polycyclic aromatic hydrocarbons, M Munakata, JC Zhong, T Kuroda-Sowa, M Maekawa, Y Suenaga, M Kasahara, H Konaka, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 40(27), 7087 - +, Dec. 2001
    Summary:A novel silver(I) coordination polymer of I-methylpyrene (mpyr) with double-decker motifs, {[Ag-2(mpyr)(2)(ClO4)(2)]0.5benzene}(n) (1), was synthesized and characterized. Polymer I consists of I-D double-decker chains, which are formed by dimeric double-decker units ([Ag(mpyr)(ClO4)](2)) through the linkage of the perchlorate groups. In addition, the dimeric moieties between the adjacent chains are stacked to lead to column π-π stacks. Therefore, complex 1 can also be regarded as a 2-D stacking polymer, The effects of substituting groups, and other factors, on the structure of silver(I) complexes with polycyclic aromatic hydrocarbons are also discussed. [GRAPHICS]
  • Effects of paramagnetic ferrocenium cations on the magnetic properties of the anionic single-molecule magnet [Mn(12)O(12)(O(2)CC(6)F(5))(16)(H(2)O)4](-), T Kuroda-Sowa, M Lam, AL Rheingold, C Frommen, WM Reiff, M Nakano, J Yoo, AL Maniero, LC Brunel, G Christou, DN Hendrickson, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 40(25), 6469 - 6480, Dec. 2001
    Summary:The preparation and physical characterization are reported for the single-molecule mag et salts [M(CP ')(2)](n)- [Mn(12)O(12)(O(2)CC(6)F(5))(16)(H(2)O)(4)] (M = Fe, n = 1, Cp ' = C(5)Me(5) (2a), C(5)H(5) (2b); M = Co, n = 1, Cp ' = C(5)Me(5) (2c), C(5)H(5) (2d); M = Fe, n = 2, Cp ' = C(5)Me(5) (2e), C(5)H(5) (2f)) to investigate the effects of paramagnetic cations on the magnetization relaxation behavior of [Mn(12)](-) anionic single-molecule magnets. Complex 2a . 2H(2)O crystallizes in the orthorhombic space group Aba2, with cell dimensions at 173 K of a = 25.6292(2) Angstrom, b = 25.4201(3) Angstrom, c = 29.1915(2) Angstrom, and Z = 4. Complex 2c . 2CH(2)Cl(2).C(6)H(14) crystallizes in the monoclinic space group P2(1)/c, with cell dimensions at 173 K of a = 17.8332(6) Angstrom, b = 26.2661(9) Angstrom, c = 36.078 1 (11) Angstrom, beta = 92.8907(3)degrees, and Z = 4. These two salts consist of either paramagnetic [Fe(C(5)Me(5))(2)](+) cations or diamagnetic [Co(C(5)Me(5))(2)](+) cations, and [Mn(12)O(12)(O(2)CC(6)F(5))(16)(H(2)O)(4)](-) anions. The structures of the anions in the two salts are similar, consisting of a central Mn404 cubane moiety, surrounded by a nonplanar ring of eight Mn atoms that are bridged by and connected to the cube via mu (3)-O(2-) ions. The oxidation states of four Mn sites out of eight outer Mn ions in complex 2a were assigned to be +2.75 from the valence bond sum analysis although the disordering of bridging carboxylates prevents more precise determination. On the other hand in complex 2c, one Mn site out of eight outer Mn ions was identified as a Mull ion, accommodating the "extra" electron; this was deduced by a valence bond sum analysis. Thus, the anion in complex 2c has a Mn(1)(II)Mn(7)(III)Mn(4)(IV) oxidation state description. The Jahn-Teller axes of the Mn(III) ions in both anions are roughly aligned in one direction. All complexes studied exhibit a single out-of-phase ac magnetic susceptibility (chi "M) signal in the 4.6-4.8 K range for complexes 2a-2d and in the 2.8-2.9 K range for complexes 2e and 2f at I kHz ac frequency. The temperature of the chi "M peaks is frequency dependent, as expected for single-molecule magnets. From Arrhenius plots of the frequency dependence of the temperature of the chi "M maxima, the effective energy barriers U(eff) for changing spin from "up" to spin "down" were estimated to be 50-54 K for complexes 2a-2d and 27-28 K for complexes 2e and 2f. The least-squares fits of the reduced magnetization data indicate that both complexes 2a and 2d have ground states of S = 21/2. High-frequency EPR spectra were recorded for complex 2a at frequencies of 217, 327, and 434 GHz in the 4.5-30 K range. The observed transition fields were least-squares fit to give g = 1.91, D = -0.35 cm(-1), and B(4)(0) -3.6 x 10(-7) cm(-1) for the S = 21/2 ground state. The effective energy barrier U(eff) is slightly lower than U estimated from D, which is consistent with the thermally assisted tunneling model. Magnetization hysteresis loops were observed for complexes 2a and 2c. Although 2a was oriented in a different manner as expected by strong magnetic field, both complexes show clear hysteresis loops with some steps on them, indicating that the effect of the magnetic cation on the magnetization relaxation of the anionic [Mn(12)](-) complex is rather small. An 11% (57)Fe enriched complex 2b was studied by means of Mossbauer spectroscopy down to as low as 1.7 K. Slow paramagnetic relaxation broadening and magnetic hyperfine splitting were evident in the low-temperature spectra, indicating that the iron atoms feel a growing magnetic field owing to slow magnetization reversal in the [Mn(12)](-) anions.
  • A bent two-coordinate silver(I) complex with 2,2',3,3'-tetrahydro-4,4'-dithia-1,1'binaphthylidene(共著), Acta Crystallographica, Acta Crystallographica, E57, 1-2, 2001
  • Crystal Structure of η5-Pentamethylcyclopentadienyl-η6-toluene Rhodium Tetrafluoroborate, [Rh(Cp*)(η6-C6H5Me)](BF4)2 (Cp* = η5-C5Me5)(共著), Analytical Sciences, Analytical Sciences, 17, 1361-1362, 2001
  • A novel 2-D silver(I)-acyclic polyene coordination polymer assembled with linear unsaturated bridges(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 322, 150-156, 2001
  • Silver(I) coordination polymers of cyclic sulfur ligand, 2,2',3,3'-tetrahydro-4,4'-dithia-1,1'-binaphthylidene(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 322, 133-137, 2001
  • Carbon and nitrogen coordinated silver(I) polymers of 2,4,6-triphenoxy-1,3,5-triazine(共著), Polyhedron, Polyhedron, 20, 2321-2327, 2001
  • Silver(I) complexes of triazine derivatives having stepped π-π interactions and 2D sheets(共著), Polyhedron, Polyhedron, 20, 2037-2043, 2001
  • Effects of paramagnetic [Fe(C5Me5)2]+ cation on the anionic single-molecule magnet, [Mn12O12(O2CC6H4F(-o))16(H2O)4]・・・, Polyhedron, Polyhedron, 20, 1529-1536, 2001
    Summary:Effects of paramagnetic [Fe(C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub>]<sup>+</sup> cation on the anionic single-molecule magnet, [Mn<sub>12</sub>O<sub>12</sub>(O<sub>2</sub>CC<sub>6</sub>H<sub>4</sub>F(-o))<sub>16</sub>(H<sub>2</sub>O)<sub>4</sub>]<sup>-</sup>(共著)
  • Spiral, Herringbone, and Triple-Decker Silver(I) Complexes of Benzopyrene Derivatives Assembled through η2-Coordination(共著), Inorg. Chem., Inorg. Chem., 40, 3191-3199, 2001
  • 1-D cyano-bridged heterometallic complexes consisting of 1, 4, 8, 11-tetraazacyclotetradecanesilver(II) and tetracyanopalladium(II) or tetracyanoplatinum(II)(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 317, 268-275, 2001
    Summary:2001
  • A One-Dimensional Metallocyclophane with Columnar Aromatic Stacking : The Silver((]G0001[))η2-Coordination Complex of 1, 2-Benztriphenylene(共著), Angew. Chem. Int. Ed. Eng.(/), Angew. Chem. Int. Ed. Eng.(/), 39(24), 4555 - 4557, 2000 , Refereed
  • Bridged silver((]G0001[))complexes of the polycyclic aromatic compounds tetraphenylethylene and 1, 1, 4, 4-tetraphenyl-1, 3-butadiene(共著), ┣DBInorg. Chem.(/)-┫DB, ┣DBInorg. Chem.(/)-┫DB, 39(24), 5430 - 5436, 2000
  • A variety of one-, two-and three-dimensional copper((]G0001[))and silver((]G0001[))co-ordination polymers assembled by 1, 4-bis(4-pyridyl)butadiyne and 1, 4-bis(2-pyridyl)butadiyne(共著), ┣DBJ. Chem. Soc., Dalton Trans.(/)-┫DB, ┣DBJ. Chem. Soc., Dalton Trans.(/)-┫DB, (22), 4160 - 4166, 2000
  • Three-dimensional silver((]G0001[))co-ordination polymer with pocket structures(共著), ┣DBJ. Chem. Soc., Dalton Trans.(/)-┫DB, ┣DBJ. Chem. Soc., Dalton Trans.(/)-┫DB, (20), 3620 - 3623, 2000
  • Structural control of silver((]G0001[))coordination polymers : construction of two-and three-dimensional frameworks of silver((]G0001[))ions bridged by dicyanopyrazne derivatives(共著), ┣DBInorganica Chimica Acta(/)-┫DB, ┣DBInorganica Chimica Acta(/)-┫DB, 308(1/2), 17 - 21, 2000
  • 2-D Interwoven and 3-D 5-fold Interpenetrating Silver ((]G0001[)) Complexes of 1-(Isocyanidomethyl-1 H-benzotriazole and 1,3-Bis (dicyanomethylindene)indan (共著)), Inorg. Chem., Inorg. Chem., 39(19), 4273 - 4279, 2000
  • Structural Studies of Silver ((]G0001[)) Coordination Polymers with Aryl Iodide Derrived Ligan (共著), Inorg. Chem., Inorg. Chem., 39(10), 2146 - 2151, 2000
  • δMM*-πL. Odd Electron Delocalization onto Aromatic Bridging Ligands in a Paramagnetic Dirhodium Complex and Intermolecular π-Stack Interaction in Crystal (共著), Bull. Chem. Soc. Jpn., Bull. Chem. Soc. Jpn., 73(3), 657 - 668, 2000
  • Syntheses, Structures, and Magnetic Properties of Di-μ3-Chloride-Bridged Tripalladium Compounds, [Pd33-Cl)2(HqnS)6]Cl2 (HqnS=Quinoline-2 (1H)-thione)and {Pd33-C・・・, Bull. Chem. Soc. Jpn., Bull. Chem. Soc. Jpn., 73, 651, 2000
    Summary:Syntheses, Structures, and Magnetic Properties of Di-μ<sup>3</sup>-Chloride-Bridged Tripalladium Compounds, [Pd<sub>3</sub>(μ<sup>3</sup>-Cl)<sub>2</sub>(HqnS)<sub>6</sub>]Cl<sub>2</sub> (HqnS=Quinoline-2 (1H)-thione)and {Pd<sub>3</sub>(μ<sup>3</sup>-Cl)<sub>2</sub>(Et<sub>2</sub>dtc)<sub>2</sub> (PPh<sub>3</sub>)<sub>2</sub>]C<sub>6</sub>H<sub>6</sub>(Et<sub>2</sub>dtc=N.N'-Diethyldithiocarbamate)(共著)
  • Unsymmetrical Oxygenation Products of [Pd(mnt)2]2- : Syntheses and Crystal Structures of (Bu4N)2[Pd (mnt) {O2S2C2(CN)2}] and One-Dimensional Coordination Polymer (B・・・, Bull. Chem. Soc. Jpn., Bull. Chem. Soc. Jpn., 73(2), 391 - 394, 2000
    Summary:Unsymmetrical Oxygenation Products of [Pd(mnt)<sub>2</sub>]<sup>2-</sup> : Syntheses and Crystal Structures of (Bu<sub>4</sub>N)<sub>2</sub>[Pd (mnt) {O<sub>2</sub>S<sub>2</sub>C<sub>2</sub>(CN)<sub>2</sub>}] and One-Dimensional Coordination Polymer (Bu<sub>4</sub>N)<sub>2</sub>[AgPd (mnt){O<sub>2</sub>S<sub>2</sub>C<sub>2</sub>(CN)<sub>2</sub>}]<sub>2</sub> (mnt=1,2-Dicyano-1,2-ethylenedithiolato)(共著)
  • A linear-Chain Silver ((]G0001[))Coordination Polymer with tetrakis (isopropylthio) p-benzoquinone (共著), Acta Crystallographica, Acta Crystallographica, C55, 1623, 1999
  • Syntheses and structures of dinuclear rhodium ((]G0001[)) complexes and 1-D zigzag-chain rhodium ((]G0001[)) co-ordination polymers bridged by rod-like bidentate nitrogen ligands (共著), J. Chem. Soc., Dalton Trans., J. Chem. Soc., Dalton Trans., (24), 4357 - 4362, 1999
  • Silver ((]G0001[)) Complex Assemblies with Nonplanar Aromatic Compounds (共著), Inorg. Chem., Inorg. Chem., 38(25), 5674 - 5680, 1999
  • Mobility of Silver ((]G0001[)) Ions around the Propeller Ligand, Hexaphenylbenzene (HPB), in Silver ((]G0001[))π-Complexes (共著), Inorg. Chem., Inorg. Chem., 38(25), 5668 - 5673, 1999
  • Two-dimensional supramolecular co-ordination compounds of silver ((]G0001[)) with box structure (共著), J. Chem. Soc., Dalton Trans., J. Chem. Soc., Dalton Trans., 2737, 1999
  • A novel double-strand helical motif in a two-dimensional polymeric complex of silver perchlorate with benzo[e]acephenanthrylene(共著), J. Chem. Soc. , Chem. Commun., J. Chem. Soc. , Chem. Commun., (16), 1545 - 1546, 1999
  • Construction of 2-D multilayer structures : silver((]G0001[)) complexes with linear aromatic compounds(共著), J. Chem. Soc. , Dalton Trans., J. Chem. Soc. , Dalton Trans., 2529, 1999
  • Silver((]G0001[)) tetraiodoethylene complexes with twisted olefin moiety(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 290(2), 251 - 255, 1999
  • Unique tetranuclear copper((]G0002[)) cluster and monomeric iron((]G0002[)), ((]G0003[)) complexes with a tris(imidazolyl) chelating ligand(共著), Polyhedron, Polyhedron, 18(15), 2047 - 2053, 1999
  • Synthesis and crystal structure of tetranuclear copper((]G0001[)) and silver((]G0001[)) complexes bridge by 2-amono-1,3,4-thiadiazole(atdz) : [Cu4(atdz)6](ClO4)4・2CH3OH and [Ag4(atdz)Summary:Synthesis and crystal structure of tetranuclear copper((]G0001[)) and silver((]G0001[)) complexes bridge by 2-amono-1,3,4-thiadiazole(atdz) : [Cu<sub>4</sub>(atdz)<sub>6</sub>](ClO<sub>4</sub>)<sub>4</sub>・2CH<sub>3</sub>OH and [Ag<sub>4</sub>(atdz)<sub>6</sub>](ClO<sub>4</sub>)<sub>4</sub>(共著)
  • Construction of Metal Sandwich Systems Derived from Assembly of Silver((]G0001[)) Complexe with Polycyclic Aromatic Compounds(共著), J. Am. Chem. Soc., J. Am. Chem. Soc., 121(21), 4968 - 4976, 1999
  • Cationic Tetrasilver Complex of Hexaphenylbenzene(共著), Inorg. Chem., Inorg. Chem., 38(7), 1376 - 1377, 1999
  • A novel eight-membered Cu4I4 ring supported by sulfur atoms of an M(mnt)2 moiety : syntheses and crystal structures of (NBun4)2[M(mnt)2Cu4I4](M=Ni, Pd, P・・・, J. Chem. Soc. , Chem. Commun., J. Chem. Soc. , Chem. Commun., 455, 1999
    Summary:A novel eight-membered Cu<sub>4</sub>I<sub>4</sub> ring supported by sulfur atoms of an M(mnt)<sub>2</sub> moiety : syntheses and crystal structures of (NBu<sup>n</sup><sub>4</sub>)<sub>2</sub>[M(mnt)<sub>2</sub>Cu<sub>4</sub>I<sub>4</sub>](M=Ni, Pd, Pt ; mnt=1,2-dicyano-1,2-ethylenedithiolato with doubly-bridged one-dimensional chain structures(共著)
  • Open dimeric and capped plymeric container molecules : calixarene and resorcinarene complexes of Ag((]G0001[)) co-ordinated by participation of the upper-rim carbon atoms(共著), J. Chem. Soc. , Dalton Trans., J. Chem. Soc. , Dalton Trans., 373, 1999
  • Toward the construction of functional solid-state supramolecular metal complexes containing copper((]G0001[)) and silver((]G0001[))(共著), Adv. Inorg. Chem., Adv. Inorg. Chem., 46, 173, 1999
  • Crystal structure of tetranuclear palladium complex bridged by bis(diphenylphosphino)methane, [Pd-4(mu-dppm)(4)(mu-Cl)(2)](ClO4)(2)center dot bpe, M Maekawa, M Munakata, T Kuroda-Sowa, Y Suenaga, ANALYTICAL SCIENCES, ANALYTICAL SCIENCES, 14(2), 451 - 453, Apr. 1998
  • S・・・S Contact-assembled tetrathiafulvalene derivatives of copper((]G0001[)) and silver((]G0001[)) co-ordination polymers and organic radical cation salt(共著), J. Chem. Soc. , Dalton Trans., J. Chem. Soc. , Dalton Trans., (19), 3255 - 3261, 1998
  • Construction of Copper((]G0001[)) Coordination Polymers of 1,2,4,5-Tetracyanobenzene with Zigzag Sheet and Porous Frameworks(共著), Inorg. Chem., Inorg. Chem., 37(21), 5651 - 5656, 1998
  • Supramolecular Silver((]G0001[)) Complexes with Highly Strained Polycyclic Aromatic Compounds(共著), J. Am. Chem. Soc., J. Am. Chem. Soc., 120(34), 8610 - 8618, 1998
  • Synthesis and crystal structure of dinuclear palladium((]G0001[)) dppm complex with 4-mercaptopyridine in the thione mode. [Pd2(μ-dppm)2(HpyS)2](ClO6)2・CH3OH(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 281(1), 116 - 119, 1998
  • A Novel Two-Dimensional Copper((]G0001[)) Coordination Polymer with Bridging TTF : Crystal Structure of [Cu(dmtpn)2(TTF)0.5](ClO6)(dmtpn : 2,5-dimethylterephthalonitrile)(共著), Chem. Lett., Chem. Lett., 1998
  • Dicopper complexes derived from 4-amino-2,1,3-benzothiadiazole with versatile co-ordination number and geometry(共著), J. Chem. Soc. , Dalton Trans., J. Chem. Soc. , Dalton Trans., 1499, 1998
  • Synthesis and structure of a novel bis(μ-η2-thianthrene)disilver((]G0001[)) bis(perchlorate)(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 271(1/2), 145 - 150, 1998
  • Crystal Structure of Bis(diphenylphosphino)methane Dipalladium((]G0001[)) Nitrate Complex, [Pd2(μ-dppm)2(NO3)2](共著), Masahiko MAEKAWA, Megumu MUNAKATA, Takayoshi KURODA-SOWA, Yusaku SUENAGA, Analytical Sciences, Analytical Sciences, 14(2), 447 - 449, 1998
  • Synthesis and crystal structure of two ternary dicopper((]G0001[)) complexes having the unsymmetrical coordination arrangement bridged by 1,8-naphthyridine(napy). [Cu2(napy)2(Me2CO)](PF6)2・2Me・・・, Inorganica Chimica Acta, Inorganica Chimica Acta, 271(1/2), 129 - 136, 1998
    Summary:Synthesis and crystal structure of two ternary dicopper((]G0001[)) complexes having the unsymmetrical coordination arrangement bridged by 1,8-naphthyridine(napy). [Cu<sub>2</sub>(napy)<sub>2</sub>(Me<sub>2</sub>CO)](PF<sub>6</sub>)<sub>2</sub>・2Me<sub>2</sub>CO and [Cu<sub>2</sub>(napy)<sub>2</sub>(dppm)(CH<sub>3</sub>CN)](PF<sub>6</sub>)(共著)
  • A linear-Chain Copper((]G0001[)) Coordination Polymer with Hexakis(methylthio) benzene(共著), Acta Crystallographica, Acta Crystallographica, C54, 1566, 1998
  • Syntheses and structures of copper((]G0001[)) and silver((]G0001[)) coordination polymer with hexakis(methylthio)benzene(共著), Polyhedron, Polyhedron, 18(3/4), 429 - 436, 1998
  • Two-dimensional silver((]G0001[)) compound with square mesh structure, [Ag(dcpz)](ClO4)(dcpz=pyrazine-2,3-dicarbonitrile)(共著), Polyhedron, Polyhedron, 18(1/2), 191 - 195, 1998
  • Synthesis and crystal structure of dinuclear and tetranuclear palladium dppm complexes. [Pd-2(mu-dppm)(2)(vpy)Cl] and [Pd-4(mu-dppm)(4)(mu-X)(2)](ClO4)(2) (X = Cl, Br and I), M Maekawa, M Munakata, T Kuroda-Sowa, Y Suenaga, POLYHEDRON, POLYHEDRON, 17(20), 3657 - 3663, 1998
    Summary:Reaction of the intermediate [Pd-2(mu-dppm)(2)](2+) which was prepared from [Pd-2(mu-dppm)(2)X-2] (X = Cl, Br and I) and AgClO4 in ethanol with 2-vinylpyridine (vpy) afforded dinuclear Pd(I) dppm complex [Pd-2(mu-dppm)(2)(vpy)Cl] (1). When the intermediate [Pd-2(mu-dppm)(2)](2+) was allowed to stand for a few days, tetranuclear Pd dppm complex [Pd-4(mu-dppm)(4)(mu-X)(2)](ClO4)(2) (X = Cl (2); Br (3) and I (4)) was systematically formed. The structure for 1 and 2 were crystallographically determined. On complex 1 two Pd atoms are doubly bridged by two dppm ligands to form an eight-membered Pd2P4C2 framework in a twist-chair conformation. Each Pd atoms is also coordinated by the Cl atom and the N atom of vpy in unsymmetrical side-by-side mode. The Pd-Pd distance is 2.597(2) Angstrom and the torsion angle between two Pd2P4 plane is 43.2 degrees. On the other hand four Pd atoms on 2 are bridged by four dppm ligands to form a rectangular Pd-4 core, which is composed of the shorter Pd-Pd separations (2.590(1) Angstrom) and the close Pd ... Pd separations (3.818(2) Angstrom). The later Pd ... Pd separation is also bridged by the Cl atom. The Pd-P distance (2.351(1) Angstrom) bridging the close Pd ... Pd separation is rather longer than that (2.238(2) Angstrom) bridging the shorter Pd-Pd separation. (C) 1998 Elsevier Science Ltd. All rights reserved.
  • Mercury((]G0002[)) complexes of4,5-ethylenedithio-1,3-dithiole-2-thione, having S・・・S and S・・・Cl contact assembled ribbon structure(共著), Polyhedron, Polyhedron, 17(13/14), 2267 - 2270, 1998
  • Syntheses and structures of two-dimensional copper((]G0002[)) coordination polymer with 3,4,9,10-perylenetetracarboxylic acid and ethylenediamine(共著), Polyhedron, Polyhedron, 17(13/14), 2207 - 2211, 1998
  • Self-assembly of copper((]G0001[)) and silver((]G0001[)) complexes with square-grid and channel structures(共著), J. Chem. Soc. , Dalton Trans., J. Chem. Soc. , Dalton Trans., 1121, 1998
  • Assembly of a mixed-valence Cu((]G0001[)/(]G0002[)) system coupled by multiple hydrogen bonding through tetrahydroxybenzoquinone(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 268(2), 317 - 321, 1998
  • Preparation, characterization and X-ray crystal structures of I-2 and copper(II) complexes of 2,11-dithia[3.3]paracyclophane, M Yamamoto, LP Wu, T KurodaSowa, M Maekawa, Y Suenaga, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 258(1), 87 - 91, May 1997
    Summary:The crystal structures of dtpcpI(4) (1), [CuCl2(dtpcp)(EtOH)] (2) and [CuBr2(dtpcp)(MeOH)] (3), where dtpcp = 2,11-dithia[3,3]-paracyclophane, have been determined by X-ray crystallography. Complex 1 contains two crystallographically independent I(2)dtpcpI(2) molecules in the unit cell, each having crystallographical -1(C-i) symmetry. The structures of both 2 and 3 consist of a one-dimensional array of copper(II) ions linked via dithia-bridged paracyclophane. While 1 is an electric insulator at room temperature, the iodine oxidation of 2 and 3 produced charge-transfer complexes which gave conductivities 10(-5.5) and 10(-6.9) S cm(-1), respectively. Both 2 and 3 show the typical ESR signals and normal magnetic moments for a dilute copper(II) ion at room temperature, but exhibit an antiferromagnetic coupling at low temperature through the conjugated rr system of the bridging ligand.
  • An S center dot center dot center dot S contact assembled tetranuclear copper(I) complex with sulfur-rich ligand, 4,5-ethylenedithio-1,3-dithiole-2-thione, J Dai, M Munakata, LP Wu, T KurodaSowa, Y Suenaga, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 258(1), 65 - 69, May 1997
    Summary:A copper(I) complex with 4,5-ethylenedithio-1,3-dithiole-2-thione (C5H4S5), [Cu4I4(C5H4S5)(4)]infinity was synthesized and the molecular structure and packing were characterized crystallographically. The metal center is a stepped Cu4I4 core coordinated by two ligands C5H4S5 in different ways. One is bidentate coordinated through the thiocarbonyl group and the thioether group and the other is monodentate coordinated only through thiocarbonyl group. The Cu4I4 clusters are bridged by bidentate C5H4S5 molecules to form one-dimensional polymeric chains along the c-axis, and these chains form a three-dimensional network linked by interchain S ... S contacts. The shortest S ... S contact distance is 3.257(2) Angstrom. A crystal of the complex is triclinic with space group P (1) over bar, a=11.350(5) Angstrom, b=11.854(3) Angstrom, c=9.275(5) Angstrom, alpha=97.32(4)degrees,beta=112.35(4)degrees, gamma=67.67(2)degrees, V=1067.0(9) Angstrom(3), Z=2, R=0.034, R-w=0.051.
  • Structural Control of Copper((]G0001[)) Coordination Polymers : Construction of One-, Two-, and Three-demensional Frameworks of Tetrahedral Copper((]G0001[)) Ions Bridged by Dicyanobenzene Derivatives(共著), Inorg. Chem., Inorg. Chem., 36(27), 6382 - 6389, 1997
  • Two Types of New Polymeric Copper((]G0001[)) Complexes of Pyrazinecarboxamide Having Channel and Helix Structures(共著), Inorg. Chem., Inorg. Chem., 36(23), 5416 - 5418, 1997
  • Construction and Conductivity of W-Type Sandwich Silver((]G0001[)) Polymers with Pyren an Perlene(共著), Inorg. Chem., Inorg. Chem., 36(21), 4903 - 4905, 1997
  • Crystal Structure of Dinuclear Copper((]G0001[)) Complex with 1,2,4,5-tetramethylmercaptobenzene, [Cu(tmmb)(]G0001[)]2(共著), Yusaku SUENAGA, Masahiko MAEKAWA, Takayoshi KURODA-SOWA, Megumu MUNAKATA, Hiroshi MORIMOTO, Nobuyuki HIYAMA, Susumu KITAGAWA, Analytical Sciences, Analytical Sciences, 13(4), 651 - 652, 1997
  • Syntheses, structures and properties of linear copper(I) coordination polymers with tetrakis(ethylthio)tetrathiafulvalene and tetrakis(propylthio)tetrathiafulvalene(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 261(2), 169 - 174, 1997
  • S…S Contact-assembled silver(I) complexes of 4,5-ethylenedithio-1,3-dithiole-2-thio having unique supramolecular networks(共著), J. Chem. Soc. , Dalton Trans., J. Chem. Soc. , Dalton Trans., 2363, 1997
  • Redetermination of Crystal Structure of Bispotassium(m-Chloro)(Bischloro)copper(I)K2CuCl3 with Infinite Chains(共著), Analytical Sciences, Analytical Sciences, 13, 647, 1997
  • Crystal Engineering of Multidimensional Copper(I) and Silver(I) Coordination Supermolecules and Polymers with Funcitons(共著), Bull. Chem. Soc. Jpn, Bull. Chem. Soc. Jpn, 70(8), 1727 - 1743, 1997
  • Double Hydrogen Bond-and π-π-Stacking-Assembled Two-Dimensional Copper(I) Complex of 2-Hydroxyquinoxaline(共著), Inorg. Chem., Inorg. Chem., 36(12), 2688 - 2690, 1997
  • Synthesis and structure of a three-dimensional copper(II) coordination polymer with 1,2-bis(imidazol-l'-yl)ethane(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 256(1), 155 - 159, 1997
  • Crystal Structure of Bis{cis-bis(diphenylphosphino)ethylene}palladium(0) Aceton Solvate(共著), Masahiko MAEKAWA, Takayoshi KURODA-SOWA, Yusaku SUENAGA, Megumu MUNAKATA, Analytical Sciences, Analytical Sciences, 13(2), 319 - 320, 1997
  • A unique coordination polymer consisting of two parallel C5H4S5 molecules bridging two silver(I) ions(C5H4S5=4,5-ethylenedithio-1,3-dithiole-2-thione)(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 255(1), 163 - 166, 1997
  • Structure and 1HNMR study of copper(I) Complex with ethylene and tetramethylenediamine(共著), Polyhedron, Polyhedron, 16, 67, 1997
  • Synthesis and Characterization and X-Ray Crystal Structures of Tetrakis(ethylthio)tetrathiafulvalenium Hexachlorodicopper(II)and Hexabromodicopper(II)(共著), Mol. Cryst. Liq. Cryst., Mol. Cryst. Liq. Cryst., 285, 75, 1996
  • TTC1-TTF Cation Coordinated to Copper(I) : Crystal Structure and Properties of [(TTC1-TTF)CuBr2]2(共著), Mol. Cryst. Liq. Cryst., Mol. Cryst. Liq. Cryst., 285, 69, 1996
  • Syntheses, Crystal Strucures and Magnetic Behavior of Polymeric Lanthanide Complexes With Benzenehexacarboxylic Acid(Mellitic Acid)(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 249(2), 183 - 189, 1996
  • Syntheses,Structures And Properties Of Palladium((]G0002[)) Complexes With Photochromic 4-Methoxyazobenzene(共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 248(2), 147 - 152, 1996
  • Self-Assembly Of Copper((]G0001[)) Complexes Into 3-Dimensional Coordinnation Polymers With Channel Networks By Hydrogen-Bonding Or By Tridentate Ligands(共著), J.Chem.Soc.,Dalton Trans., J.Chem.Soc.,Dalton Trans., 2031, 1996
  • An Unusual Tetranuclear Copper((]G0002[)) Acetate Structure With An Open Cubane Cu4O4 Framework(共著), J.Chem.Soc.,Dalton Trans., J.Chem.Soc.,Dalton Trans., 2179, 1996
  • One-,Two-and Three-Dimensional Copper((]G0001[)) and Silver((]G0001[)) Complexes of 2,11-dithia[3.3]paracyclophane(共著), J.Chem.Soc.,Dalton Trans., J.Chem.Soc.,Dalton Trans., 1525, 1996
  • Synthesis and Structure of Polymeric Silver((]G0001[)) Complex of Tetrakis(methylthio)tetrathiafulvalene : The First Example of the Silver((]G0001[)) Ion Coordinated Directly to TTF-Derivatives(共著), Mol.Cryst.liq.Cryst., Mol.Cryst.liq.Cryst., 284, 319 - 327, 1996
  • Interpenetrating Diamondoid Frameworks with π-π Stacking of Alternate Coordinated and Uncoordinated Ligands : Crystal Structures of Copper((]G0001[)) Coordination Compounds, [Cu(DMTPN)2]X(DMTPN)(thf) (DMTPN = 2, 5-Dimethylterephthalonitrile;・・・, Chem.Lett., Chem.Lett., 349, 1996
    Summary:Interpenetrating Diamondoid Frameworks with π-π Stacking of Alternate Coordinated and Uncoordinated Ligands : Crystal Structures of Copper((]G0001[)) Coordination Compounds, [Cu(DMTPN)<sub>2</sub>]X(DMTPN)(thf) (DMTPN = 2, 5-Dimethylterephthalonitrile; X = BF<sub>4</sub>, ClO<sub>4</sub>)(共著)
  • Reversible Photochromism of a Crystalline Dithienylethene Copper((]G0001[)) Polymer(共著), J.Am.Chem.Soc., J.Am.Chem.Soc., 118(13), 3305 - 3306, 1996
  • Construction of Three-Dimensional Supramolecular Coordination Copper(I) Compounds with Channel Structures Hosting a Variety of Anions by Changing the Hydrogen-Bonding Mode and Distances(共著), J.Am.Chem.Soc., J.Am.Chem.Soc., 118(13), 3117 - 3124, 1996
  • Synthesis and Structure of a Three-Dimensional Lanthanum((]G0003[)) Coordination Polymer with Mellitate,{La2[C6(COO)6]・2H2O9}・2H2O(共著), J.Coord.Chem., J.Coord.Chem., 37, 361, 1996
  • Crystal structure and magnetic properties of manganese(II) mellitate, [Mn-2{C-6(COO)(6)}(H2O)(6)][Mn(H2O)(6)]center dot 2H(2)O with two-dimensional layered structure and three-dimensional hydrogen bonding networks, LP Wu, M Yamamoto, T KurodaSowa, M Maekawa, J Fukui, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 239(1-2), 165 - 169, Nov. 1995
    Summary:The crystal and molecular structure of manganese(II) mellitate, [Mn-2{C-6(COO)(6)}(H2O)(6)][Mn(H2O)(6)]. 2H(2)O, has been determined by X-ray structure analysis, The complex crystallizes in the monoclinic system, space group C2/c, with cell constants a = 23.298(3), b = 6.456(3), c = 17.072(2) Angstrom, beta = 101.01(1)degrees and Z = 4. The structure was solved and refined to R = 0.029 (R(w) = 0.036). There are two types of manganese ions in the structure. Mn(1) is situated on a crystallographic center of symmetry and bound to six water molecules while Mn(2) is coordinated octahedrally by three water molecules and three carboxylate oxygen atoms. The major structure feature is that the polyanion formed by Mn(2) ions and the mellitate hexanions with composition of [Mn-2{C-6(COO)(6)}(H2O)(6)](2n-)(n) possesses a two-dimensional layered structure which is linked through a complex three-dimensional hydrogen bonding associated with the Mn(1) cation [Mn(H2O)(6)](2+) and the water of crystallization. Analysis of variable-temperature magnetic susceptibility data (5.0-300 K) shows that the complex displays antiferromagnetic exchange.
  • Synthesis and crystal structure of a tetranuclear bis(diphenylphosphino)methane palladium complex capped by a mu(4)-bonded sulfide: [Pd-4(mu-dppm)(4)(mu(4)-S)]center dot 4(CH3)(2)CO, M Maekawa, M Munakata, T KurodaSowa, T Goto, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 239(1-2), 159 - 163, Nov. 1995
    Summary:We have prepared the tetranuclear palladium complex [Pd-4(mu-dppm)(4)(mu(4)-S)] (1) capped by a mu(4)-bonded sulfide and crystallographically characterized it. Four Pd atoms are bridged by four dppm ligands to form the rectangular Pd-4 core, which are capped by the mu(4)-bonded sulfide from the side above the Pd-4 plane. It was suggested that the mu(4)-bonded S atom is derived from the cleavage of the C-S bond of diethyldithiocarbamate. Complex 1 has the following crystal data: monoclinic, C2/c, a = 30.503(8), b = 12.061(2), c = 31.686(7) Angstrom, beta = 118.25(2)degrees, V = 10268(8) Angstrom(3), Z = 4, R = 0.051, R(w) = 0.070.
  • SYNTHESIS AND CRYSTAL-STRUCTURE OF A TRINUCLEAR NICKEL(0) COMPLEX WITH 1,4-BIS(TRIMETHYLSILYL)-1,3-BUTADIYNE IN THE MONODENTATE AND MU(2)-ETA(2),ETA(2)-BRIDGING MODE - [NI-3(TMSB)(COD)(3)], M MAEKAWA, M MUNAKATA, T KURODASOWA, K HACHIYA, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 236(1-2), 181 - 184, Aug. 1995
    Summary:A novel trinuclear nickel (0) complex [Ni-3(tmsb)(cod)(3)] (cod = 1,5-cyclooctadiene) with 1,4-bic(trimethylsilyl)-1,3-butadiyne (tmsb) in the monodentate and mu(2)-eta(2),eta(2)-bridging modes has been prepared and characterized crystallographically. The complex is triclinic, P $($) over bar$$ 1, a = 11.947(2), b = 15.407(3), c = 10.213(2) Angstrom, alpha = 96.47(2), beta = 102.32(2), gamma = 107.05(1)degrees, V = 1724.7(6) Angstrom(3), Z = 2, R = 0.046 and R(w) = 0.052. The acetylenic C-C distance of 1.343(7) Angstrom in the mu(2)-eta(2),eta(2)-bridging mode is considerably larger than that (1.267(7) Angstrom) in the monodentate mode. A weak nu (C=C) frequency was found at 1784 cm(-1).
  • SYNTHESIS AND CRYSTAL-STRUCTURE OF A MONONICKEL(0) AND DINICKEL(0) ETHYLENE COMPLEX WITH 4,4'-BIPYRIDINE - [NI(4,4'-BPY)(C2H4)(2)](2)[NI-2(4,4'-BPY)(C2H4)(4)], M MAEKAWA, M MUNAKATA, T KURODASOWA, K HACHIYA, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 232(1-2), 231 - 234, Apr. 1995
    Summary:A novel nickel(0) ethylene complex [Ni(4,4'-bpy)(C2H4)(2)](2)[Ni-2(4,4'-bpy)(C2H4)(4) (1) (4,4'-bpy = 4,4'-bipyridine) which includes two species of mono- and dinuclear nickel(0) ethylene complex in a unit cell has been prepared and characterized crystallographically. Complex 1 is triclinic, space group P (1) over bar, a = 10.543(4), b = 12.546(4), c = 9.190(4) Angstrom, alpha = 109.64(3), beta = 98.57(4), gamma = 90.98(3)degrees, V = 1129.1(8) Angstrom(3), Z = 1, R = 0.037 and R(w) = 0.039. Each of three nickel atoms provide the trigonal geometry due to the coordination of the nitrogen atom of 4,4'-bpy and two ethylene molecules. Elongation of the C=C distance by similar to 0.03 Angstrom is smaller than that of the usual three-coordinate nickel(0) complexes with alkenes, suggesting that the contribution of pi back-donation is considerably weaker.
  • FORMATION OF A METALLOCYCLE BY DIMERIZATION OF ACRYLONITRILE - CRYSTAL-STRUCTURE OF THE HEXAKIS((1,4-DICYANOBUTANE-1,4-DIYL)NICKEL(II)) COMPLEX, M MAEKAWA, M MUNAKATA, T KURODASOWA, K HACHIYA, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 230(1-2), 249 - 252, Mar. 1995
    Summary:A novel hexanickel(II) complex [Ni-6(NCCHCH2CH2CHCN)(6)] (2) with 1,4-dicyanobutane-1,4-diyl (L) which was produced by the metal-induced dimerization of acrylonitrile (AN) has been isolated and the structure has been determined crystallographically. Complex 2 is triclinic, space group P (1) over bar, a=9.998(2), b=10.363(2), c=9.960(3) Angstrom, alpha=110.35(2), beta=103.46(2), gamma=88.97(2)degrees U=938.7(4) Angstrom(3), Z=1, R=0.029 and R(w)=0.034. Each nickel atom is coordinated by two carbon atoms of L and two nitrogen atoms of the cyano group of two other L, providing a square-planar geometry. The six nickel atoms are bridged by the cyano group and carbon atom to form the slightly distorted octahedral Ni-6 core.
  • Co-ordination Versatility of 3,5-Bis(2-pyridyl)pyrazole in Silver and Copper Compounds(共著), J.Chem.Soc.Dalton Trans., J.Chem.Soc.Dalton Trans., 4099, 1995
  • Synthesis and Structure of Unsymmetrical Trinuclear Nickel(0) Complexes with the 1,3-butadiynes in the Monodentate and μ222・Bonding Mode[Ni3(L)(cod)3](L=tmsb and apbd)(共著), Polyhedron, Polyhedron, 14(20/21), 2879 - 2885, 1995
  • Synthesis and Structural Characterization of Crown Thioether Complexes of Silver((]G0001[)) and Copper((]G0002[))(共著), J.Chem.Soc.Dalton Trans., J.Chem.Soc.Dalton Trans., 3215, 1995
  • Synthses,Structures and Properties of Copper((]G0001[)) Co-ordination Polymers with Bridging Phenazine : Construction of One-and Two-dimentional Structures with π-π Stracking of Phenazine(共著), J.Chem.Soc.Dalton Trans., J.Chem.Soc.Dalton Trans., 2201, 1995
  • Cleavage of the central C-C bond of 1,4-diphenyl-1,3-butadiyne : synthesis and crystal structure of a triangular trinickel complex bicapped by phenylacetylide [Ni3(μ-dppm)331-CCPh)2](共著), Inorganica Chimica Acta, Inorganica Chimica Acta, 232, 1, 1995
  • Synthesis,Structure and Properties of a Linear Copper((]G0001[)) Coordination Polymer with Tetrakis(ethylthio)tetrathiafulvalen(共著), Polyhedron, Polyhedron, 14(12), 1647 - 1651, 1995
  • Syntheses and Structures of One-and Two-dimensional Copper((]G0001[)) Coordination Polymers with Tetrakis(ethylthio)tetrathiafulvalene(TTC2-TTF)and the Properties of Their Iodine-doped Compounds "jointly worked", Polyhedron, Polyhedron, 14(10), 1343 - 1350, 1995
  • Syntheses and Structures of Tetranuclear and Hexanuclear Copper(I) Complexes with Iminomethanethiolato Bridges Derived from Isothiocyanate "jointly worked", Polyhedron, Polyhedron, 14(8), 1003 - 1009, 1995
  • Building of 2D Sheet of Tetrakis(methylthio)tetrathiafulvalenes Coordinating to Copper(I) Halides with Zigzag and Helical Frames and the 3D Network through the S…S Contacts "jointly worked", Inorg. Chem., Inorg. Chem., 34(10), 2705 - 2710, 1995
  • Synthesis and crystal structure of tetranuclear nickel(0) complex with 1,4-diphenylbutadiyne in the η2, η2-bridging mode "jointly worked", Inorganica Chimica Acta, Inorganica Chimica Acta, 231(1/2), 213 - 216, 1995
  • Crystal Structure of Bis(diethyldithiocarbamato)palladium((]G0002[)) Benzene Solvate, [Pd(Et2dtc)2]・(C6H6) "jointly worked", Masahiko MAEKAWA, Megumu MUNAKATA, Takayoshi KURODA-SOWA, Masanori MOTOKAWA, Analytical Sciences, Analytical Sciences, 10(6), 977 - 978, 1994
  • Synthesis and Structure of a Copper(I) Complex with 1-Aminopyrene : Building of a 2D Structure Composed of Stacking Pyrene Rings "jointly worked", J. Chem. Soc. , Chem. Commun., J. Chem. Soc. , Chem. Commun., (20), 2331 - 2332, 1994
  • Copper ((]G0001[)) Iodine Coordination Polymer with Tetrakis(ethylthio)tetrathiafulvalene (TTC2-TTF) and the Iodine-Doped compound "jointly worked", Bull. Chem. Soc. Jpn., Bull. Chem. Soc. Jpn., 67(11), 3009 - 3011, 1994
  • Alkylation of 2-vinylpyridine and crystal structure of bis{(acetylacetonate)(1-pyridylbutyl)nickel(II)} complex "jointly worked", Inorganica Chimica Acta, Inorganica Chimica Acta, 227(1), 149 - 151, 1994
  • Synthesis, crystal structure and characterization of nickel(0) acrylonitrile complexes with a bidentate N-donor ligand "jointly worked", Inorganica Chimica Acta, Inorganica Chimica Acta, 227(1), 137 - 143, 1994
  • Tetrakis[{μ3-ethoxy(N-methylimino)-methanethiolato}copper(I)] "jointly worked", Acta Crystallographica, Acta Crystallographica, 50(7), 1026 - 1028, 1994
  • Architecture of 2D Sheets with Six-Membered Rings of Coppers Interconnected by 2,1,3-Benzothiadiazoles and a Layered Structure Composed of the 2D Sheets "jointly worked", Inorg. Chem., Inorg. Chem., 33(7), 1284 - 1291, 1994
  • Crystal Structure of Bis(2-mercaptothiazoline)copper(I) Chloride, [Cu(mtz)2Cl] "jointly worked", Analytical Sciences, Analytical Sciences, 9, 887-888., 1993
  • Structure of a Trinuclear Nickel(II) Complex Bridged by 3, 5-Dimethylpyrazole(3,5-Me2pz), [Ni3(3,5-Me2pz)4(acac)2] "jointly worked", Inorganica Chimica Acta, Inorganica Chimica Acta, 208,243, 1993
  • Non-superconductivity of La2-xBaXCaCu2O6 "jointly worked", Solid State Communication, Solid State Communication, 75,425, 1990
  • A new chlorooxocuprate, Ca3Cu2O4Cl2, with an oxygen defect intergrowth "jointly worked", Journal of Solid State Chemistry, Journal of Solid State Chemistry, 84,178, 1990
  • Non-superconductivity of La1.6(Sr, Ca)1.4Cu2Oy "jointly worked", Solid State Communication, Solid State Communication, 72,541, 1989
  • Crystal and molecular structure of bis(trimethylphosphite)octacarbonyldimanganese (Mn-Mn) "jointly worked", Inorganica Chimica Acta, Inorganica Chimica Acta, 101,45, 1985
  • An ESR study of a hydrido-bridged trimetal cluster, Mn3(μ-H)3(CO)12-. "jointly worked", Journal of Organometallic Chemistry, Journal of Organometallic Chemistry, 337,1993, 1985
  • Electron spin resonance of Re2(μ-H)2(CO)8-. and Re2(μ-H)2(CO)6(μ-dppm)-. (dppm=(Ph2P)2CH2). An indication of large 5d-6p mixing in ・・・, Journal of the American Chemical Society, Journal of the American Chemical Society, 107,6471, 1985
    Summary:Electron spin resonance of Re<sub>2</sub>(μ-H)<sub>2</sub>(CO)<sub>8</sub><sup>-.</sup> and Re<sub>2</sub>(μ-H)<sub>2</sub>(CO)<sub>6</sub>(μ-dppm)<sup>-.</sup> (dppm=(Ph<sub>2</sub>P)<sub>2</sub>CH<sub>2</sub>). An indication of large 5d-6p mixing in the odd-electron orbital "jointly worked"
  • Photochemical decarbonylation of Mn2(μ-PPh2)2(CO)8 to form Mn2(μ-PPh2)(μ-CO)(CO)6 with a semi-bridging carbonyl "jointly worked", Journal of Organometallic Chemistry, Journal of Organometallic Chemistry, C10,276, 1984
  • Electronic Structure of the Rh-Rh bond in dirhodium tetracarboxylates from a study of electronic spectra of neutral molecules and their cation radicals "jointly worked", Inorganic Chemistry, Inorganic Chemistry, 22,56, 1983
  • Electronic structure of the Rh-Rh bond in Rh2(O2CR)4(PY3)2 by electron spin resonance study of their cation radicals "jointly worked", Journal of the American Chemical Society, Journal of the American Chemical Society, 103,364, 1981
  • Variety of spin transition temperatures of iron(II) spin crossover complexes with halogen substituted Schiff-base ligands, Hqsal(X) (X = F, Cl, Br, and I), Takayoshi Kuroda-Sowa, Rina Isobe, Norifumi Yamao, Tomohiro Fukumasu, Takashi Okubo, Masahiko Maekawa, POLYHEDRON, POLYHEDRON, 136, 74 - 78, Nov. 2017 , Refereed
    Summary:The preparation and magnetic properties of four Fe(11) Schiff-base complexes, [Fe(qsal(x))(2)] (Hqsal(x) = N-(8'-quinoly1)-2-hydroxy-5-halogeno-l-salicylaldimine; X = F(1), C1(2), Br(3), 1(4)) are reported. X-ray single crystal structure analyses of 1 and 2 reveal that Fe(II) ions in both complexes are coordinated by two qsalx ligands in meridional fashion. Molecular packing of 1 shows that a non-planar qsal(F) ligand interacts with neighboring two qsal(F) ligand's through pi-pi interactions, while that of 2 shows that two planar qsal(cl) ligands interact each other through pi-pi interaction. Although the magnetic property of 1 shows a high spin state at all the temperature range measured, the chi T-T plots of 2, 3, and 4 show gradual spin crossover behaviors with T1/2 of 308 K, 341 K, and 340 K, respectively. (C) 2017 Elsevier Ltd. All rights reserved.
  • Structural diversity of copper(I) cyclodiene complexes bridged by 3,6-bis (2-pyridyl)-1,2,4,5-tetrazine, Masahiko Maekawa, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 467, 204 - 211, Oct. 2017 , Refereed
    Summary:The reactions of CuX2 center dot nH(2)O (X = ClO4, BF4), Cu turnings and 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (bptz) with excess 1,5-cyclooctadiene (cod) in Me2CO under C2H4 afforded dinuclear Cu(I)-bptz/eta(2), eta(2)-cod-X complexes {(1) and (4)} and dinuclear Cu(I)-2,5-H(2)bptz/eta(2), eta(2)-cod-X complexes {(2) and (5)}. In complexes 1 and 4, each Cu(I) atom is coordinated by two chelate N atoms of bptz and two C=C bonds of eta(2), eta(2)-cod in the distorted tetrahedral geometry to produce a transoid dinuclear structure. It should be noted that the redox state of the central tetrazine ring is electrochemically neutral. In complexes 2 and 5, each Cu(I) atom is coordinated by two chelate N atoms of 2,5-H(2)bptz and two C=C bonds of eta(2), eta(2)-cod in the distorted tetrahedral geometry to afford a transoid dinuclear structure in the 2,5-dihydro form. In contrast, the reactions of Cu(BF4)(2)center dot nH(2)O, Cu turnings and bptz with excess 2,5-norbornadiene (nbd) in MeEtCO under C2H4 afforded Cu(I)-2,5-H(2)bptz/eta(2)-nbd-BF4 complex (6). Each Cu(I) atom is coordinated by two chelate N atoms in bptz and one C=C bond in eta(2)-nbd to form a transoid dinuclear structure in the 2,5-dihydro form. These facts show that the flexible cod can preferentially produce a Cu(I)cyclodiene complex in the eta(2), eta(2)-mode (complexes 1, 2, 4 and 5) while the rigid nbd can produce a Cu (I)-cyclodiene complex in the eta(2)-mode (complex 6). Furthermore, the reaction of Cu(NO3) center dot 3H(2)O, Cu turnings and bptz with excess nbd in Me2CO under C2H4 afforded tetranuclear Cu(I)-4,5-H(2)bptz-NO3 complex (7) containing a unique anionic [Cu-2(nbd)(NO3)(4)](2) moiety. In the cationic [Cu-4(4,5H(2)bptz) 4] 4+ moiety, four Cu(I) atoms are bridged by four 4,5-H(2)bptz ligands to form a [4 x 4] grid-like tetranuclear structure with two 4,5-H(2)bptz ligands lying above the Cu4 mean plane and two lying below. In the anionic [Cu-2(nbd)(NO3)(4)](2) moiety, the two Cu atoms are bridged by one nbd ligand in the mu(2)-eta(2), eta(2)-mode. (C) 2017 Elsevier B. V. All rights reserved.
  • Synthesis, Crystal Structure, and Electroconducting Properties of a 1D Mixed-Valence Cu(I)-Cu(II) Coordination Polymer with a Dicyclohexyl Dithiocarbamate Ligand, Kenji Nakatani, Kento Himoto, Yuki Kono, Yuuki Nakahashi, Haruho Anma, Takashi Okubo, Masahiko Maekawa, Takayoshi Kuroda-Sowa, CRYSTALS, CRYSTALS, 5(2), 215 - 225, Jun. 2015 , Refereed
  • Spin-crossover behaviors in solvated cobalt(II) compounds, Shinya Hayami, Manabu Nakaya, Hitomi Ohmagari, Amolegbe Saliu Alao, Masaaki Nakamura, Ryo Ohtani, Ryotaro Yamaguchi, Takayoshi Kuroda-Sowa, Jack K. Clegg, DALTON TRANSACTIONS, DALTON TRANSACTIONS, 44(20), 9345 - 9348, 2015 , Refereed
    Summary:Two solvated cobalt(II) terpyridine complexes, [Co(MeO-terpy)(2)]-(BF4)(2)center dot H2O (1 center dot H2O) and [Co(MeO - terpy)(2)](BF4)(2)center dot acetone (1 center dot acetone) were prepared. Annealing each of these complexes resulted in the formation of two desolvated species, 1 and 1', respectively. 1 center dot H2O and 1 exhibited two - step and gradual SCO. The compound 1 center dot acetone has high - spin at all temperatures and 1' undergoes a reverse spin transition due to a phase change.
  • Preparations and structural diversity of copper(I) ethylene adducts with related 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine ligands, Masahiko Maekawa, Takeshi Miyazaki, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, Susumu Kitagawa, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 410, 46 - 53, Jan. 2014 , Refereed
    Summary:The reaction of [Cu(C2H4)n]NO3, Cu turnings, 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (bptz), and ferrocene in Me2CO under C2H4 afforded black crystals of [Cu-4(4,5-H(2)bptz)(4)][Cu(C2H4)(NO3)(2)](2)(NO3)(2)center dot 2Me(2)CO (7). In the [Cu-4(4,5-H(2)bptz)(4)](4+) cation moiety, four Cu(I) atoms are bridged by four 4,5-H(2)bptz ligands to form a [4 x 4] grid-like tetranuclear structure. In the [Cu(C2H4)(NO3)(2)] anion moiety, the Cu atom is coordinated by two NO3 anions in the unidentate coordination mode and by the C=C bond of C2H4 to form a mononuclear Cu(I)-C2H4 adduct in the trigonal-planar geometry. It should be noted that two anionic Cu(I)-C2H4 adducts [Cu(C2H4)(NO3)(2)] are present as a co-crystal. The similar reaction of Cu(BF4)(2)center dot H2O, Cu turnings, bptz, and ferrocene in MeEtCO under C2H4 afforded colorless crystals of [Cu-2(bpdpyz)(C2H4) (2)](BF4)(2) (9). In the [Cu-2(bpdpyz)(C2H4)(2)](2+) cation moiety, each Cu(I) atom is coordinated by two chelate N atoms of bpdpyz and the C=C bond of C2H4 to afford an unusual cisoid dinuclear structure. This result shows that 3,6-bis(2-pyridyl)-4,5-dihydropyridazine (bpdpyz) can be produced by the cycloaddition of bptz with C2H4 via a Diels-Alder addition and retro-Diels-Alder elimination of dinitrogen to form complex 9. In contrast, the reaction of Cu(BF4)(2)center dot H2O, Cu turnings, and bptz in Me2CO in the absence of ferrocene afforded black crystals of [Cu-4(4,5-H(2)bptz)(4)](BF4)(4)center dot Me2CO (12). Although the apparent structure of the [Cu-4(4,5-H(2)bptz)(4)](4+) cation moiety is similar to that of the [Cu-4(4,5-H(2)bptz)(4)](4+) cation moiety in complex 7, the shape of the Cu-4 framework is closer to a square structure, resulting in the adjacency of the two opposite tetrazine rings. The preparations and structural diversity of Cu(I)-C2H4 adducts with the related bptz ligands are described in addition to related previous results. (C) 2013 Elsevier B.V. All rights reserved.
  • Structural diversity among copper(I) ethylene adducts of 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine, Masahiko Maekawa, Takeshi Miyazaki, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, Susumu Kitagawa, DALTON TRANSACTIONS, DALTON TRANSACTIONS, 42(12), 4258 - 4266, 2013 , Refereed
    Summary:The reaction of Cu(ClO4)center dot 6H(2)O, Cu turnings, and 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (bptz) in Me2CO under C2H4 afforded brownish-red needle crystals of {[Cu-2(bptz(center dot-))(C2H4)(2)](ClO4)}(2) (1) as a minor product and brown plate crystals of [Cu-2(2,5-H(2)bptz)(C2H4)(2)](ClO4)(2)center dot 2Me(2)CO (2). The X-ray crystallographic study showed that complex 1 is composed of two independent [Cu-2(bptz(center dot-))(C2H4)(2)](+) cation moieties and two ClO4- anions. In both of the cation moieties, each Cu(I) atom is coordinated by two chelate N atoms of bptz(center dot-) and the C=C bond of C2H4 in the trigonal-planar geometry to form a unique transoid dinuclear Cu(I)-bptz(center dot-)/C2H4 adduct bearing a metal-stabilized tetrazine anion radical, bptz(center dot-), which was produced by the one-electron reduction of bptz. In contrast, complex 2 consists of one [Cu-2(2,5-H(2)bptz)(C2H4)(2)](2+) cation moiety, two ClO4- anions, and two solvated Me2CO molecules. Each Cu(I) atom is coordinated by two chelate N atoms of 2,5-H(2)bptz and the C=C bond of C2H4 in the trigonal-planar geometry to afford a transoid dinuclear Cu(I)-C2H4 adduct with 2,5-H(2)bptz, which was produced by the two-electron reduction of bptz. Additionally, the similar reaction of Cu(ClO4)center dot 6H(2)O, Cu turnings, and bptz in Me2CO or MeEtCO under C2H4 in the presence of ferrocene afforded orange brick crystals of [Cu-2(bpdpyz)(C2H4)(2)]- (ClO4)(2)center dot Me2CO (3) and [Cu-2(bpdpyz)(C2H4)(2)](ClO4)(2) (4), respectively, together with complex 1 in higher yield. This result shows that 3,6-bis(2-pyridyl)-4,5-dihydropyridazine (bpdpyz) was produced by the cyclo-addition of bptz with C2H4 via a Diels-Alder addition and retro-Diels-Alder elimination of dinitrogen. In complexes 3 and 4, each Cu(I) atom is coordinated by two chelate N atoms of bpdpyz and the C=C bond of C2H4 to afford an unusual cisoid dinuclear Cu(I)-C2H4 adduct. Further attempts to react excess [Cu(C2H4)(n)]ClO4 with bptz in Me2CO under C2H4 afforded black brick crystals of [Cu-4(4,5-H(2)bptz)(4)](ClO4)(4)center dot 2Me(2)CO (5) together with complex 1. Complex 5 is the first [4 x 4] grid-like tetranuclear Cu(I) complex constructed by the combination of Cu(I) ion and 4,5-H(2)bptz. The four Cu(I) atoms are spanned by four 4,5-H(2)bptz ligands, with two lying above the Cu-4 mean plane and two lying below. In contrast, the similar reaction of excess [Cu(C2H4)(n)]ClO4 with bptz in Me2CO under C2H4 in the presence of ferrocene afforded reddish-brown brick crystals of {[Cu-2(2,5-H(2)bptz)(C2H4)(2)](ClO4)(2)}(2)center dot Me2CO (6) together with complexes 1 and 5. Complex 6 is composed of two independent [Cu-2(2,5-H(2)bptz)(C2H4)(2)](2+) cation moieties, four ClO4- anions, and a solvated Me2CO molecule. It is interesting that the structures of the two [Cu-2(2,5-H(2)bptz)(C2H4)(2)](2+) cation moieties are different: one has a nearly planar structure and the other possesses a boat conformation owing to the bent central dihydrotetrazine ring.
  • Syntheses, crystal structures, spectroscopic characterization and unusual thermal robustness of mono- and di-nuclear Iridium(III) hydride complexes of 2,2 '-bipyrimidine, Masahiko Maekawa, Yukimi Kubo, Kunihisa Sugimoto, Toshie Minematsu, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, POLYHEDRON, POLYHEDRON, 40(1), 145 - 152, Jun. 2012 , Refereed
    Summary:The reaction of [Ir(H)(2)(PPh3)(2)(Me2CO)(2)]BF4 with 2,2'-bipyimidine (bpym) in CHCl3 afforded the yellow needle crystals of mononuclear Ir(III)-bpym/hydride complex [Ir(H)(2)(PPh3)(2)(bpym)]BF4 center dot 4CHCl(3) (1). In contrast, when CH2Cl2 or CHCl3 solution of [Ir(H)(2)(PPh3)(2)(Me2CO)(2)]BF4 were layered by the THF solution of bpym, red brick crystals of dinuclear Ir(III)-bpym/hydride complex [Ir-2(H)(4)(PPh3)(4)(bpym)](BF4)(2)center dot 2CH(2)Cl(2)center dot 2THF (2) and orange brick crystals of [Ir-2(H)(4)(PPh3)(4)(bpyrn))(BF4)(2)center dot 2CHCl(3) (3) were solvent-selectively formed. The UV-Vis spectra of complexes 1-3 in the solid state demonstrated that the absorptions of complexes 2 (495 nm) and 3 (510 nm) exhibited a significant red-shift relative to that (420 nm) of complex 1. Complexes 1-3 redissolved in CD2Cl2 gave several well-resolved H-1 NMR signals at 23 degrees C. It is noteworthy that all H-1 NMR signals of the coordinated pyrimidine rings in complexes 1-3 were shifted to the upfield region relative to those of the metal-free bpym ligand, in which the coordination shifts (Delta delta = delta(complex) - delta(metal-free)) are {-0.12 (H-6.6'), -0.73 (H-4.4') and -0.55 (H-5.5') ppm} for complex 1, {-0.81 (H-4.4') and -0.67 (H-5.5') ppm} for complex 2, and {-0.72 (H-4.4') and -0.58 (H-5.5') ppm} for complex 3. It was proved that unusual upheld shifts can be caused by the diamagnetic anisotropic ring current effect between the adjacent bpym and phenyl groups of PPh3. Thermogravimetric analysis (TG-DTA) showed that Ir(III)-bpym/hydride complexes 1-3 were thermochemically stable to a relatively high temperature near 330 degrees C. (C) 2012 Elsevier Ltd. All rights reserved.
  • Structural controls of 2D sheet copper(I) ethylene and carbonyl coordination polymers directed by anions and solvents, Masahiko Maekawa, Toshi Tominaga, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, Susumu Kitagawa, CRYSTENGCOMM, CRYSTENGCOMM, 14(18), 5955 - 5962, 2012 , Refereed
    Summary:The reactions of Cu(I) ion with {BF4-, ClO4-, or PF6-} anions and 6,6'-dimethyl-4,4'-bipyrimidine (Me(2)bpm) under C2H4 or CO in MeOH preferentially afforded three 2D sheet Cu(I)-Me(2)bpm/{C2H4, CO} adducts [Cu-4(Me(2)bpm)(3)(C2H4)(3)(MeCN)](BF4)(4)center dot 0.33MeOH}(n) (2), {[Cu-4(Me(2)bpm)(3)(C2H4)(3)(MeOH)(0.33)](ClO4)(4)}(n) (3), and {[Cu-4(Me(2)bpm)(3)(CO)(3)(MeCN)](PF6)(4)center dot 0.33MeCN}(n) (4), whereas the similar reaction of Cu(I) ion with a BF4- anion and Me(2)bpm under CO in MeOH gave the metallamacrocyclic tetranuclear Cu(I)-Me(2)bpm/CO adduct [Cu-4(Me(2)bpm)(4)(CO)(4)](BF4)(4)center dot 4MeOH (5). In Cu(I)-Me(2)bpm/{C2H4, CO} adducts 2-4, it should be noted that the metallacalix[3]arene structures of the [Cu-3(Me(2)bpm)(3)](3+) framework are linked through another Cu atom with MeCN (2 and 4) or MeOH (3) to produce a chiral 2D sheet structure with small Cu-3 and large Cu-9 cavities. In the small triangular Cu-3 cavities, one MeOH (2) or MeCN (4) molecule is encapsulated in complexes 2 and 4, whereas these Cu-3 cavities are empty in complex 3. In the large Cu-9 cavities, one anion (X = BF4- (2), ClO4- (3) or PF6- (4)) is surrounding by six Me groups of three Me(2)bpm on the upside and three anions (X) are functionally accommodated on the downside for complexes 2-4, respectively. In the Cu(I)-Me(2)bpm/CO adduct 5, two of the four BF4- anions are accommodated in the upper and lower cavities of the [Cu-4(Me(2)bpm)(4)] framework. We demonstrated that the metallamacrocyclic and polymeric 2D sheet Cu(I)-Me(2)bpm/{C2H4, CO} adducts can be reasonably self-assembled under the direction of anions and solvents.
  • Framework dimensionality of copper(I) coordination polymers of 4,4 '- bipyrimidine controlled by anions and solvents, Masahiko Maekawa, Toshi Tominaga, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, Susumu Kitagawa, CRYSTENGCOMM, CRYSTENGCOMM, 14(4), 1345 - 1353, 2012 , Refereed
    Summary:The reaction of [Cu(C2H4)(n)]NO3 with 4,4'-bipyrimidine (bpm) in Me2CO under C2H4 afforded a polymeric Cu(I)-bpm/C2H4 adduct [Cu-2(bpm)(C2H4)(NO3)(2)](n) (1) with an infinite 1-D zigzag chain structure. Similar reactions of [Cu(C2H4)(n)]ClO4 or [Cu(MeCN)(4)]BF4 with bpm in Me2CO under C2H4 afforded Cu(I)-bpm/C2H4 adducts {[Cu-3(bpm) (2)(C2H4) (2)](ClO4)(3)}(n) (2) and {[Cu-3(bpm)(2)(C2H4)(2)](BF4)(3)}(n) (3), respectively, which have an infinite 1-D zigzag ladder structure. It is interesting that two disordered ClO4- or BF4- anions are accommodated in the inside cavity of the ladder chains. In contrast, the reaction of [Cu(MeCN)(4)]BF4 with bpm in MeOH under C2H4 afforded a Cu(I)-bpm/C2H4 adduct {[Cu-4(bpm) (3)(C2H4) (3)(MeOH)](BF4)(4)center dot 2H(2)O center dot 3MeOH}(n) (4). Three Cu atoms are bridged by three bpm ligands to form a metallacalix[3] arene structure with three legs of C2H4. Furthermore, these metallacalix[3] arenes are linked through another Cu atom in the terminal N atom of bpm to produce a chiral 2-D sheet structure with space group P6(3). One BF4- anion is accommodated in the small triangular Cu-3 cavities, whereas three disordered BF4- anions are encapsulated in the large triangular Cu-3 cavities. In contrast to complex 4, [Cu(MeCN)(4)]BF4 was reacted with bpm in MeOH under Ar, and C2H4 gas was then bubbled into the resultant brown suspensions. The reaction solution was allowed to come to room temperature, and Cu(I)-bpm complex {[Cu-3(bpm)(3)](SiF6)(1.5)}(n) (5) was collected. The tetrahedral Cu atom is coordinated by two N atoms in the chelate site of bpm and two N atoms in the terminal sites of two other bpm ligands to form two racemic metallacalix[3] arene structures. It is noteworthy that these metallacalix[3] arenes are joined through the bpm ligands to afford a 3-D cage structure consisting of two right-handed and left-handed helix networks. One disordered SiF62- anion is accommodated in the inside cavity between two opposite metallacalix[3] arene structures. On the basis of these results, it has been concluded that BF4-, PF6-, ClO4- and SiF62- anions can serve as anion templates to self-assemble polymeric Cu(I) C2H4 adducts and a cage compound in complexes 2-5. The NO3- anion is ineffective as an anion template, as indicated by the higher coordination ability of the NO3- anion in complex 1. Additionally, solvent-dependent effects have been observed in the formation process: Me2CO can preferentially induce polymeric 1-D chain and 1-D ladder structures in complexes 1-3, whereas MeOH can produce 2-D sheet and 3-D cage structures by the linage of metallacalix[3]arene structures in complexes 4 and 5.
  • Novel 1D Cu(I) coordination polymers formed by the combination of Cu(I) halides and 4-(2-pyridyl)pyrimidine, Masahiko Maekawa, Kunihisa Sugimoto, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, POLYHEDRON, POLYHEDRON, 29(14), 2807 - 2813, Sep. 2010 , Refereed
    Summary:Three novel 1D Cu(I) coordination polymers [Cu4X4(pprd)(2)](n) (X = Cl(1), Br(2) and I(3): pprd = 4-(2-pyridyl)pyrimidine) were systematically synthesized by Cu(I) halides and the pprd ligand, and they have been characterized by X-ray, IR, and TG-DTA analyses. The molecular structure of complex 1 essentially resembles to that of complex 2. In complexes 1 and 2, four Cu(I) atoms are bridged by four Cl or Br anions to form an eight-membered Cu4X4 framework in the twist-chair form. Furthermore, the Cu4X4 frameworks are coordinated by the chelate and bridging sites of two pprd ligands to form a unique 1D two-stepped Cu(I) coordination polymer, in which two stairs are formed by the Cu4X4 core and two heteroaromatic planes of pprd. In the crystal packing structures, it is interesting that two heteroaromatic planes of pprd are stacking along the b-axis for complex 1 and the a-axis for complex 2. In contrast, four Cu(I) atoms in complex 3 are bridged by four I atoms to form a Cu4I4 stepped cubane tetramer. Additionally, the Cu4I4 stepped cubane cores are linked by the chelate and bridging sites of two pprd ligands to form an infinite 1D zigzag-chain Cu(l) coordination polymer. The thermal decomposition behaviors for Cu(I)-X/pprd complexes 1, 2 and 3 were determined by thermogravimetric analysis (TG-DTA). Although the thermal decomposition behaviors of complex 1 were unidentified, those of complexes 2 and 3 were assigned. The mass loss at the first stage of thermal decomposition for polymeric [Cu4X4(pprd)(2)](n) was identical to the formation of oligomeric [Cu4X4(pprd)] by the elimination of one pprd molecule. The mass loss at the next stage was decided to the formation of Cu4X4 by the elimination of another pprd molecule. (C) 2010 Elsevier Ltd. All rights reserved.
  • Dye-sensitized Solar Cells with Halide-bridged Mixed-valence Cu(I)-Cu(II) Coordination Polymers with Hexamethylenedithiocarbamate Ligand, Kyung Ho Kim, Takashi Okubo, Naoya Tanaka, Naoto Mimura, Masahiko Maekawa, Takayoshi Kuroda-Sowa, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 39(7), 792 - 793, Jul. 2010 , Refereed
    Summary:The application of halide-bridged mixed-valence Cu(I)Cu(II) coordination polymers with hexamethylenedithiocarbamate (Hm-dtc) ligand as sensitizing materials for dye-sensitized solar cells (DSSCs) with poly(3,4-ethylenedioxythiophene) tetramethacrylate (PEDOT-TMA) counter electrode is novel. DSSCs having coordination polymers in comparison with a mononuclear Cu(Hm-dtc)(2) complex exhibited better power conversion efficiency because of the high photocurrent density.
  • Columnar Structure Formed by Dimeric Fe-II Schiff Base Complex: Twisted-Overlap Salophen Platforms and Ferromagnetic Interaction, Zhong Yu, Toshiyuki Shimizu, Toshi Tominaga, Takashi Okubo, Masahiko Maekawa, Takayoshi Kuroda-Sowa, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 82(10), 1274 - 1276, Oct. 2009
    Summary:Columnar assembly of dimeric Fell Schiff base complex based on twisted-overlap orientation of salophen platfonns exhibits ferromagnetic interactions at low temperature, which is ascribable to mu-phenoxy-bridged Fe ... Fe interactions and pi-pi interactions.
  • Ferromagnetic interaction in iron(II)-bis-Schiff base complexes, Atsuhiro Nabei, Takayoshi Kuroda-Sowa, Toshiyuki Shimizu, Takashi Okubo, Masahiko Maekawa, Megumu Munakata, POLYHEDRON, POLYHEDRON, 28(9-10), 1734 - 1739, Jun. 2009
    Summary:The preparation and magnetic properties of three Fe(II)-bis-Schiff base complexes, [Fe(2)(L1)2(4,4'-bpy)]center dot MeOH (1), [Fe(L2)(EtOH)] (2) and [Fe(L3)(MeOH)] (3) (L1 =N,N'-bis(2-hydroxy-1-naphthaldehyde)-1,2-phenylenediimine; L2 = N,N'-bis(salicylidene)-1,2-phenylenediamine; L3 = N,N'-bis(5-Cl-salicylidene)-1,2-phenylenediamine; 4,4'-bpy = 4,4'-bipyridine) are reported. X-ray single crystal structure analyses for 1-3 reveal that 1 shows a dinuclear Fe(II)-bis-Schiff base complex bridged by 4,4'-bpy, while 2 and 3 show mononuclear structures. Molecular packing of 2 shows a uniform one-dimensional chain structure through hydrogen bonds and Fe center dot center dot center dot pi interaction and that of 3 indicates significant pi-pi interaction to form a dimmer structure. The chi T-T plots of 1-3 show all ferromagnetic interaction at low temperature. The origin of the ferromagnetic interaction observed in 2 is tentatively ascribed to the dimer formation through Fe center dot center dot center dot pi interaction at low temperature. (C) 2008 Elsevier Ltd. All rights reserved.
  • {6,6 '-Dimethoxy-2,2 '-[o-phenylenebis(nitrilomethylidyne)]diphenolato}cobalt(II) dichloromethane disolvate, Atsuhiro Nabei, Takayoshi Kuroda-Sowa, Takashi Okubo, Masahiko Maekawa, Megumu Munakata, ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, ACTA CRYSTALLOGRAPHICA SECTION E-STRUCTURE REPORTS ONLINE, 65, M188 - U669, Feb. 2009
    Summary:The title compound, [Co(C(22)H(18)N(2)O(4))]center dot 2CH(2)Cl(2), was isolated from the reaction of N,N '(o-phenylene)bis(vanillalimine) (H(2)L) with Co(SCN)(2). The crystal structure contains a Co(II) ion surrounded by the L(2-) ligand in a slightly distorted square-planar fashion. Intermolecular C-H center dot center dot center dot O hydrogen-bonding contacts between the dichloromethane solvent molecules and the methoxy or carboxylate O atoms are observed in the crystal structure. The planar complex molecules stack through inversion related pi-pi interactions between the six-membered rings of the vanillalimine half ligands. The distance between centroids is 3.498 (2) angstrom and the perpendicular distance is 3.345 angstrom. A partial stacking is observed with a centroid-centroid distance of 3.830 (2) angstrom, a perpendicular distance of 3.350 angstrom and a slippage of 1.856 angstrom.
  • A unique chair-shaped hexanuclear Cu(I) metallamacrocyclic C2H4 adduct encapsulating a BF4- anion, Masahiko Maekawa, Atsuhiro Nabei, Toshi Tominaga, Kunihisa Sugimoto, Toshie Minematsu, Takashi Okubo, Takayoshi Kuroda-Sowa, Megumu Munakata, Susumu Kitagawa, DALTON TRANSACTIONS, DALTON TRANSACTIONS, (3), 415 - 417, 2009
    Summary:Three novel Cu(I)-C2H4 adducts bearing 4-(2-pyridyl)-pyrimidine were self-assembled, and the roles of anion and solvent were proved in the formation process.
  • The effect of molecular packing on the occurrence of spin crossover phenomena in one-dimensional Fe(II)-bis-Schiff base complexes, Atsuhiro Nabei, Takayoshi Kuroda-Sowa, Takashi Okubo, Masahiko Maekawa, Megumu Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 361(12-13), 3489 - 3493, Sep. 2008
    Summary:Two new one-dimensional Fe(II)-bis-Schiff base complexes, [Fe(L1)(pyz)] center dot CH(2)Cl(2) (1) and [Fe(L2)(pyz)] center dot 2CH(2)Cl(2) (2) (H(2)L1 = bis(O-vanillin)-O-phenylenediimine, H(2)L2 = bis(O-vanillin)-2,3-naphthalenediimine, pyz = pyrazine) are reported with their crystal structures and magnetic property. Compound 1 shows a two-step SCO behavior while 2 shows HS at all the temperature range measured. Although the extension of aromatic moiety from benzene (L1) to naphthalene (L2) was introduced for the purpose of strengthening the cooperativity, it leads to the absence of SCO, due to the unanticipated pi-pi interaction, which leads to the longer Fe-N bond lengths and a weak ligand field around Fe(II) ion. (c) 2008 Elsevier B. V. All rights reserved.
  • Bowl-shaped Cu(I) metallamacrocyclic ethylene and carbonyl adducts as structural analogues of organic calixarenes, Masahiko Maekawa, Hisashi Konaka, Toshie Minematsu, Takayoshi Kuroda-Sowa, Megumu Munakata, Susumu Kitagawa, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, (48), 5179 - 5181, 2007
    Summary:Three novel Cu(I) metallacalixarenes with C2H4 and CO legs, in which an anion is accommodated in the inside cavity, were self-assembled by anion templation and have been structurally characterized.
  • Sandwich-shaped silver(I) metallomacrocycles encapsulating a XF62-(X = Si, Ge and Sn) anion, M Maekawa, S Kitagawa, T Kuroda-Sowa, M Munakata, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, (20), 2161 - 2163, May 2006
    Summary:A series of sandwich-shaped complexes based on two square tetranuclear Ag(I) metallomacrocycles, {[Ag-4(pprd)(4)](2)(XF6)}(BF4)(6)center dot 8MeNO(2) (pprd = 4-(2-pyridyl)pydmidine; X = Si, Ge and Sri), in which a XF62- anion is encapsulated, were prepared and their structures were characterized both in the solid state and solution.
  • Syntheses, crystal structures and magnetic properties of Mn-12 single-molecule magnets with diphenylphosphate and their tetraphenylphosphonium salts, T Kuroda-Sowa, GQ Bian, M Hatano, H Konaka, S Fukuda, S Miyoshi, M Maekawa, M Munakata, H Miyasaka, M Yamashita, POLYHEDRON, POLYHEDRON, 24(16-17), 2680 - 2690, Nov. 2005 , Refereed
    Summary:The preparation and physical characterization are reported for a family of novel Mn-12 single-molecule magnets having diphenyl-phosphate (labeled dppH) bridges, [Mn12O12(O2CR)(16-x)(dpp)(x)(H2O)(y)] (R = CH3: x = 4, y = 0 (1); x = 8, y = 2 (2), R = Ph: x = 4, y = 4 (5); x = 8, = 4 (6), and R = Et: x = 4, y 4 (9)) and their tetraphenyl phosphate salts [Ph4P][Mn12O12(O2CR)(16-x)(dpp)(x)(H2O)(4)] (R = CH3: x = 4 (3); x 8 (4) and R = Ph: x = 4 (7); x = 8 (8)). The crystal structures of I and 5 were characterized by X-ray. The X-ray structure analysis of I reveals that there are four five-coordinate Mn-III ions with (MnH)-H-... approaches and without coordinating water molecules. The H-1 NMR measurements show H2O can coordinate to a vacant site of 1 in CD2Cl2 solution. Ac magnetic susceptibility measurements indicate that nine complexes are single-molecule magnets. The increase of the number of dpp(-) ligands resulted in a decrease of the U-eff values of neutral Mn-12 SMMs estimated from ac measurements. Complexes 1 and 5 show a quantum tunneling behavior, whose ground states were tentatively assigned to S = 10 with g = 1.78, and D = -0.60 K; S = 10 with g = 1.92, and D = -0.63 K, respectively. (c) 2005 Elsevier Ltd. All rights reserved.
  • Syntheses, crystal structure, and magnetic properties of Mn-12 single-molecule magnets with naphthalenecarboxylate bridges, [Mn12O12(O2CC10H7)(16)(H2O)(4)] and their tetraphenylphosphonium salts, GQ Bian, T Kuroda-Sowa, T Nogami, K Sugimoto, M Maekawa, M Munakata, H Miyasaka, M Yamashita, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 78(6), 1032 - 1039, Jun. 2005 , Refereed
    Summary:The preparation and physical characterization are reported for three Mn-12 single-molecule magnets (SMMs) having naphthalenecarboxylate bridges, [Mn12O12(2-nc)(16)(H2O)(4)] (1, 2-ncH = 2-naphthalenecarboxylic acid), its Ph4P+ salt (2) and [Mn12O12(1-nc)(16)(H2O)(4)] (3, 1-ncH = 1-naphthalenecarboxylic acid). Complex 1 center dot 2CH(2)Cl(2)center dot 4.5H(2)O crystallizes in the monoclinic space group C2/c, with cell dimensions at -160 degrees C of a = 28.524 angstrom, b = 17.819 angstrom, c = 36.058 angstrom, beta = 92.399 degrees, and Z = 4. The X-ray structure analysis of 1 center dot 2CH(2)Cl(2)center dot 4.5H(2)O reveals that each [Mn-12] molecule is connected to the neighboring molecules through eight pi... pi interactions to form a two-dimensional structure within the bc-plane. This is the first SMM that self-assembles two-dimensionally via pi... pi interaction. From Arrhenius plots of the frequency dependence of the temperatures of the X"(M) peaks, the effective energy barriers U-eff for the reversal of the magnetization spin were estimated to be 61 K, 53 K, and 61 K for high-temperature phases of 1-3, respectively, and 31 K and 33 K for the low-temperature (UT) phases of 1 and 3, respectively. The analysis of the reduced magnetization data suggests that the LT phase of I has an S = 9 ground state with g = 1.998 and D = -0.61 K.
  • Silver(l) compounds consisting of [2.2]paracyclophane: Reversible guest-driven solid-state transformation and incorporation behavior, T Kuroda-Sowa, SO Liu, Y Yamazaki, M Munakata, M Maekawa, Y Suenaga, H Konaka, H Nakagawa, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 44(6), 1686 - 1692, Mar. 2005 , Refereed
    Summary:Reaction of [2.2]paracyclophane with silver(l) heptafluorobutyrate (AgC3F7CO2) has isolated three novel networks: [Ag-4(PCP)(C3F7CO2)(4)](.)pyrene (1), [Ag-4(PCP)(C3F7CO2)(4)](.)phen (phen = phenanthrene) (2), and [Ag-4(PCP)(C3F7CO2)(4)](.) fluorene (3), and an intercalation compound [Ag-4(PCP)(C3F7CO2)(4)](.)2benzene (4). All the four complexes exhibit two-dimensional (2D) sheet structures in which AgC3F7CO2 form an infinite chain and pcp acts as linkage. 1, 2, and 3 show 2D flat sheets with cavities in which guest molecules are situated, whereas 4 exhibits 2D zigzag layers between which guest benzene molecules are intercalated. Pcp shows mu-di-eta(1)-eta(2) coordination mode in 1, mu-tetra-eta(1) coordination mode in 2 and 3, and mu-tetra-eta(2) coordination mode in 4. The reversible guest exchanges were observed between complex 1, 2, or 3 and intercalation compound 4. It is unprecedented for metal-organic inclusion complexes that the guest exchange occurs where the guest is the solute molecule. Furthermore, 4 can release the guest, and the original framework was completely recovered after reincorporation of benzene. It should be noted that 4 can incorporate pyrene, phen, and fluorene to give 1, 2, and 3, respectively, after desorption.
  • 3D coordination polymers of [2.2]paracyclophane and in situ silver(I) perfluoro-dicarboxylates: effects of the dicarboxylate spacers and conformations on the formation of complexes, SQ Liu, H Konaka, T Kuroda-Sowa, M Maekawa, Y Suenaga, GL Ning, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 358(4), 919 - 926, Mar. 2005 , Refereed
    Summary:Coordination polymers of [2.2]paracyclophane (pep) with in situ silver(l) perfluoro-dicarboxylates characterized by single crystal X-ray analysis are described. Structures are found to strongly depend on the dicarboxylate spacer (n). With disilver(l) tetrafluorosuccinate ((CF2)(n)(COOAg)(2), n = 2), 3D network with composition of [Ag-4(PCP)(C2F4(CO2)(2))(2)] (1) forms in which silver salts afford infinite double chains and pep act as linkages between chains. Changing the silver salt to disilver hexafluoroglutarate ((CF2)(n)(COOAg)(2), n = 3) produces 3D pillared-layer structure of composition of [Ag-4(pcp)(C3F6(CO2)(2))(2)] (.) THF (2) (THF = tetrahydrofuran), in which silver salts form 2D sheets and pep act as pillars between the sheets. With silver octafluoroadipate (HO2C(CF2),CO2Ag, n = 4), 2-fold interpenetrated diamond structure, [Ag-2(pcp)(2)(HO2CC4F8CO2)(2)](2) (.) 2toluene (3), is obtained in which silver-anion chains and silver-pcp chains are connected with each other in the perpendicular manner. The three complexes represent unprecedented metal-organic networks of silver(I) multicarboxylates and polycyclic aromatic compounds. Additionally, the effects of the dicarboxylate conformations as well as the solvents on the resulting structures were discussed. (c) 2004 Elsevier B.V. All rights reserved.
  • Porous copper(I) complexes of 2,11-dithia[3.3]paracyclophane: desorption and adsorption of guest molecules, SQ Liu, H Konaka, T Kuroda-Sowa, Y Suenaga, H Ito, GL Ning, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 357(12), 3621 - 3631, Sep. 2004 , Refereed
    Summary:Four copper(I) complexes of 2,11-dithia[3.3]paracyclophane (dtpcp), [CuI(dtpcp)] . MeCN (1), [CuBr(dtpcp)] . MeCN (2), [CuCl(dtpcp)] . MeCN (3) and [Cu2I2(dtPCP)(2)] . Me-thf (4) (Me-thf = 2-methyltetrahydrofuran), have been synthesized and their molecular structures determined by X-ray crystallography. Complexes I and 2 are isostructural, and exhibit 31) networks with elliptical channels along a-axis, which are constructed by dtpcp molecules bridging zigzag CuI and CuBr chains, respectively. Complexes 3 and 4 are 21) porous sheet networks constructed by bridging the zigzag copper-dtpcp chains via rhombic ring of Cu2X2 (X = Cl or 1). All sheets in 3 are packed in an eclipsed manner through pi-pi stackings to generate channels along the a-axis. However, the 2D porous sheets in 4 are packed in an offset mode such that channels are not formed along c-axis. Complexes I and 2 can reversibly incorporate guest acetonitriles without collapse of structures, and the original frameworks of I and 2 are completely recovered after incorporation of guests which are confirmed by X-ray powder diffraction (XRPD) pattern and H-1 NMR spectrum. Additionally, complex I exhibits selectivity in size and polarity for guest inclusion. (C) 2004 Elsevier B.V. All rights reserved.
  • A Mn-12 single-molecule magnet [Mn12O12(OAc)(12)(dpp)(4)] (dppH = diphenyl phosphate) with no coordinating water molecules, GQ Bian, T Kuroda-Sowa, H Konaka, M Hatano, M Maekawa, M Munakata, H Miyasaka, M Yamashita, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 43(16), 4790 - 4792, Aug. 2004 , Refereed
    Summary:The preparation and physical characterization are reported for a novel single-molecule magnet [Mn12O12(OAc)(12)(dPP)(4)] (dppH = diphenyl phosphate) with no coordinating water molecules. The crystal structure analysis reveals that there are four five-coordinate Mn-III ions with Mn...H approaches. Addition of water in CD2Cl2 solution was monitored by H-1 NMR, which showed that H2O could coordinate to a vacant site of a five-coordinate Mn-III ion in solution. The measurements and analyses of magnetization hysteresis and ac magnetic susceptibility indicate that the title complex is a single-molecule magnet with a quantum tunneling behavior, whose ground state was tentatively assigned to S = 10 with g = 1.78 and D -0.60 K.
  • Syntheses, structures, and properties of intercalation compounds of silver(1) complex with [2.2]paracyclophane, M Munakata, SQ Liu, H Konaka, T Kuroda-Sowa, Y Suenaga, M Maekawa, H Nakagawa, Y Yamazaki, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 43(2), 633 - 641, Jan. 2004 , Refereed
    Summary:Reaction of [2.2]paracyclophane (pcp) with silver(l) trifluoroacetate (AgCF(3)CO(2)) and silver(l) pentafluoroproprionate (AgC(2)F(5)CO(2)) has led to isolation of three novel intercalation polymers: [Ag(4)(PCP)(CF(3)CO(2))(4)](C(6)H(6)) (1), [Ag(4)(pcp)(CF(3)CO(2))(4)](C(6)H(3)Me(3)) (2), and [Ag(4)(PCP)(C(2)F(5)CO(2))(4)](PCP) (3). Structure studies using single crystal X-ray diffraction have shown that all compounds contain two-dimensional layered frameworks based on cation-pi interactions, in which pcp exhibits an unprecedented mu-tetra-eta(2) Coordination mode. Guest molecules which weakly interact with the host pcp via C-H(...)pi interactions are intercalated between layers. The guest-eliminated complexes (1a and 2a) and guest-reincorporated ones (1b or 1c and 2b or 2c), accompanied by small structural changes, were confirmed by (1)H NMR, thermogravimetric analysis, mass spectra, and X-ray powder diffraction patterns. The structural changes from 1 --> 1a --> 1c (=11) can take place reversibly in the process of exposure of 1 a to benzene vapor, The original framework of complex 2 is also completely recovered by immersing 2a in mesitylene as well as exposing it to mesitylene vapor.
  • Two-dimensional silver(I) coordination polymer with twisted naphthalene rings, Y Suenaga, H Konaka, K Kitamura, T Kuroda-Sowa, M Maekawa, M Munakata, INORGANICA CHIMICA ACTA, INORGANICA CHIMICA ACTA, 351, 379 - 384, Jul. 2003
    Summary:The silver(I) complex of octakis(cyclohexylsulfanyl)-naphthalene (ochsn), [Ag-4(ochsn)(CF3COO)(4)](CH2Cl2) (1), has been prepared and its molecular structure was determined by X-ray crystallography. In 1, the silver ion prefers a tetrahedral coordination geometry comprised of two S atoms from the ochsn molecules and the two O atoms from the counter anion then producing two-dimensional sheet structure. Interestingly, the naphthalene ring in the complex has large deviations from planarity and end-to-end twists on the order of 35degrees. In contrast, the central naphthalene ring of ochsn shows almost a planar structure in the solid state. (C) 2003 Elsevier Science B.V. All rights reserved.
  • Crystal structure and photo-induced property of two-dimensional silver(I) complex with 1,3,5-tris(benzylsulfanyl)benzene, Y Suenaga, H Konaka, T Sugimoto, T Kuroda-Sowa, M Maekawa, M Munakata, INORGANIC CHEMISTRY COMMUNICATIONS, INORGANIC CHEMISTRY COMMUNICATIONS, 6(4), 389 - 393, Apr. 2003 , Refereed
    Summary:The silver(l) complex [Ag-2(3bsb)(2)(ClO4)(2)] (1) (3bsb; 1,3,5-tris(benzylsulfanyl)benzene) has been prepared and its molecular structure was determined by X-ray crystallography. In 1, the silver ion prefers a tetrahedral coordination geometry and produces a two-dimensional sheet structure containing dimeric units. Irradiation of this complex 1 with light changes its color from white to pink; heat or exposure to acetone vapor makes the irradiated sample revert back to white. However, only 3bsb has no characteristic like this photochromism. (C) 2003 Elsevier Science B.V. All rights reserved.
  • Syntheses and structures of photochromic silver(I) coordination polymers with cis-1,2-dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethene, H Konaka, LP Wu, M Munakata, T Kuroda-Sowa, M Maekawa, Y Suenaga, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 42(6), 1928 - 1934, Mar. 2003 , Refereed
    Summary:Five novel silver(l) coordination polymers with cis-1, 2-dicyano-1,2-bis(2,4,5-trimethyl-3-thienyl)ethene (cis-dbe) were synthesized and are characterized in this paper. Treatment of AgCF3SO3 or AgCF3CO2 with cis-dbe afforded [Ag-2(cis-dbe)(CF3SO3)(2)] (1) and [Ag2(cis-dbe)(CF3CO2)(2)] (2), and both complexes exhibit a 1-D infinite chain structure with two cyano groups and two thienyl groups of the ligand bridging four metal ions. Reaction of AgCnF2n+1CO2 with cis-dbe gave rise to an unprecedented cocrystallization of a 2-D sheet structure, [Ag-2(cis-dbe)(CnF2n+1CO2)(2)], where n = 2 (3), 3 (4), and 4 (5). Upon irradiation with 450 nm light, these five silver(l) complexes turned orange or red from yellow, and the color reverted to yellow on exposure to 560 nm light, indicative of the reversible cyclization/ring-opening reaction occurring in the crystalline phase. Furthermore, different anions gave not only the different structural dimensions but also the different photoresponsive patterns. The correlation between the crystal structures and the photochromic reactivity is discussed.
  • One-, two-dimensional silver(I) coordination polymer with poly(benzylsulfanyl)benzene and photo-induced property "jointly worked", Science and Technology / Kinki University (Annual Reports by Institute for Science and Technology, Kinki University), Science and Technology / Kinki University (Annual Reports by Institute for Science and Technology, Kinki University), (15), 25 - 33, 2003 , Refereed
  • A novel trinuclear palladium cluster compound : di-μ3-chloro-tris-[chloro (triphenylphosphine-P)palladium] acetone solvate (共著), Acta Crystallographica Sect. C, Acta Crystallographica Sect. C, C56, 414, 2000
  • Kinetic Studies on the Complexation of Ternary Copper(II) Complex with Glycine and 2,2'-Bipyridine in Mixed Solvent of Water and Ethanol "jointly worked", J. Fac. Sci. Technol. Kinki Univ., J. Fac. Sci. Technol. Kinki Univ., 30, 55, 1994
  • Building a Two-dimensional Co-ordination Polymer having a Multilayered Arragement. A Molecular Assembly comprising Hanging Phenazine Molecules between Polymeric Stair frameworks of Copper(I) Halides "jointly worked", J. Chem. Soc. Dalton Trans., J. Chem. Soc. Dalton Trans., 2771, 1994
  • Synthesis and Structure of Di-and Tetra-copper(I) Complexes bridged by Pyridazine "jointly worked", J. Chem. Soc. Dalton Trans., J. Chem. Soc. Dalton Trans., 603, 1994
  • Synthesis, Structures and Properties of Novel Copper(I) Complexes Bonding Through the Vinyl Group of Vinylferrocene "jointly worked", J. Fac. Sci. Technol. Kinki Univ., J. Fac. Sci. Technol. Kinki Univ., 29,31, 1993
  • Conference Activities & Talks

    • Structures and Magnetic Properties of Novel M(II) Triangular Tri-Nuclear Complexes with an S-Shaped Hexadentate Ligand derived from Phenazine, Takayoshi. Kuroda-Sowa, Ryotaro. Yamaguchi, Kunihisa. Sugimoto, Takashi. Okubo, Masahiko. Maekawa, The 41th International Conference on Coordination Chemistry (ICCC41),   2014 07 , The 41th International Conference on Coordination Chemistry
    • Structure and SMM property of Dy triple-decker complex with salophen, KURODA-SOWA Takayoshi, Takuma Hosokawa, Ryotaro Yamaguchi, Takashi Okubo, Masahiko Maekawa, The 14th International Conference on Molecule-Based Magnets(ICMM2014),   2014 07 , The 14th International Conference on Molecule-Based Magnets
    • A Novel 3-fold Interpenetrated Iron(II) Square-grid Framework with SCO Property, T. Kuroda-Sowa, T. Masuda, T. Okubo, M. Maekawa, International Conference on Molecule-based Magnets (ICMM2012),   2012 10 , International Conference on Molecule-based Magnets
    • A novel 3-fold interpenetrated iron(II) framework structure with SCO property, T. Kuroda-Sowa, T. Masuda, T. Okubo, M. Maekawa, The 40-th International Conference on Coordination Chemistry (ICCC40),   2012 09 , The 40-th International Conference on Coordination Chemistry
    • Structural controls of Cu(I) C2H4 coordination polymers of 4,4’-bipyrimidine, The 40th International Conference on Coordination Chemistry (ICCC40),   2012 09 , The 40th International Conference on Coordination Chemistry (ICCC40)
    • Novel mono- and dinuclear Iridium(III) hydride complexes of 2,2’-bipyrimidine, The 40th International Conference on Coordination Chemistry (ICCC40),   2012 09 , The 40th International Conference on Coordination Chemistry (ICCC40)
    • First Cu(I) coordination polymers of 4,4’-biquinazoline and the C2H4 adduct, The 40th International Conference on Coordination Chemistry (ICCC40),   2012 09 , The 40th International Conference on Coordination Chemistry (ICCC40)
    • Syntheses and properties of polynuclear Co complexes with bis(catecholate) ligand,   2011 09
    • Novel Cu(I) metallamacrocycles toward structurally and functionally new inorganic anion receptors, The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem 2010),   2010 12 , The 2010 International Chemical Congress of Pacific Basin Societies (Pacifichem 2010)
    • Synthesis and structures of novel Cu(I) ethylene complexes with a tetrazine anion radical ring,   2010 03
    • Synthesis of Cu(I) and Ag(I) Metallamacrocycles as Structurally and Functionally New Inorganic Anion Receptors, The second Asian Conference on Coordination Chemistry (2nd ACCC),   2009 11 , The second Asian Conference on Coordination Chemistry (2nd ACCC)
    • Novel Cu(I) Ethylene Complexes Three?Dimensionally Self?Assembled by an Intermolecular π?π Stacking Interaction and a C?H???N Contact, The second Asian Conference on Coordination Chemistry (2nd ACCC),   2009 11 , The second Asian Conference on Coordination Chemistry (2nd ACCC)
    • Self-assemblies of novel Cu(I) metallamacrocyclic carbonyl adducts by anion templation,   2009 03
    • Self-assemblies of novel Cu(I) metallamacrocyclic ethylene adducts by 4,4'-bipyrimidine derivatives,   2009 03
    • Self-assemblies of novel Cu(I) and Ag(I) coordination polymers by anion templation,   2008 03
    • Synthesis and characterization of metal-organic frameworks with Mn12 SMM’s as guests,   2007 09
    • The Redox Behavior of Binuclear Metal Complexes with Bis(catecholate) Ligand,   2007 03
    • Self-assembly of Cu(I) and Ag(I) metallocycles by anion templation,   2006 09
    • Syntheses and Properties of Binuclear Metal Complexes with Conjugated Bis(catecholate) Ligand.,   2006 09
    • Unique Ag(I) metallomacrocycles encapsulating a XF62- anion (X=Si, Ge and Sn) in the sandwich structure,   2006 03
    • Structures and Properties of Silver(I) Coordination Polymer with Benzylthioether Ligand,   2006 03
    • Two structural isomers of Mn12-benzoate induced by coexistence of one or two napy molecules, The 2005 International Chemical Congress of Pacific Basin Societies,   2005 12 , The 2005 International Chemical Congress of Pacific Basin Societies
    • Abrupt spin transition and LIESST phenomena observed in a Fe(II) complex with a N4O2 donor set, The 2005 International Chemical Congress of Pacific Basin Societies,   2005 12 , The 2005 International Chemical Congress of Pacific Basin Societies
    • Syntheses and structural characterization of novel mono- and dinuclear iridium hydrido complexes with polydentate nitrogen ligands, The 2005 International Chemical Congress of Pacific Basin Societies (Pacifichem2005),   2005 12 , The 2005 International Chemical Congress of Pacific Basin Societies (Pacifichem2005)
    • Effect of diphenylphosphate (dpp) substitution on the structure and magnetic properties of Mn12 SMMs, The 2005 International Chemical Congress of Pacific Basin Societies,   2005 12 , The 2005 International Chemical Congress of Pacific Basin Societies
    • 2-Dimensional Silver(I) Coordination Polymer with Twisted Naphthalene Rings,   2005 12
    • Syntheses and Properties of Co(III) Dinuclear Complexes with π Conjugated Biscatecholate Ligands,   2005 09
    • Syntheses and structures of rhodium and iridium complexes with polycyclic aromatic hydrocarbon ligands,   2005 03
    • A Novel Mn12 Single-Molecule Magnet [Mn12O12(OAc)12(dpp)4], IX th International Conference on Molecule-based Magnets,   2004 10 , IX th International Conference on Molecule-based Magnets
    • A Novel Mn12 Single-Molecule Magnet [Mn12O12(OAc)12(dpp)4], International Workshop on Single-Molecule Magnets and Single-Chain Magnets,   2004 10 , International Workshop on Single-Molecule Magnets and Single-Chain Magnets
    • Syntheses and structures of rhodium and iridium complexes with polycyclic aromatic hydrocarbon ligands,   2004 09
    • A Novel Mn12 Single-Molecule Magnet[Mn12O12(OAc)12(dpp)4] With No Coordinating Water Molecules, Microsymposium on New Dimensions in Metal Complex Assemblies -,   2004 08 , Microsymposium on New Dimensions in Metal Complex Assemblies -
    • Syntheses and crystal structures of novel rhodium and iridium complexes with [2.2]paracyclophane, The 36th International Conference on Coordination Chemistry,   2004 07 , The 36th International Conference on Coordination Chemistry
    • A Novel Mn12 Single-Molecule Magnet [Mn12O12(OAc)12(dpp)4], 36th International Conference on Coodination Chemistry,   2004 07 , 36th International Conference on Coodination Chemistry
    • Structure and Photochromism of Silver Ⅰ Complexes with Diarylethene Derivative having Two Pyridyl Groups,   2003 09
    • Synthesis and magnetic property of Mn12 Single-Molecule Magnets with phosphinate bridge,   2003 09
    • Synthesis and magnetic property of a novel Mn4 complex with coordination of 1,10-phenanthroline,   2003 09
    • Synthesis and magnetic property of a novel Mn12 complex partially substituted by 2.aminopyridine,   2003 09
    • Synthesis and magnetic property of Mn Ⅲ -phthalocyanate and its derivatives,   2003 09
    • Syntheses, Structures and Photochromic Behaviors of Silver Ⅰ Coordination Polymers with Ring-closed Diarylethene,   2003 09
    • Structure and Function of Silver Ⅰ Coordination Polymer with Aromatic Compounds,   2003 09
    • Synthesis, Structure and Property of Porous Copper Ⅰ Complexes,   2003 09
    • Synthesis and Structure of Porous Two-Dimensional CopperⅠComplexes with Dithiaparacyclophane,   2003 03
    • Mn12 Single.Molecule Magnets With Extended π.Conjugated Carboxylate Bridges,   2003 03
    • Structure and properties of silverⅠcoordination polymer with thiophenyl substituted aromatic compound,   2003 03
    • Synthesis of Photochromic Dinuclear RhodiumⅡComplexes with Bisthienyl Maleimide.,   2003 03
    • Sythesis and Magnetic Property of a Novel Mn12 Complex brigded by Methylenediphosphonic acid.,   2003 03
    • Structures and Magnetic properties of a neutral and anionic Mn12 complexes bridged by 2.thiophenecarboxylic acid,   2003 03
    • Structural characterization of novel iridium complexes with polydentate nitrogen ligands in solution and in the solid state,   2003 03
    • Novel Mn12 Single-Molecule Magnets With Methanesulfonate or Diphenyl-phosphate Bridges,   2002 10
    • Syntheses of silverⅠcoordination polymer with 1,4,5,8?tetrathioether group substituted naphthalene ligand,   2002 10
    • Structures and magnetic properties of nobel Mn12 single-molecule magnets with oxo bridges,   2002 10
    • Structure and photo-induced property of Silver(I) coordination polymer with benzyl groups,   2002 10
    • Structures and Photochromism of cis?1,2?Dicyano?1,2?bis(2,4,5?trimethyl?3?thienyl)ethene?Diruthenium(Ⅱ,Ⅲ)Complex,   2002 09
    • Syntheses and magnetic properties of iron complexes with extended π?conjugated Schiff-base ligands,   2002 09
    • Chemical modification of Mn12 single-molecule magnets for quantum computing,   2002 09
    • Syntheses, structures and reactivity of novel iridiumⅢhydrido complexes with multidentate nitrogen ligands,   2002 09
    • Syntheses and magnetic properties of Mn12 single-molecule magnets with Schiff-base ligands,   2002 09
    • Synthesis, crystal structure, and magnetic property of a novel Mn12 single-molecule magnet with diphenylphosphate bridges,   2002 09
    • Synthesis of Photochromic Metal Complex with 1,2?Bis[4?methyl?2?(2?pyridyl)?5?thiazolyl]perfluorocyclopentene,   2002 09
    • Structures and magnetic properties of Mn12 single-molecule magnets with extended π?conjugated carboxylic acids,   2002 09
    • Structures and magnetic properties of nobel Mn12 single-molecule magnets with oxo bridges,   2002 09
    • Synthesis and Structure of Porous CopperⅠComplexes with Dithi-aparacyclophane,   2002 09
    • Synthesis and structure of novel rhodium and iridium complex with [2. 2] paracyclophane,   2002 09
    • Syntheses and crystal structures of mononuclear [2. 2] paracyclophane com-plexes of rhodium and iridium supported by the pentamethylcyclopentadienyl ligand [M(η6?pcp)(η6?C5Me5)] (BF4)2 (M=Rh and Ir),   2002 07
    • Crstal structure and photo?induced property of one, two?dimensional silverⅠcomplexes with poly(benzylsulfanyl)benzene,   2002 07
    • A NOVEL Mn12 SINGLE-MOLECULE MAGNET WITH DIPHENYL-PHOSPHATE BRIDGES,   2002 07
    • Structuers and Physical Properties of Copper Iodine Mixed-metal Complex Polymers Bridged by Dithiocarbamate Complex,   2002 03
    • The magnetic property of Fe-complexes coordinated by Schiff base ligand with extended π system,   2002 03
    • Search for Ethylene Binding Protein as a Marker of Ag Ions,   2002 03
    • Structure and thermal transition behavior of tiophenyl substituted aromatic compound,   2002 03
    • Structure and Photochromism Dimolybdenum Complex and Dirhodium Complexes with cis 1, 2 Dicyano 1, 2 Bis (2, 4, 5 Trimethyl 3 Thienyl) Ethene,   2002 03
    • Magnetic property of Mn12 complexes bridged by carboxylates with extended π conjugated system,   2002 03
    • Efects of Metal Complexes and Antimicrobial Conpounds on Longevity of Cut-Gerbera Flowers,   2002 03
    • Synthesis of Photochromic Molybdenum Complexes with Bis (thienyl) maleimide,   2002 03
    • Structure and Magnetic Property of Novel Mn12 Nuclear Complex Partially Substituted by Diphenylphosphate,   2002 03
    • Structure and properties of copper complex with thiophenylether substituted aromatic ligands,   2002 03
    • Syntheses of metal complexes with star-burst molecule consisting of π electron system,   2002 03
    • Chemistry of Mn12 complexes,   2001 10
    • Physical propertis of Mn12 complexes with basic carboxylic bridges,   2001 09
    • Synthesis of Silver Complex Derived from 2, 3 Bis (2, 4, 5 trimethyl 3 thienyl) maleic anhydride,   2001 09
    • Synthesis and structure of silver coordination polymer with thiobenzylether group substituted aromatic compounds,   2001 09
    • Synthesis of Silver π Complexes with Diphenyl Derivatives,   2001 09
    • Syntheses and structures of novel iridium complexes with terphenyl,   2001 09
    • Synthesis and properties of copper coordination polymer with thiophenylether group substituted aromatic compounds,   2001 09
    • Syntheses and Structures of Cu Complex Polymers Bridged by Dithiolato Complexes,   2001 09
    • Synthesis and structure of novel rhodium and iridium complex with [2.2] paracyclophane,   2001 09
    • The Synthesis of 1 D Cu/Au Mixed Metal Complex Polymer,   2001 09
    • Structure and Photochromism of cis 1, 2 Dicyano 1, 2 bis (2, 4, 5 trimethyl 3 thienyl) ethene Dinuclear Molybdenum Complexes,   2001 09
    • Effect of Silver■ Complexes on Ethylene-Promoted Flower Blooming and Longevity ■ : Ethylene Activity Inhibition,   2001 03
    • Synthesis of Photochromic Silver ■ Complexes with Bisthienylmaleic Anhydride,   2001 03
    • Synthesis and Structure of Three Dimensional Silver ■ p Complexes with Biphenylene,   2001 03
    • Synthesis and structure of metal coordination polymer with trinaphthene derivatives,   2001 03
    • Syntheses and structures of rhodium and iridium paracyclophane complexes with Cp* as a support ligand,   2001 03
    • Optical and magnetic properties of a charge-transfer complex between a Mn12 single-molecule magnet and a TTF derivative,   2001 03
    • Triple-decker, Spiral and Herringbone Silver ■ Complexes of Benzopyrene and the Derivatives,   2001 03
    • Synthesis and structure of metal coordination polymer with piezochromism,   2001 02

    Misc

    • Novel Cu(I) ethylene complex with 6,6'-diphenyl-4,4'- bipyrimidine one-dimensionally self-assembled by an intermolecular π-π stacking interaction, Science and Technology, Kinki University, 22, 35, 40,   2010 03
    • Conversion of phenyl-substituted cyclopentadienes to pyrylium cations, GL Ning, Cheng, X, M Munakata, WT Gong, M Maekawa, T Kamikawa, JOURNAL OF ORGANIC CHEMISTRY, 69, 4, 1432, 1434,   2004 02 , 10.1021/jo030243k
      Summary:Phenyl-substituted cyclopentadienes are proved to form phenylated pyrylium cations in the presence of silver(l) perchlorate by insertion of an oxygen atom into the cyclopentadiene-ring. Three phenylated pyrylium compounds, [(Ph5C5O+)(ClO4-)](2)(CH2Cl2) (1), Ag(ClO4)(ClO4)(Ph4HC5O+) (ClO4-) (2), and (Ph3H2C5O+)(ClO4-) (3) have been synthesized and characterized. A possible reaction pathway and formation mechanism of the pyrylium cation are proposed and discussed.
    • Mn12 Single-Molecule Magnets and its Chemical Modification/Utility of FT-IR Method, 45, 2, 27, 32,   2003 09
    • Crystal Structure of 9,10-bis (phenylethynyl)anthracene (共著), Science and Technology / Kinki University, 12, 27,   2000
    • Crystal Structure of 3,6-bis(dimethylamino)acridine hydroperchloride(acridine orange・HClO4)(共著), Science and Technology / Kinki University, 11, 29,   1999
    • Synthesis and Crystal Structure of Bis(diphenylphosphino)methane Dipalladium(I) Complex with 2-Vinylpyridine(vpy). [Pd2(μ-dppm)2(vpy)Cl]ClO4(共著), Science and Technology / Kinki University, 9, 45,   1997
    • Solution and Solid State113CdNMR of Cadmium((]G0002[))Halogeno Complexes(共著), J.Fac.Sci.Technol.Kinki Univ., 31, 17,   1995

    Research Grants & Projects

    • Electronic Structures and Magnetic Properties of Multi-Nuclear Transition-Metal Complexes
    • Syntheses, Structures and Functions of Copper (I) Coordination Polymers