KINDAI UNIVERSITY


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FUJIHARA Hisashi

Profile

FacultyResearch Institute for Science and Technology
PositionVice President
Degree
Commentator Guidehttps://www.kindai.ac.jp/meikan/335-fujihara-hisashi.html
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Last Updated :2020/06/01

Education and Career

Academic & Professional Experience

  •   2009 ,  - 2014 , Faculty of Science and Engineering, Kindai University

Research Activities

Research Areas

  • Life sciences, Bioorganic chemistry
  • Nanotechnology/Materials, Structural/physical organic chemistry
  • Nanotechnology/Materials, Organic functional materials

Published Papers

  • Optically Active Linear and Hyperbranched Polythiophenes Bearing BINOL Derivatives Emitting Circularly Polarized Luminescence, Hara Nobuyuki, Okazaki Mamoru, Kitatobe Takumi, Tajima Nobuo, Shizuma Motohiro, Sudo Atsushi, Fujihara Hisashi, Fujiki Michiya, Imai Yoshitane, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 47(9), 1200 - 1202, Sep. 2018 , Refereed
  • Preparation, structure, and electrochemistry of porphyrinato titanium (IV) benzenedithiolates with a trithiole ring, a dithiin ring, and two 2-cyanoethylthio groups, Kimura Takeshi, Muraoka Yusuke, Amano Kaori, Fujio Toshiyuki, Nishikawa Takao, Nakahodo Tsukasa, Fujihara Hisashi, JOURNAL OF PORPHYRINS AND PHTHALOCYANINES, JOURNAL OF PORPHYRINS AND PHTHALOCYANINES, 22(1-3), 157 - 164, Jan. 2018 , Refereed
  • π-Conjugation between a Si=Si Double Bond and Thiophene Rings: Synthesis, Structural Characteristics, and Photophysical Properties of 1,2-Bis(thiophen-2-yl)disilene and 1,2-Bis(2,2'-bithiophen-5-yl)disilene, N. Hayakawa, S. Nishimura, N. Kazusa, N. Shintani, T. Nakahodo, H. Fujihara, M. Hoshino, D. Hashizume, T. Matsuo, Organometallics, Organometallics, 36, 3229 - 3236, 2017 , Refereed
  • Fabrication and Metal-enhanced Fluorescence of Plasmonic Hybrid Nanotubes Consisting of Polythiophene and Silver Nanoparticles, R. Yoshida, T. Matsumura, T. Nakahodo, H. Fujihara, Chemistry Letters, Chemistry Letters, 44, 135 - 137, 2015 , Refereed
  • Encapsulation of Gold Nanoparticles in Polythiophene Nanotubes Containing Chiral BINOL, Tsukasa Nakahodo, Daiki Kitano, Satoshi Tatsumi, Hisashi Fujihara, KOBUNSHI RONBUNSHU, KOBUNSHI RONBUNSHU, 71(12), 651 - 654, 2014 , Refereed
    Summary:We report the preparation of chiral polymer nanotubes bearing terthiophene and BINOL units [(S)-TBOH-PNTs] and the encapsulation of metal nanoparticles (NPs) therein. The monomer, (S)-TBOH, was synthesized by coventional methods and electrochemically polymerized using porous alumina with a pore diameter of 200 nm on a platinum electrode. The electrolyte solution contained 7mM monomer [(S)-TBOH] and 0.1M Bu4NPF6 in CH2Cl2. A voltage of 1.00 V was applied for polymerization. The porous alumina was removed by dissolving in NaOH. The UV-vis spectrum of the PNTs in C2HCl2 exhibited a broad absorption peak at 425 nm which is ascribed to the polythiophene. The CD spectra of (S)-TBOH-PNTs and (R)-TBOH-PNTs, show intense Cotton effects and a mirror-image relationship. The PNTs and the encapsulated Au NPs in PNTs (Au NPs@(S)-TBOH-PNTs) were characterized by SEM, TEM and EDX analysis.
  • Redox-active pi-conjugated polymer nanotubes with viologen for encapsulation and release of fluorescent dye in the nanospace, Keisuke Sato, Tsukasa Nakahodo, Hisashi Fujihara, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 47(36), 10067 - 10069, 2011 , Refereed
    Summary:We report the encapsulation of negatively charged Au nanoparticles and anionic fluorescent (FL) dye in the inner cavity of redox-active cationic polymer nanotubes with viologen via electrostatic interaction and the release of the FL dye from the FL dye confined in the cavity of the polymer nanotubes by electrochemical and chemical reduction.
  • [2+1] Cycloaddition of nitrene onto C60 revisited: interconversion between an aziridinofullerene and an azafulleroid, T. Nakahodo, M. Okada, H. Morita, T. Yoshimura, M. O. Ishitsuka, T. Tsuchiya, Y. Maeda, H. Fujihara, T. Akasaka, X. Gao, S. Nagase, Angew. Chem., Int. Ed., Angew. Chem., Int. Ed., 47, 1298 - 1300, 2008 , Refereed
  • Synthesis of selenylfullerene with selenium-containing dibenzo[b,g]cyclooctane moiety, T. Nakahodo, K. Takahashi, M. O. Ishitsuka, T. Tsuchiya, Y. Maeda, H. Fujihara, S. Nagase, T. Akasaka, Tetrahedron Lett., Tetrahedron Lett., 49, 2302 - 2305, 2008 , Refereed
  • Nanotube Composites Consisting of Metal Nanoparticles and Polythiophene from Electropolymerization of Terthiophene-Functionalized Metal (Au, Pd) Nanoparticles, R. Umeda, H. Awaji, T. Nakahodo, H. Fujihara, J. Am. Chem. Soc., J. Am. Chem. Soc., 130, 3240 - 3241, 2008 , Refereed
  • Asymmetric Suzuki-Miyaura coupling reactions catalyzed by chiral palladium nanoparticles at room temperature, K. Sawai, R. Tatumi, T. Nakahodo, H. Fujihara, Angew. Chem., Int. Ed., Angew. Chem., Int. Ed., 47, 6917 - 6919, 2008 , Refereed
  • Metal ion-mediated assembly of redox-active oligoethyleneoxy-functionalized gold nanoparticles and their immobilization on a metal electrode, Y. Satake, S. Wakatsuki, M. Watanabe, S. Ito, H. Fujihara, Shikizai Kyokaishi, Shikizai Kyokaishi, 78, 249 - 253, 2005 , Refereed
  • Electrochemical properties of redox-active tetrathiafulvalene and fullerene C60-functionalized gold nanoparticles, and their nanocomposite films-modified electrodes, Y. Satake, H. Nakai, S. Ito, H. Fujihara, Shikizai Kyokaishi, Shikizai Kyokaishi, 78, 507 - 513, 2005 , Refereed
  • Chiral bisphosphine BINAP-stabilized gold and palladium nanoparticles with small size and their palladium nanoparticle-catalyzed asymmetric reaction, M Tamura, H Fujihara, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 125(51), 15742 - 15743, Dec. 2003 , Refereed
    Summary:キラルビスホスフィンBINAP 修飾金・パラジウムナノ粒子の合成とキラルパラジウムナノ粒子が関与する新規な触媒的不斉反応について述べてある。(英文)
  • Preparation and electrochemical polymerization of new multifunctional pyrrolethiolate-stabilized gold and palladium nanoparticles, K Hata, H Fujihara, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 2002(22), 2714 - 2715, Nov. 2002 , Refereed
    Summary:New pyrrolylalkanethiolate-stabilized gold and palladium nanoparticles have been prepared: electrochemical polymerization of their metal nanoparticles and their TEMPO-derivatized metal nanoparticles gave the remarkably stable poly(pyrrole metal nanoparticle) films on metal electrodes.
  • Electrochemical Polymerization of Pyrrole-substituted Tetrathiafulvalenyl?thiol, sulfone, and disulfide, 藤原 尚, 土屋陽一, Electrochemistry, Electrochemistry, (70), 584 - 586, Aug. 2002 , Refereed
    Summary:ピロール置換テトラチアフルバレンーチオール、スルホンおよびジスルフィドの電解重合における電解重合膜の形成と電気化学的性質について報告した。(英文)
  • Fullerenethiolate-Functionalized Gold Nanoparticles: A New Class of Surface-Confined Metal C60 Nanocomposites, 藤原 尚, 中井英隆, Langmuir, Langmuir, 17(17), 6393 - 6395, 2001 , Refereed
    Summary:フラーレン C60 を含有する金ナノ粒子の合成に初めて成功した。 その金ナノ粒子は自己組織化法により安定なクラスター膜を金属表面上に形成する。 (英文)
  • Electropolymerization of Tetrathiol- and Tetrapyrrole Substituted Tetrathiafulvalene Derivatives and Electrochemical Properties of Their Electropolymerized Films, H. Nakai, Y. Tsuchiya, K. Watanabe, T. Matsushita, S. Ito, M. Yoshihara, H. Fujihara, Journal of the Japan Society of Colour Material, Journal of the Japan Society of Colour Material, 73, 176 - 181, 2000 , Refereed
  • Electrochemical properties of tetrathiafulvalenyl-thiol, disulfide, thioacetate, and sulfide, and their self-assembled monolayers on gold surfaces, H. Nakai, K. Watanabe, S. Ito, M. Yoshiihara, H. Fujihara, Shikizai Kyokaishi, Shikizai Kyokaishi, 73, 325 - 329, 2000 , Refereed
  • Alkane-tetrathiol induced formation of remarkably stable self-assembled monolayer and polymer films containing electroactive tetrathiafulvalene moieties on metal electrodes, H. Fujihara, H. Nakai, M. Yoshihara, T. Maeshima, Chem. Commun. (Cambridge), Chem. Commun. (Cambridge), 737 - 738, 1999 , Refereed
  • Magnesium oxide-catalyzed reaction of carbon dioxide with an epoxide with retention of stereochemistry, T. Yano, H. Matsui, T. Koike, H. Ishiguro, H. Fujihara, M. Yoshihara, T. Maeshima, Chem. Commun. (Cambridge), Chem. Commun. (Cambridge), 1129 - 1130, 1997 , Refereed
  • Preparation and crystal structure of a new tetracoordinated cyclic selenurane with two unsymmetrical apical ligands of oxygen and selenium: transannular hypercoordination between oxy- and diseleno-groups, H. Fujihara, T. Nakahodo, N. Furukawa, Chem. Commun. (Cambridge), Chem. Commun. (Cambridge), 311 - 312, 1996 , Refereed
  • New Chalcogenotelluroxides from 5H,7H-Dibenzo[b,g][1,5]-tellurazocine and Related Hypervalent Azatelluranes. The First Molecular Structure of a Selenotelluroxide, H. Fujihara, T. Uehara, N. Furukawa, J. Am. Chem. Soc., J. Am. Chem. Soc., 117, 6388 - 6389, 1995 , Refereed
  • First Isolation and Crystal Structure of Heavier Chalcogenenium Cations (RSe+, RTe+) Stabilized by Two Neighboring Amino Groups, H. Fujihara, H. Mima, N. Furukawa, J. Am. Chem. Soc., J. Am. Chem. Soc., 117, 10153 - 10154, 1995 , Refereed
  • Three-center selenium interaction in electrochemical oxidation of a linear trisselenide, 2,6-bis(phenylselenomethyl)phenyl phenyl selenide, and Se-monooxygenation from hydrolysis of its sulfuric acid solution, H. Fujihara, Y. Higuchi, H. Mima, N. Furukawa, Chem. Lett., Chem. Lett., 619 - 622, 1994 , Refereed
  • Hypervalent bond formation and interaction between heavier Group 16 elements in the dihalides and oxide of 5H,7H-dibenzo[b,g][1,5]ditellurocin and -telluraselenocin, H. Fujihara, T. Uehara, T. Erata, N. Furukawa, Chem. Lett., Chem. Lett., 2, 263 - 266, 1993 , Refereed
  • Preparation and reactivity of dichalocogenide (sulfur selenium) dication salts from medium-sized cyclic bis-sulfide and bis-selenides, H. Fujihara, R. Akaishi, N. Furukawa, Tetrahedron, Tetrahedron, 49, 1605 - 1618, 1993 , Refereed
  • A new tetracoordinated cyclic diazaselenurane with amino and ammonio groups as two unsymmetrical apical ligands and its bisammonioselenurane, H. Fujihara, H. Mima, T. Erata, N. Furukawa, J. Am. Chem. Soc., J. Am. Chem. Soc., 115, 9826 - 9827, 1993 , Refereed
  • Structures of sterically encumbered 1,9-bis(arylthio)dibenzothiophenes and detection of their dithia dications in concentrated sulfuric acid by proton NMR, T. Kimura, Y. Horie, S. Ogawa, H. Fujihara, F. Iwasaki, N. Furukawa, Heterocycles, Heterocycles, 33, 101 - 104, 1992 , Refereed
  • Disulfide dications from cyclic bis-sulfides, H. Fujihara, N. Furukawa, Rev. Heteroat. Chem., Rev. Heteroat. Chem., 6, 263 - 274, 1992 , Refereed
  • Migration of acetoxy group from tetracoordinated tellurium compound, 12,12-diacetoxy-5H,7H-dibenzo[b,g][1,5]tellurathiocin, induced by transannular tellurium-sulfur interaction, H. Fujihara, Y. Takaguchi, N. Furukawa, Chem. Lett., Chem. Lett., 501 - 502, 1992 , Refereed
  • Preparation and characterization of a four-coordinated ditellurane stabilized by a transannular tellurium-tellurium bond from 1,5-ditelluracyclooctane: a new multicenter hypervalent species, H. Fujihara, Y. Takaguchi, T. Ninoi, T. Erata, N. Furukawa, J. Chem. Soc., Perkin Trans. 1, J. Chem. Soc., Perkin Trans. 1, 2583 - 2584, 1992 , Refereed
  • Hypervalent selenurane with chalcogenium cation (selenium+, sulfur+) from 1,11-(methanoselenomethano)-5H,7H-dibenzo[b,g][1,5]diselenocin and its sulfur derivative: interconvertible redox structures by multicenter chalcogenide participation, H. Fujihara, H. Mima, T. Erata, N. Furukawa, J. Am. Chem. Soc., J. Am. Chem. Soc., 114, 3117 - 3118, 1992 , Refereed
  • Extremely facile ligand-exchange and disproportionation reactions of diaryl sulfoxides, selenoxides, and triarylphosphine oxides with organolithium and Grignard reagents. [Erratum to document cited in CA115(19):208047w], N. Furukawa, S. Ogawa, K. Matsumura, H. Fujihara, J. Org. Chem., J. Org. Chem., 57, 5802 - 5802, 1992 , Refereed
  • Ligand exchange reactions of aryl pyridyl sulfoxides with Grignard reagents: convenient preparation of 3- and 4-pyridyl Grignard reagents and examination of the leaving abilities of pyridyl anions, T. Shibutani, H. Fujihara, N. Furukawa, S. Oae, Heteroat. Chem., Heteroat. Chem., 2, 521 - 531, 1991 , Refereed
  • A new preparative method and reactivity of diselenide dication salt from 5H,7H-dibenzo[b,g][1,5]diselenocine, H. Fujihara, Y. Ueno, J. J. Chiu, N. Furukawa, J. Chem. Soc., Chem. Commun., J. Chem. Soc., Chem. Commun., 1052 - 1053, 1991 , Refereed
  • Transannular selenium-selenium interaction in electrochemical oxidation of 5H,7H-dibenzo[b,g]p1,5]diselenocin and formation of its diselena dication in concentrated sulfuric acid, H. Fujihara, Y. Ueno, J. J. Chiu, N. Furukawa, Chem. Lett., Chem. Lett., 1649 - 1650, 1991 , Refereed
  • First example of tetraalkyl substituted ditelluride dication salt from 1,5-ditelluracyclooctane, H. Fujihara, T. Ninoi, R. Akaishi, T. Erata, N. Furukawa, Tetrahedron Lett., Tetrahedron Lett., 32, 4537 - 4540, 1991 , Refereed
  • New hypervalent σ-selenanes with a transannular selenium-nitrogen bond from N-methyl-5H,7H-dibenzo[b,g][1,5]selenazocine, H. Fujihara, H. Mima, M. Ikemori, N. Furukawa, J. Am. Chem. Soc., J. Am. Chem. Soc., 113, 6337 - 6338, 1991 , Refereed
  • Studies on the stereoselective methylation of α-sulfinyl carbanions generated from three isomeric pyridylmethyl p-tolyl sulfoxides and benzyl 2-pyridyl sulfoxide, N. Furukawa, E. Hosono, H. Fujihara, S. Ogawa, Bull. Chem. Soc. Jpn., Bull. Chem. Soc. Jpn., 63, 461 - 465, 1990 , Refereed
  • A novel redox reaction of the disulphide dication salt (R2S+?+SR2?2X?) with carbanions and alkoxides, H. Fujihara, R. Akaishi, N. Furukawa, J. Chem. Soc., Chem. Commun., J. Chem. Soc., Chem. Commun., 147 - 148, 1989 , Refereed
  • Generation of sulfenate salts via ipso-substitution of azaheterocyclic sulfoxides. First preparation and characterization of sodium 2-pyridinesulfenate, N. Furukawa, Y. Konno, M. Tsuruoka, H. Fujihara, S. Ogawa, Chem. Lett., Chem. Lett., 1501 - 1504, 1989 , Refereed
  • 1,5-Diselenacyclooctane: synthesis and the first isolation of the diselenide hexafluorophosphate salt of [R2Se+Se+R2], H. Fujihara, R. Akaishi, T. Erata, N. Furukawa, J. Chem. Soc., Chem. Commun., J. Chem. Soc., Chem. Commun., 1789 - 1790, 1989 , Refereed
  • A NEW DOUBLE-BOND BRIDGED DIBENZODITHIOCIN - PREPARATION, CHARACTERIZATION, AND ITS TRANS-ANNULAR P-PI-(GREATER-THAN-S+-S+-LESS-THAN) INTERACTION, H FUJIHARA, JJ CHIU, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 30(21), 2805 - 2808, 1989 , Refereed
  • PREPARATION OF BIPYRIDYL DERIVATIVES VIA ALPHA-LITHIATION OF PYRIDYL PHENYL SULFOXIDES, SUBSTITUTION WITH ELECTROPHILES AND CROSS-COUPLING REACTIONS WITH GRIGNARD-REAGENTS, N FURUKAWA, T SHIBUTANI, H FUJIHARA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 30(50), 7091 - 7094, 1989 , Refereed
  • Synthesis of a new type of quadruply ortho-bridged biphenyl compounds with disulfide linkage, and its sulfur extrusion in concentrated sulfuric acid and photochemical condition, H. Fujihara, J. J. Chiu, N. Furukawa, Tetrahedron Lett., Tetrahedron Lett., 30, 7441 - 7444, 1989 , Refereed
  • A new rigid sulfur-bridged dithiametacyclophane and its acyclic analogs: direct observation of the transannular bond formation between the three sulfur atoms and isolation of dicationic salts, H. Fujihara, J. J. Chiu, N. Furukawa, J. Am. Chem. Soc., J. Am. Chem. Soc., 110, 1280 - 1284, 1988 , Refereed
  • The crystal structure of 1,5-dithioniabicyclo[3.3.0]octane bis(trifluoromethanesulfonate). The first structural characterization of dithionia dication and strong sulfur-oxygen interactions between cations and anions, F. Iwasaki, N. Toyoda, R. Akaishi, H. Fujihara, N. Furukawa, Bull. Chem. Soc. Jpn., Bull. Chem. Soc. Jpn., 61, 2563 - 2567, 1988 , Refereed
  • Remote Pummerer reactions of cyclic and acyclic bis-sulfide monosulfoxides with acetic anhydride, H. Fujihara, J. J. Chiu, N. Furukawa, J. Chem. Res., Synop., J. Chem. Res., Synop., 204 - 205, 1987 , Refereed
  • Synthesis and phase-transfer properties of macrocyclic polythia ether sulfoxides, H. Fujihara, K. Imaoka, N. Furukawa, S. Oae, J. Chem. Soc., Perkin Trans. 1, J. Chem. Soc., Perkin Trans. 1, 465 - 470, 1986 , Refereed
  • TRANSITION-STATE STRUCTURAL FEATURES FOR ANILIDE HYDROLYSIS FROM BETA-DEUTERIUM ISOTOPE EFFECTS, RL STEIN, H FUJIHARA, DM QUINN, G FISCHER, G KULLERTZ, A BARTH, RL SCHOWEN, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 106(5), 1457 - 1461, 1984 , Refereed
  • Facile, economical synthesis of L-[α-2H]-α-amino acids, H. Fujihara, R. L. Schowen, J. Org. Chem., J. Org. Chem., 49, 2819 - 2820, 1984 , Refereed
  • Effect of solvent on the radical copolymerizability of styrene with 3(2-methyl)-6-methylpyridazinone, J. Asakura, S. Kawabata, H. Fujihara, Y. Matsubara, M. Yoshihara, T. Maeshima, J. Macromol. Sci., Chem., J. Macromol. Sci., Chem., A18, 1045 - 1054, 1982 , Refereed
  • Polysulfoxides as a new type of phase transfer catalysts in two phase alkylation, N. Furukawa, K. Imaoka, H. Fujihara, S. Oae, Chem. Lett., Chem. Lett., 1421 - 1424, 1982 , Refereed
  • Utilization of sulfoxides containing pyridine nuclei as a new type of phase transfer catalysts. IV, N. Furukawa, S. Ogawa, T. Kawai, K. Kishimoto, H. Fujihara, S. Oae, Heterocycles, Heterocycles, 19, 2041 - 2046, 1982 , Refereed
  • Utilization of sulfoxides containing pyridine nuclei as phase transfer catalysts. III, N. Furukawa, S. Ogawa, T. Kawai, K. Kishimoto, H. Fujihara, S. Oae, Heterocycles, Heterocycles, 16, 1927 - 1932, 1981 , Refereed
  • Organic sulfur compounds containing heterocycles. II. Methyl 2-pyridyl sulfoxide as phase transfer catalyst, N. Furukawa, K. Kishimoto, S. Ogawa, T. Kawai, H. Fujihara, S. Oae, Tetrahedron Lett., Tetrahedron Lett., 22, 4409 - 4412, 1981 , Refereed
  • Enantioface-Differentiation in Free Radical Addition of Thiolacetic Acid to (Z)-2-Octene in the Presence of Chiral Substances, M. Yoshihara, H. Fujihara, A. Yoneda, T. Maeshima, Chemistry Letters, Chemistry Letters, 9, 39 - 40, 1980 , Refereed
  • Asymmetric induction in free radical addition of thiols to l-menthyl crotonate, M. Yoshihara, H. Fujihara, T. Maeshima, Chem. Lett., Chem. Lett., 195 - 196, 1980 , Refereed
  • Asymmetric induction in free radical addition reaction of l-menthyl mercaptoacetate to olefins, M. Yoshihara, H. Fujihara, T. Maeshima, Chem. Ind. (London), Chem. Ind. (London), 201 - 202, 1980 , Refereed
  • Asymmetric induction in free radical addition reaction to 2-octene in l-menthol, H. Fujihara, M. Yoshihara, T. Maeshima, J. Polym. Sci., Polym. Lett. Ed., J. Polym. Sci., Polym. Lett. Ed., 18, 287 - 290, 1980 , Refereed
  • Solvent effects in radical copolymerization of styrene with N,N-dimethylacrylamide, H. Fujihara, M. Yoshihara, T. Maeshima, J. Macromol. Sci., Chem., J. Macromol. Sci., Chem., A14, 867 - 877, 1980 , Refereed
  • Solvent effects on the radical copolymerizabilities of styrene with p-substituted N,N-diethylcinnamamides and of p-substituted styrenes with methyl vinyl sulfoxide, H. Fujihara, T. Shindo, M. Yoshihara, T. Maeshima, J. Macromol. Sci., Chem., J. Macromol. Sci., Chem., A14, 1029 - 1034, 1980 , Refereed
  • Asymmetric induction by the radical copolymerization of styrene with maleic anhydride in l-menthol, H. Fujihara, K. Yamazaki, M. Yoshihara, T. Maeshima, J. Polym. Sci., Polym. Lett. Ed., J. Polym. Sci., Polym. Lett. Ed., 17, 507 - 509, 1979 , Refereed
  • Radical copolymerization of 3(2-methyl)-6-methylpyridazinone with styrene in several substituted acetic acids, H. Fujihara, M. Yoshihara, Y. Matsubara, T. Maeshima, J. Macromol. Sci., Chem., J. Macromol. Sci., Chem., 13, 789 - 796, 1979 , Refereed
  • Radical copolymerization of methyl methacrylate with styrene in several solvents, H. Fujihara, K. Yamazaki, Y. Matsubara, M. Yoshihara, T. Maeshima, J. Macromol. Sci., Chem., J. Macromol. Sci., Chem., 13, 1081 - 1088, 1979 , Refereed
  • Chiral Copper(0) Nanoparticles: Direct Synthesis and Interfacial Chiral Induction via Phase Transfer of Copper Nanoparticles, Yu Imanaka, Tsukasa Nakahodo, Hisashi Fujihara, CHEMISTRYSELECT, CHEMISTRYSELECT, 2(21), 5806 - 5809, Jul. 2017 , Refereed
    Summary:No clear-cut example has been hitherto known for the phase transfer involving the ligand exchange of copper nanoparticles (NPs) from an aqueous phase into an organic phase, and chiral copper NPs. We present the first isolation of chiral copper(0) NPs prepared by either the reduction of copper ions with hydrazine in the presence of a new chiral binaphthyl carboxylic acid 1 as a protective ligand in an organic solvent or the two-phase transfer involving the chiral ligand exchange of the polyvinyl pyrrolidone-protected copper NPs from the water phase to organic phase in the presence of the chiral protective ligand 1. This is the first example for the asymmetric (chiral) induction on the surface of the copper NPs by two-phase transfer of the achiral copper NPs.
  • Synthesis of TiO2-Polythiophene Hybrid Nanotubes and Their Porphyrin Composites, Noritaka Takeuchi, Shoji Tazawa, Kimihiro Matsukawa, Yoshiyuki Sugahara, Tsukasa Nakahodo, Hisashi Fujihara, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 46(3), 354 - 356, Mar. 2017 , Refereed
    Summary:Template-based electropolymerization of terthienyl-carboxylate-protected TiO2 nanoparticles (1-TiO2 NPs) in a tracketched membrane template produced the corresponding hybrid nanotubes (NTs) of the TiO2 NPs and polythiophene. New multicomponent hybrid NTs consisting of TiO2 NPs, polythiophene, and porphyrin can be synthesized.
  • Remarkably Stable S-Oxides of Calix[4]thiophenes and Their Sulfonium Ylide from Reaction of S-Oxide with Acetylene Derivative, Noritaka Takeuchi, Tsukasa Nakahodo, Hisashi Fujihara, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 46(3), 389 - 391, Mar. 2017 , Refereed
    Summary:The oxidation of macrocyclic thiophenes, such as the calix[4] thiophenes, with m-chloroperbenzoic acid in the presence of BF3 center dot OEt2 afforded the remarkably stable mono-and bis-S-oxides based on their X-ray crystal structures. The stable monoS- oxide of the calix[4] thiophene reacted with dimethyl acetylenedicarboxylate at 160(circle)C to form the thiophene-S, C-sulfonium ylide, indicating that the cycloaddition reaction did not occur.
  • SYNTHESIS OF PORPHYRIN-POLYTHIOPHENE NANOTUBES AND THEIR ZINC COMPLEX AND SILVER NANOPARTICLE COMPOSITES, Noritaka Takeuchi, Saya Ueda, Tsukasa Nakahodo, Hisashi Fujihara, HETEROCYCLES, HETEROCYCLES, 95(2), 768 - 774, Jan. 2017 , Refereed
    Summary:The template-based electropolymerization of terthienyl-porphyrin, 1, and its zinc porphyrin, Zn-1, in a nanoporous alumina template produced the corresponding new porphyrin nanotubes, poly-1 NTs and poly-Zn-1 NTs, respectively. The encapsulation of silver nanoparticles into the inner cavity of the poly-1 NTs provides the silver nanoparticle-porphyrin hybrid NTs.
  • Preparation, optical and electrochemical properties, and molecular orbital calculations of tetraazaporphyrinato ruthenium (II) bis(4-methylpyridine) fused with one to four diphenylthiophene units, Takeshi Kimura, Naoko Murakami, Eiichi Suzuki, Taniyuki Furuyama, Tsukasa Nakahodo, Hisashi Fujihara, Nagao Kobayashi, JOURNAL OF INORGANIC BIOCHEMISTRY, JOURNAL OF INORGANIC BIOCHEMISTRY, 158, 35 - 44, May 2016 , Refereed
    Summary:2,5-Diphenyl-3,4-dicyanothiophene (1) and phthalonitrile (2) were mixed and treated with ruthenium (III) trichloride, 4-methylpyridine, and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) in 2-ethoxyethanol at 135 degrees C, to produce low-symmetrical tetraazaporphyrins (TAPs) (3), (4), (5), and (6) with one to three thiophene rings. Two thiophene-annelated tetraazaporphyrins were isolated as opposite and adjacent isomers 4 and 5. The structure of 3 was determined by X-ray crystallography, showing that the thiophene ring linked at the 3,4-positions on the tetraazaporphyrin scaffold deviates from the mean plane of the four central pyrrole nitrogen atoms (N1-N3-N5-N7). Optical and electrochemical properties of the products were examined by UV-vis and magnetic circular dichroism (MCD) spectroscopy, together with cyclic voltammetry. In the H-1 NMR spectra, the signals of 4-methylpyridine coordinating to the central ruthenium atom appeared at a higher magnetic field than those of uncoordinated 4-methylpyridine itself due to the shielding effect of the TAP ring. Increasing the number of fused thiophene rings resulted in 1) lower magnetic field shifts of the signals of axially coordinated 4-methylpyridine in the H-1 NMR spectra, 2) lower energy shifts of the Q band absorption in the UV-vis spectra, and 3) decreasing (cathodic shift) of the first oxidation potentials. The structures of simplified model compounds were optimized using the DFT method with the Gaussian 09 program at the B3LYP/LANL2DZ level for the Ru atom and the B3LYP/6-31G (d, p) level for the C, H, N, and S atoms. The optimized structures were utilized to calculate the NMR shielding constants, the HOMO and LUMO orbital energies, and the electronic absorption spectra. (C) 2016 Elsevier Inc. All rights reserved.
  • Chiral metal nanoparticles encapsulated by a chiral phosphine cavitand with the tetrakis-BINAP moiety: their remarkable stability toward ligand exchange and thermal racemization, Ryo Nishimura, Ryo Yasutake, Shota Yamada, Koji Sawai, Kazuki Noura, Tsukasa Nakahodo, Hisashi Fujihara, DALTON TRANSACTIONS, DALTON TRANSACTIONS, 45(11), 4486 - 4490, 2016 , Refereed
    Summary:A chiral phosphine cavitand 1 induced the formation of chiral metal (Ru, Rh, Pd, Ag, Pt, and Au) nanoparticles (NPs). The ligand 1 of the chiral metal NPs prevents both thermal racemization and ligand exchange with a thiol, but the organic molecules can react with the metal surfaces. In contrast to the 1-protected Au NPs, the BINAP-protected Au NPs easily undergo ligand exchange and thermal racemization with aggregation.
  • 4,5-Dicyano-3,6-diethylbenzo-1,2-diselenete, a Highly Stable 1,2-Diselenete: Its Preparation, Structural Characterization, Calculated Molecular Orbitals, and Complexation with Tetrakis(triphenylphosphine)palladium, Takeshi Kimura, Tsukasa Nakahodo, Hisashi Fujihara, Eiichi Suzuki, INORGANIC CHEMISTRY, INORGANIC CHEMISTRY, 53(9), 4411 - 4417, May 2014 , Refereed
    Summary:The first isolable benzo-1,2-diselenete, 4,5-dicyano-3,6-diethylbenzo-1,2-diselenete (4), was prepared by the reaction of 4,5-(oxylylenediseleno)-3,6-diethylphthalonitrile (3) with aluminum chloride in toluene. X-ray crystallographic analysis demonstrated that 4 contains a trapezoidal diselenide ring rather than a benzo-1,2-diselenone structure. In crystal form, 4 undergoes self-assembly and generates structures based on layered molecular sheets since the unit cell contains only one molecule. While the cyclic voltammogram of 4 exhibited only one irreversible peak (E-p = 1.59 V) during quasireversible couples during reduction, three peaks were observed in the differential pulse voltarnmogram of the reduction couples (E-1/2 = -1.19, -0.75, and -0.69 V). Although a THF solution of 4 in the presence of sodium metal was EPR silent, various signals were readily observed in its H-1, C-13, and Se-77 NMR spectra. Molecular orbital calculations for 4 demonstrated that the HOMO orbital is primarily localized at the two selenium atoms and four of the benzene carbon atoms while the LUMO orbital is situated solely on the diselenete ring. It appears that the HOMO and LUMO orbitals of 4 receive significant stabilization from the nitrile groups compared to the level of stabilization in the unsubstituted benzo-1,2-diselenete (BDS). The reaction of 4 with tetrakis(triphenylphosphine)palladium in benzene was found to produce a dinuclear palladium complex (8), and the structure of this complex was determined by X-ray crystallographic analysis. The central four membered ring of 8 consists of the Pd1, Se2, Pd2, and Se3 atoms and is not planar but rather adopts a folded arrangement.
  • SYNTHESIS AND PROPERTIES OF CONDUCTING POLYMER NANOTUBES WITH REDOX-ACTIVE TETRATHIAFULVALENE, Shinya Nambu, Tsukasa Nakahodo, Hisashi Fujihara, HETEROCYCLES, HETEROCYCLES, 88(2), 1633 - 1638, Jan. 2014 , Refereed
    Summary:Electropolymerization of a new chiral (S)-binaphthyltetrathiafulvalenyl-terthiophene, 1-TTF, produced the corresponding polymer films on an electrode surface. The polymer nanotubes consisting of the tetrathiafulvalene and polythiophene were synthesized from the template-based electropolymerization of 1-TTF in a nanoporous alumina template.
  • Plasmonic hybrid nanotubes of fullerene C-60-polythiophene-silver or gold nanoparticles: fabrication and enhancement of the Raman scattering, Ryusuke Yoshida, Takuya Matsumura, Tsukasa Nakahodo, Hisashi Fujihara, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 50(96), 15183 - 15186, 2014 , Refereed
    Summary:We determined the surface-enhanced Raman scattering of the plasmonic hybrid nanotubes of fullerene C-60-polythiophene-Ag or Au nanoparticles (NPs) which were synthesized via the template-based electrocopolymerization of terthiophene-linked fullerene C-60 and terthiophene-modified Ag NPs or Au NPs using a nanoporous alumina membrane as the template. The combination of plasmonic activity and chemical stability may allow for a variety of new applications.
  • Synthesis of Anionic Sulfonate-functionalized Conducting Polymer Nanotubes and Selective Confinement of Cationic Gold Nanoparticles in Their Inner Cavities via Electrostatic Interaction, Nobuyuki Fujimoto, Tsukasa Nakahodo, Hisashi Fujihara, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 42(11), 1394 - 1396, Nov. 2013 , Refereed
    Summary:New sulfonate-functionalized conducting polythiophene nanotubes were synthesized and easily dispersed in water without them aggregating. The positively charged Au nanoparticles with viologen were selectively attached to the inner surfaces of their negatively charged polythiophene nanotubes via an interfacial electrostatic interaction.
  • A NEW MAGNETIC NANOPEAPOD: ENCAPSULATION OF MAGNETITE NANOPARTICLES IN POLYTHIOPHENE NANOTUBES, Tsukasa Nakahodo, Katsuya Yamamoto, Hisashi Fujihara, HETEROCYCLES, HETEROCYCLES, 86(2), 973 - 977, Dec. 2012 , Refereed
    Summary:Template-based electropolymerization of cyclohexanedioxythiophene (CDOT) gave the corresponding polythiophene nanotubes (PNTs). A new hybrid polymer nanopeapod was constructed by introducing magnetite nanoparticles into the CDOT PNTs.
  • Enhanced Catalytic Activity in Suzuki-Miyaura Couplings by Shell Crosslinked Pd Nanoparticles from Alkene-terminated Phosphine Dendron-stabilized Pd Nanoparticles, Toshiaki Shiomi, Tsukasa Nakahodo, Hisashi Fujihara, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 41(12), 1700 - 1702, Dec. 2012 , Refereed
    Summary:New alkene-terminated phosphine dendron-protected palladium nanoparticles (NPs) have been synthesized, and the olefin metathesis polymerization of their Pd NPs led to shell crosslinked Pd NPs without aggregation of the Pd NPs. The introduction of crosslinking at the surface of the protective ligand enhanced the catalytic activity of the Pd NPs for Suzuki-Miyaura couplings.
  • Synthesis of chiral hybrid nanotubes of magnetite nanoparticles and conducting polymers, Masashi Mitsumori, Tsukasa Nakahodo, Hisashi Fujihara, NANOSCALE, NANOSCALE, 4(1), 117 - 119, 2012 , Refereed
    Summary:New chiral magnetite nanoparticles with a polymerizable group produced polymer composite films on an electrode surface and the hybrid nanotubes of magnetite nanoparticles and polythiophene from their template-based electropolymerization.
  • Synthesis of heterosegment-junctioned hybrid nanotubes of polythiophene and heterometallic nanoparticles by sequential template-based electropolymerization, Hiroshi Awaji, Tsukasa Nakahodo, Hisashi Fujihara, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, 47(12), 3547 - 3549, 2011 , Refereed
    Summary:New heterosegment-junctioned hybrid nanotubes of polythiophene and heterometallic nanoparticles (Pd, Au NPs) have been synthesized by sequential electropolymerization of terthiophene-modified Pd and Au NPs in a nanoporous template.
  • WATER-SOLUBLE PALLADIUM AND GOLD NANOPARTICLES FUNCTIONALIZED BY A NEW PHOSPHINE WITH ZWITTERIONIC LIQUID BASED ON IMIDAZOLIUM SULFONATE LINKED ETHYLENE GLYCOL MOIETY, Taichi Akiyama, Chiharu Ibata, Hisashi Fujihara, HETEROCYCLES, HETEROCYCLES, 80(2), 925 - 931, Mar. 2010 , Refereed
    Summary:A new phosphine with zwitterionic liquid based on imidazolium sulfonate linked ethylene glycol moiety (1) as a protective ligand for metal nanoparticles has been prepared. Its phosphine 1-stabilized palladium and gold nanoparticles (1-Pd and 1-Au) were found to be soluble in water, and remarkably stable in high concentration of aqueous electrolyte and ionic liquid. 1-Pd nanoparticles behave as an efficient catalyst for the Suzuki cross-coupling reaction in an aqueous medium.
  • Self-Organization of Silsesquioxane-Modified Gold Nanoparticles and Immobilization of Their Polythiophene Nanocomposite Films onto Electrode Surface, Daisuke Imai, Yuh Satake, Kazuki Noura, Tsukasa Nakahodo, Hisashi Fujihara, PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, 185(5-6), 1206 - 1213, 2010 , Refereed
    Summary:The reduction of tetrachloroaurate with sodium borohydride in the presence of mercaptopropyl-isobutyl-polyhedral oligomeric silsesquioxane (POSS) (1) gave the stable POSS-functionalized gold nanoparticles (POSS-Au). Transmission electron microscopy (TEM) investigation of POSS-Au showed the self-organization of two-dimensional hexagonal packing with a core size of 5.4 nm. The ligand-exchange reaction of POSS-Au with a terthienyldecanethiol (2) having polymerization site led to the new nanocomposite (POSS-TP-Au, core size 4.1 nm), which exhibited a characteristic band at 350 nm due to the terthiophene and a plasmon resonance at 520 nm in the UV-vis spectrum. The novel polythiophene-POSS-Au nanocomposite films were immobilized on metal electrode by electropolymerization of POSS-TP-Au.
  • Preparation, Characterization, and Electrochemical Properties of Selenylfullerenes, Tsukasa Nakahodo, Kensaku Takahashi, Midori O. Ishitsuka, Takahiro Tsuchiya, Yutaka Maeda, Hisashi Fujihara, Shigeru Nagase, Takeshi Akasaka, PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, 184(6), 1523 - 1540, 2009 , Refereed
    Summary:The photochemical reaction of C(60) with selenium-containing bicyclooctanes affords for the first time the selenylfullerenes, which were characterized by mass, UV-vis absorption, and NMR spectroscopic and X-ray crystallographic analyses.
  • Assembly of gold nanoparticles by quadruple hydrogen-bonded ureidopyrimidinone-thiol dimer as a new type of crosslinker, Yasushi Kido, Hisashi Fujihara, CHEMISTRY LETTERS, CHEMISTRY LETTERS, 35(11), 1260 - 1261, Nov. 2006 , Refereed
    Summary:Quadruple hydrogen-bonded networks between gold nanoparticles and a new ureidopyrimidinone-thiol 1 were constructed and the remarkably stable layered films of redox-active gold nanoparticles crosslinked by 1 were formed on a gold electrode.
  • Chiroptical activity of BINAP-stabilized undecagold clusters, Y Yanagimoto, Y Negishi, H Fujihara, T Tsukuda, JOURNAL OF PHYSICAL CHEMISTRY B, JOURNAL OF PHYSICAL CHEMISTRY B, 110(24), 11611 - 11614, Jun. 2006 , Refereed
    Summary:Undecagold cluster compounds [Au-11(BINAP)(4)X-2](+) ( X = Cl and Br) were synthesized by chemical reduction of the corresponding precursor complexes, Au2X2( BINAP), where BINAP represents the bidentate phosphine ligand 2,2'-bis(diphenylphosphino)- 1,1'-binaphthyl. The circular dichroism spectra of Au-11 stabilized by the enantiomers [Au-11(R-BINAP)(4)X-2](+) and [Au-11(S-BINAP)(4)X-2](+) exhibited intense and mirror-image Cotton effect, whereas those of Au-11(3+) clusters stabilized by achiral monodentate phosphine ligands did not. The origin of the chiroptical activity of [Au-11(BINAP)(4)X-2](+) is discussed in the context of the structural deformation of the Au-11(3+) core.
  • Dendritic effects on the ordered assembly and the interfacial one-electron oxidation of redox-active dendron-functionalized gold nanoparticles, Y Komine, Ueda, I, T Goto, H Fujihara, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, (3), 302 - 304, Jan. 2006 , Refereed
    Summary:A higher generation dendron with a long-alkyl chain thiol (DA2-SH) induced the formation of nanoparticles with a small core with quite a narrow size distribution (1.5 +/- 0.1 nm), the self-assembly of one-dimensional arrays of these gold nanoparticles (DA2-Au), and the stabilization for the formation of the radical cation of the phenothiazine of DA2-Au nanoparticles from the interfacial one-electron oxidation of the nanoparticles with NOBF4.
  • Synthesis of small palladium nanoparticles stabilized by bisphosphine BINAP bearing an alkyl chain and their palladium nanoparticle catalyzed carbon-carbon coupling reactions under room-temperature, Ryouta Tatumi, Tomoki Akita, Hisashi Fujihara, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, (31), 3349 - 3351, 2006 , Refereed
    Summary:A new bisphosphine ligand, C-8-BINAP, and C-8-BINAP-stabilized palladium nanoparticles have been prepared; C-8-BINAP was found to be an effective protecting ligand for preparing and stabilizing palladium nanoparticles with very small core size and narrow size distribution and the C-8-BINAP - Pd nanoparticles behave as an efficient catalyst for carbon - carbon coupling reactions at room temperature.
  • New method for facile synthesis of amphiphilic thiol-stabilized ruthenium nanoparticles and their redox-active ruthenium nanocomposite, T Tsukatani, H Fujihara, LANGMUIR, LANGMUIR, 21(26), 12093 - 12095, Dec. 2005 , Refereed
    Summary:The one-phase reduction of RuCl3 with lithium triethylborohydride as a reductant in tetrahydrofuran in the presence of 1-octanethiol, 1-octadecanethiol, 1,1'-binaphthalene-2,2'-dithiol, or oligoethyleneoxythiol gave organic solvent- and water-soluble thiol-stabilized ruthenium nanoparticles. The oligoethyleneoxythiol-stabilized ruthenium nanoparticles were soluble in both water and organic solvents. The ruthenium nanoparticles were stable in the solid state and did not aggregate in solution. Transmission electron microscope images of the ruthenium nanoparticles reveal small dispersed particles with a narrow size distribution. The ligand-exchange reaction of octadecanethiol-stabilized ruthenium nanoparticles (2.0 nm) with phenothiazine-linked decanethiol afforded redox-active phenothiazine-functionalized ruthenium nanoparticles (1.9 nm) that showed a reversible redox peak at +0.51 V (vs Ag/0.1 M AgNO3) in the cyclic voltammogram.
  • Electrochemical properties of self-assembled monolayers with tetracyanoanthraquinodimethane-disulfide as a new electron acceptor on gold electrode, Y Satake, H Fujihara, ELECTROCHEMISTRY, ELECTROCHEMISTRY, 73(1), 38 - 40, Jan. 2005 , Refereed
    Summary:A new electron acceptor molecule, 11,11,12,12-tetracyanoanthraquinodimethane (TCNAQ)-disulfide, has been prepared and characterized by cyclic voltarnmetry. Self-assembled monolayers of TCNAQ-disulfide or anthraquinone (AQ)-disulfide are formed by exposure of polycrystalline gold electrode to an acetonitrile solution of TCNAQ-disulfide or a dichloromethane solution of AQ-disulfide. The electrochemical study of self-assembled monolayers with TCNAQ-disulfide indicates that self-assembled monolayers of TCNAQ-disulfide on a gold electrode are stable under repeated potential cycling of ten times.
  • Remarkably stable gold nanoparticles functionalized with a zwitterionic liquid based on imidazolium sulfonate in a high concentration of aqueous electrolyte and ionic liquid, R Tatumi, H Fujihara, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, (1), 83 - 85, 2005 , Refereed
    Summary:A new type of gold nanoparticle with a zwitterionic liquid function (zwitter-Au) has been prepared using an imidazolium sulfonate-terminated thiol as a capping agent. Zwitter-Au was found to be remarkably stable in high concentrations of aqueous electrolytes, ionic liquids, and protein.
  • Preparation and characterization of gold nanoparticles with a ruthenium-terpyridyl complex, and electropolymerization of their pyrrole-modified metal nanocomposites, M Ito, T Tsukatani, H Fujihara, JOURNAL OF MATERIALS CHEMISTRY, JOURNAL OF MATERIALS CHEMISTRY, 15(9), 960 - 964, 2005 , Refereed
    Summary:The reduction of tetrachloroaurate with sodium borohydride in the presence of 2,29: 69,2"-terpyridyloctanethiol gave terpyridine-functionalized gold nanoparticles ( Tpy-Au, core size 2.0 nm). Metal complexation of Tpy-Au with ruthenium-terpyridyl trichloride, Ru( tpy)Cl-3, led to new gold nanoparticles bearing the ruthenium-terpyridine complex ( Ru-Tpy-Au, core size 5.5 nm) which showed a characteristic MLCT ( metal-to-ligand charge transfer) band in the visible region at 483 nm due to the terpyridine-ruthenium complex and a plasmon resonance at similar to510 nm in the UV-vis spectrum. The redox behavior of Ru-Tpy-Au was studied by cyclic voltammetry. Surface modification of metal electrodes was performed by the electropolymerization of pyrrole-functionalized Ru-Tpy-Au nanoparticles ( Pyr-Ru-Tpy-Au) which were obtained from the ligand-exchange reaction of Ru-Tpy-Au with omega-(N-pyrrolyl) decanethiol.
  • Chiral bisphosphine BINAP-stabilized gold and palladium nanoparticles with small size and their palladium nanoparticle-catalyzed asymmetric reaction, M Tamura, H Fujihara, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 125(51), 15742 - 15743, Dec. 2003 , Refereed
  • Preparation and electrochemical polymerization of new multifunctional pyrrolethiolate-stabilized gold and palladium nanoparticles, K Hata, H Fujihara, CHEMICAL COMMUNICATIONS, CHEMICAL COMMUNICATIONS, (22), 2714 - 2715, Nov. 2002 , Refereed
    Summary:New pyrrolylalkanethiolate-stabilized gold and palladium nanoparticles have been prepared: electrochemical polymerization of their metal nanoparticles and their TEMPO-derivatized metal nanoparticles gave the remarkably stable poly(pyrrole metal nanoparticle) films on metal electrodes.
  • Electrochemical polymerization of pyrrole-substituted tetrathiafulvalenyl-thiol, sulfone, and disulfide, Y Tsuchiya, H Fujihara, ELECTROCHEMISTRY, ELECTROCHEMISTRY, 70(8), 584 - 586, Aug. 2002 , Refereed
    Summary:The electrochemical polymerization of new pyrrole-substituted tetrathiafulvalenes (TTF) bearing thiol, sulfonyl, and disulfide groups has been studied. The repeated electrochemical oxidations of its TTF-pyrrolylthiol (1) on a glassy carbon electrode gave the modified electrode, however, the surface coverages of electroactive TTF moieties in the film did not increase with increasing number of repeated electrochemical cycling. In contrast to 1, TTF-pyrrolesulfone (2) and -disulfide (3) undergo electropolymerization to form the multilayer films onto metal electrodes, in which the surface coverages were increased by increasing number of repeated potential cycling.
  • Self-assembled monolayers with oligo-ethyleneoxy linkages on flat and curved gold surfaces, H Nakai, H Fujihara, JOURNAL OF ORGANOMETALLIC CHEMISTRY, JOURNAL OF ORGANOMETALLIC CHEMISTRY, 611(1-2), 566 - 569, Oct. 2000 , Refereed
    Summary:The preparation and properties of the self-assembled monolayers with oligo-ethyleneoxy linkages on flat and curved gold surfaces have been described. The electrochemical properties of the self-assembled monolayers of a tetrathiafulvalenyl-alkane monothiol and the ether-substituted alkane monothiol adsorbed onto gold electrodes showed no difference in their redox potentials and surface coverages. In contrast, the difference between the alkyl chain and the oxy-alkyl chain in the redox potentials and surface coverages was found in the self-assembled monolayers of the tetrathiafulvalenyl-tetrathiol and the ether-substituted tetrathiol adsorbed onto gold electrodes. The reaction of a thiol bearing oligo-ethyleneoxy linkages with octanethiolate-stabilized gold clusters gave the new oxy-Au clusters containing ether linkages which were dissolved in nonpolar and polar solvents. (C) 2000 Elsevier Science S.A. All rights reserved.
  • New electroactive tetrathiafulvalene-derivatized gold nanoparticles and their remarkably stable nanoparticle films on electrodes, H Nakai, M Yoshihara, H Fujihara, LANGMUIR, LANGMUIR, 15(25), 8574 - 8576, Dec. 1999 , Refereed
    Summary:New electroactive gold nanoparticles containing tetrathiafulvalene (TTF-Au nanoparticles) of 2-4 nm diameter have been prepared by the reaction of octanethiol-derivatized gold nanoparticles with a tetrathiafulvalenyl monothiol. Immersion of a gold electrode in a solution of the colloidal TTF-Au nanoparticles deposited the colloid films of them on the electrode surface which were remarkably stable under repeated electrochemical cycling. Thus, the TTF-Au nanoparticle films were firmly immobilized on the electrode by a simple self-assembly method without use of a terminal ligand like bifunctional aminosiloxane or mercaptosiloxane. A three-dimensional network of TTF-Au nanoparticles cross-linked by tetrathiafulvalenyl tetrathiol was assembled on a gold electrode.
  • Synthesis, crystal structure, and reactivity of new amino- and ammonio-selenuranes containing transannular Se-N bond from 5H,7H-dibenzo[b,g][1,5]selenazocines, H Mima, H Fujihara, N Furukawa, TETRAHEDRON, TETRAHEDRON, 54(5-6), 743 - 752, Jan. 1998 , Refereed
    Summary:The reaction of N-methyl-5H,7H-dibenzo[b,g][1,5]selenazocine Se-oxide 2 with SOCl2 gave the chloroammonioselenurane 3b which was further converted into the methyl-or phenyl-substituted ammonioselenurane (4 or 5) upon treatment with Me2CuLi or Ph2CuLi. The X-ray data of 3b and 4 show that the conformations of 3b and 4 are a twist-boat form. The Se-N distances are 2.191 Angstrom for 3b and 2.504 Angstrom for 4 which are significantly shorter than the sum of the van der Waals radii (3.5 Angstrom) of the two elements, indicating transannular bond formation between Se and N. The Cl-Se-N bond angle of 3b and the Me-Se-N bond angle of 4 are approximately collinear and the other bond angles around the selenium atom are consistent with a pseudo trigonal bipyramidal structure. On the other hand, the reaction of 5H,7H-dibenzo[b,g][1,5]selenazocine 6 with t-BuOCl gave the first aminoselenurane 7 with neutral amino group at the apical position. (C) 1997 Elsevier Science Ltd. All rights reserved.
  • Preparation and structure of new diazaselenuranes. Transannular hypervalent bond between seleno and diamino groups, H Fujihara, H Mima, N Furukawa, TETRAHEDRON, TETRAHEDRON, 52(44), 13951 - 13960, Oct. 1996 , Refereed
    Summary:The transannular reaction of N-benzyl derivatives of 1,11-(methanoaminomethano)-5H,7H-dibenzo[b,g][1,5]selenazocine (1 and 2) with N-bromosuccinimide (NBS) gave an aminoammonio-selenurane 4 which is the first example of an isolable diazaselenurane with two unsymmetrical apical nitrogen ligands of tertiary amino- and quaternary ammonio-groups. X-ray analysis of the aminoammonioselenurane Br- salt (4a) showed the twin-boat form; the distances of Se ... N are 1.918 Angstrom and 2.419 Angstrom respectively. The structure of selenurane 4 in solution was confirmed by Se-77 and N-15 NMR spectroscopy using the N-15-enriched aminoammonio-selenurane 4-N-15. The apical tertiary amine of selenurane 4 behaves as a nucleophile toward benzylbromide to give the bisammonio-selenurane 5. The aminoammonio and bisammonio-selenuranes 4 and 5 were converted into the neutral amines upon treatment with 2 equiv. of SmI2. Copyright (C) 1996 Elsevier Science Ltd .
  • Synthesis, electrochemical and chemical oxidations, and peri selenium participation of macrocyclic polyselenides containing naphthalene rings, H Fujihara, M Yabe, N Furukawa, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, (15), 1783 - 1785, Aug. 1996 , Refereed
    Summary:New macrocyclic polyselenides containing naphthalene rings 1-3 have been synthesized. The cyclic voltammograms of the selenides 1-3 show reversible oxidation peaks with remarkably low oxidation potentials, Hydrolysis of a solution of bis- and tris-selenides 1 and 2 in sulfuric acid gives the stable monoselenoxides 6 and 8, The peri interaction between the seleninyl and selanyl groups of 6 and 8 was identified by Se-77 NMR spectroscopy, In contrast to 1 and 2, the ring-contracted products are obtained from hydrolysis of a solution of 3 in sulfuric acid.
  • New cyclic dichalcogenonio-selenuranes induced by transannular multichalcogenides participation, H Fujihara, H Mima, N Furukawa, TETRAHEDRON, TETRAHEDRON, 52(31), 10375 - 10382, Jul. 1996 , Refereed
    Summary:The significant conformational change was found when cyclic chalcogenides, 1,11-(methanoselenomethano)-5H,7H-dibenzo[b,g][1,5]diselenocin (1)and 1,11-(methanothiomethano)-5H,7H-dibenzo[b,g][1,5]selenathiocin (3), were dissolved in concentrated H2SO4; i.e., the twin-chair forms of 1 and 3 in CHCl3 were converted completely into the twin-boat forms of the selenurane dications 2 and 4 in H2SO4 Two-electron oxidation of 1 or 3 with 2 equiv of NOPF6 gave the cyclic selenurane dication 2PF(6)(-) salt 2a or 4a which contains two selenonium or two sulfonium cations at the apical positions. The selenurane 2a or 4a could be reduced readily to neutral 1 or 3 upon treatment with PhSH, Ph(3)P, phenothiazine, or SmI2; that is, 2a or 4a acts as an oxidizing agent. Copyright (C) 1996 Elsevier Science Ltd
  • Transannular Te-S interaction in a new tellurium heterocycle, 5H,7H-Dibenzo[b,g][1,5]tellurathiocin, Y Takaguchi, H Fujihara, N Furukawa, ORGANOMETALLICS, ORGANOMETALLICS, 15(7), 1913 - 1919, Apr. 1996 , Refereed
    Summary:A new heterocycle containing tellurium and sulfur atoms, 5H, 7H-dibenzo[b,g][1,5]-tellurathiocin (1), has been synthesized. The chair and the boat forms of 1 can be characterized by H-1, C-13, and Te-125 NMR spectroscopy. A transannular bond between the tellurium and sulfur atoms was found. in the reaction product of 1 with concentrated H2SO4 by H-1, C-13, and Te-125 NMR spectroscopy. Two-electron oxidation of 1 with 2 equiv of NOPF6 gave the tellurathia dication salt (3) (Te+-S+, 2PF(6)(-)), which acts as an oxidizing agent. The reaction of 12-oxo-5H,7H-dibenzo[b,g][1,5]tellurathiocin (8) with acetic anhydride afforded a 12,12-diacetoxy-substituted tellurane (16). Heating of a benzene solution of 16 gave a remote alpha-acetoxylated sulfide 18 and the parent 5H,7H-dibenzo[b,g] [1,5]tellurathiocin (1). Reaction of tellurathiocin 1 with t-BuOCl gave exclusively its telluroxide 8. Tellurathiocin 1 was reacted with Br-2 to give a 12,12-dibromo-substituted tellurane (25). Reaction of the tellurane 25 with aqueous NaOH gave the telluroxide 8 selectively, and variable-temperature H-1 NMR studies revealed that the telluroxide 8 was fixed in boat form. The Te-125 and Se-77 NMR spectra of 12-oxo-5H,7H-dibenzo[b,g][1,5]telluraselenocin (28) show a strong transannular interaction between the tellurium and selenium atoms.
  • SE-DEMETHYLATION FROM 8-DIMETHYLAMINO-1-METHYLSELANYL-NAPHTHALENE AND ITS SE-OXIDE - AN X-RAY STRUCTURE OF A STABLE SELENENIC ANHYDRIDE WITH A 8-DIMETHYLAMINO-1-NAPHTHYL LIGAND - PERI SE-CENTER-DOT-CENTER-DOT-CENTER-DOT-N INTERACTION, H FUJIHARA, H TANAKA, N FURUKAWA, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, (19), 2375 - 2377, Oct. 1995 , Refereed
    Summary:Reaction of a selenoxide, 8-dimethylamino-1-methylseleninylnaphthalene 2, with acetic anhydride gave exclusively the Se-demethylated product, the corresponding selenoperacetate 3; the X-ray crystal structure of the stable selenenic anhydride 6 derived from hydrolysis of 3 shows the strong intramolecular interactions between selenium and nitrogen atoms.
  • SYNTHESIS OF 5H,7H-DIBENZO[B,G][1,5]SELENOXOCINE FROM A SELENONIUM SALT OF 5H,7H-DIBENZO[B,G][1,5]DISELENOCINE AND FIRST X-RAY EVIDENCE FOR THE TRANSANNULAR OXYGEN SELENIUM INTERACTION, H FUJIHARA, T NAKAHODO, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 36(35), 6275 - 6278, Aug. 1995 , Refereed
    Summary:A new heterocyclic compound, 5H,7H-dibenzo[b,g][1,5]selenoxocine (1), has been prepared from the benzylic selenonium salt of 5H,7H-dibenzo[b,g][1,5]diselenocine. Treatment of the selenoxide of 1 with acetylenedicarboxylate gave the stable selenonium ylide (4); the X-ray structure of 4 shows the strong transannular contact between oxygen and selenium atoms.
  • SYNTHESIS AND X-RAY STRUCTURE OF 1,8-BIS(PHENYLTELLURO)NAPHTHALENE AND ITS PERI TELLURIUM-TELLURIUM INTERACTION, H FUJIHARA, H ISHITANI, Y TAKAGUCHI, N FURUKAWA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (7), 571 - 572, Jul. 1995 , Refereed
    Summary:New 1,8-diaryl and dialkyl substituted ditelluronaphthalenes, 1,8-bis(phenyltelluro)naphthalene(l) and 1,8-bis(butyltelluro)naphthalene, have been synthesized. The cyclic voltammogram of 1 showed the reversible electrochemical oxidation with remarkably low oxidation potential. The peri telluronio-tellurenyl interaction in the telluronium cation of 1 was identified by Te-125 NMR spectroscopy.
  • A NEW MODE FOR THE FORMATION OF ENDOCYCLIC DOUBLE-BOND FROM THE SELENONIUM SALT OF 1,11-METHANOSELENOMETHANO-5H,7H-DIBENZO[B,G]DISELENOCIN - SYNTHESIS OF METHANOSELENOMETHANO-BRIDGED DIBENZO[B,F]SELENEPIN, H FUJIHARA, T NAKAHODO, H MIMA, N FURUKAWA, HETEROCYCLES, HETEROCYCLES, 41(6), 1127 - 1130, Jun. 1995 , Refereed
    Summary:Benzylic selenonium salt of 1,11-methanoselenomethano-5H,7H-dibenzo[b,g][1,5]diselenocin was treated with tert-BuOK to give the corresponding Stevens-type rearrangement product which was converted into a new heterocyclic compound, 1,11-ethano-5H,7H-dibenzo[b,g][1,5]diselenocin (4), upon treatment with m-chloroperbenzoic acid. The conformational property of 4 is described.
  • SYNTHESIS OF A NEW MACROCYCLE CONTAINING TIN AND SELENIUM, 1,9-DISELENA-5,5,13,13-TETRAMETHYL-5,13-DISTANNACYCLOHEXADECANE, AND RELATED-COMPOUNDS, H FUJIHARA, Y TAKAGUCHI, N FURUKAWA, HETEROCYCLES, HETEROCYCLES, 39(2), 431 - 434, Dec. 1994 , Refereed
    Summary:New cyclic compounds containing heavier group 14 and 16 elements, 1-selena- or 1-thia-5,5-dimethyl-5-stannacyclooctane (1 or 3) and 1,9-diselena- or 1,9-dithia-5,5,13,13-tetramethyl-5,13-distannacyclohexadecane (2 or 4), and its selononium derivatives have been synthesized.
  • THE SIMPLE PREPARATION OF ALDEHYDES AND KETONES BY THE PHOTO-OXYGEN REARRANGEMENT OF NAPHTHO[1,8-DE]DITHIIN MONOOXIDES, N FURUKAWA, T FUJII, T KIMURA, H FUJIHARA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (6), 1007 - 1010, Jun. 1994 , Refereed
    Summary:Naphthalene-1,8-dithiol reacted with aldehydes to give dithioacetals which were oxidized to 2-substituted naphtho[1,8-de]1,3-dithiin-1-oxides (4). 2,2-Disubstituted naphtho[1,8-de]1,3-dithiin-1-oxides (5) were obtained on treatment of 4 with NaH/electrophiles. Photolysis of 4 and 5 undergoes intramolecular oxygen rearrangement to generate aldehydes and ketones quantitatively together with naphthalene-1,8-dithiole.
  • STEREOSELECTIVE SULFUR EXTRUSION REACTION OF SYN-10,20-DIBROMO-2,3,12,13-TETRATHIA[4.4]METACYCLOPHANES AND ANTI-10,20-DIBROMO-2,3,12,13-TETRATHIA[4.4]METACYCLOPHANES TO THE CORRESPONDING SYN-DITHIA[3.3]METACYCLOPHANES AND ANTI-DITHIA[3.3]METACYCLOPHANES, H FUJIHARA, JJ CHIU, N FURUKAWA, HETEROATOM CHEMISTRY, HETEROATOM CHEMISTRY, 4(5), 487 - 490, Oct. 1993 , Refereed
    Summary:A new cyclophane, 10,20-dibromo-2,3,12,13-tetra-thia[4.4]metacyclophane (1), has been synthesized by the oxidative coupling reaction of 2,6-bis(mercaptomethyl)-1-bromobenzene with I2. Both syn and anti isomers of 1 can be isolated at room temperature. The thermal sulfur extrusion reaction of anti-1 with (Et2N)3P afforded anti-9,18-dibromo-2,11-dithia[3.3]metacyclophane, while syn-1 gave 9,19-dibromo-2,11,12-trithia[3.4]metacyclophane. syn-9,18-Dibromo-2,11-dithia[3.3]metacyclophane was produced from the photochemical sulfur extrusion of syn-1 with (MeO)3P.
  • PREPARATION AND X-RAY STRUCTURE OF 8,9,19,20-TETRAHYDRODINAPHTHO[1',8'-JK, 1,8-BC][1,5,9,13]TETRASELENACYCLOHEXADECINE, AND ITS NOVEL RING CONTRACTION IN CONCENTRATED SULFURIC-ACID, H FUJIHARA, M YABE, M IKEMORI, N FURUKAWA, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, (18), 2145 - 2146, Sep. 1993 , Refereed
    Summary:The novel title compound 1 has been synthesized; upon hydrolysis in sulfuric acid it gave ring-contracted products naphtho[1,8-bc]-1,5-diselenocin and its selenoxide.
  • A NEW MODE FOR THE GENERATION OF O-XYLYLENE BY PERI-SELENIUM PARTICIPATION FROM 8,13-DIHYDROBENZO[G]NAPHTHO[1,8-BC][1,5]DISELENONIN UNDER IRRADIATION, H FUJIHARA, M YABE, N FURUKAWA, JOURNAL OF ORGANIC CHEMISTRY, JOURNAL OF ORGANIC CHEMISTRY, 58(20), 5291 - 5292, Sep. 1993 , Refereed
    Summary:A new cyclic bis-selenide containing benzylic methylene groups and a naphthalene ring, 8,13-dihydrobenzo[g]naphtho[1,8-bc] [1,5]diselenonin (1), was stable in the dark; however, the C-Se bond of 1 was readily cleaved to form o-xylylene (2) and naphtho[1,8-cd]-1,2-diselenole (3) under the scattered light in the laboratory. The o-xylylene generated from 1 under the scattered light or UV irradiation (254 nm) was trapped by several dienophiles.
  • FORMATION OF NEW HYDROXYSELENONIO AND HYDROXYAMMONIO-SELENURANES FROM REACTION OF SE-OXIDES OF 5H,7H-DIBENZO[B,G][1,5]DISELENOCINE AND N-METHYL-5H,7H-DIBENZO[B,G][1,5]SELENAZOCINE WITH SILYL TRIFLATES, H FUJIHARA, Y UENO, JJ CHIU, N FURUKAWA, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, (18), 2247 - 2248, Sep. 1992 , Refereed
    Summary:The transannular reaction of 5H,7H-dibenzo[b,g][1,5]diselenocine Se-oxide 1 or N-methyl-5H,7H-dibenzo[b,g][1,5]selenazocine Se-oxide 2 with 1 equiv. of silyl triflates, CF3SOSiMe3 and CF3SO3SiMe2But, produced a new hypervalent selenurane which consists of two unsymmetrical apical ligands such as the hydroxy group and the selenonio or ammonio group.
  • A NEW OXIDATIVE SE-DEALKYLATION IN SELENO-PUMMERER REACTION OF 1,8-BIS(METHYLSELENO)NAPHTHALENE AND NAPHTHO[1,8-B,C]-1,5-DISELENOCIN INDUCED BY PERI-SELENIUM PARTICIPATION, H FUJIHARA, R SAITO, M YABE, N FURUKAWA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (8), 1437 - 1440, Aug. 1992 , Refereed
    Summary:A new type of oxidative Se-dealkylation reaction was found in either the reaction of 1,8-bis(methylseleno)naphthalene and naphtho[1,8-b,c]-1,5-diselenocin with benzoyl peroxide or the reaction of their Se-oxides with carboxylic acid anhydrides.
  • PREPARATION OF 2,5-DISILYLATED THIOPHENE DERIVATIVES AND THEIR CONVERSION TO 2,5-DIHALO DERIVATIVES, N FURUKAWA, H HOSHIAI, T SHIBUTANI, M HIGAKI, F IWASAKI, H FUJIHARA, HETEROCYCLES, HETEROCYCLES, 34(6), 1085 - 1088, Jun. 1992 , Refereed
    Summary:2,5-Disilylated thiophenes were prepared and readily oxidized with m-chloroperbenzoic acid (m-CPBA) to give the corresponding 1,1-dioxides. The thiophene dioxide was converted to 2,5-dihalogenothiophene dioxides with halogenating agents.
  • GENERATION OF NEW DITHIA DICATIONS FROM STERICALLY CONGESTED 1,9-DITHIODIBENZOTHIOPHENES AND THEIR MONOOXIDES IN CONCENTRATED SULFURIC-ACID, N FURUKAWA, T KIMURA, Y HORIE, S OGAWA, H FUJIHARA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 33(11), 1489 - 1490, Mar. 1992 , Refereed
    Summary:1,9-Dithiodibenzothiophenes 2 were prepared by ring contraction of 4,6-dithiothianthrene-5-oxides with n-butyllithium. Both compounds 2 and their monooxides 3 upon dissolution in conc. H2SO4 afforded the corresponding new dithia dications. Electrochemical oxidation of 2 provides the evidence for the neighboring group interaction between the two 1,9-sulfenyl sulfur atoms.
  • SIGMA-BONDED DICATIONS FROM MEDIUM-SIZED SELENIUM AND TELLURIUM HETEROCYCLES, H FUJIHARA, N FURUKAWA, PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, 67(1-4), 131 - 134, 1992 , Refereed
  • FORMATION OF DICATION AND HYPERVALENT BOND FROM 5H, 7H-DIBENZO[B,G][1,5]SELENAZOCINE, H FUJIHARA, H MIMA, N FURUKAWA, PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS, 67(1-4), 141 - 144, 1992 , Refereed
  • SYNTHESIS OF A NEW TELLURIUM HETEROCYCLE, 5H,7H-DIBENZO[B,G][1,5]TELLURATHIOCIN, AND ISOLATION AND REACTIVITY OF ITS TELLURATHIA DICATION SALT, H FUJIHARA, Y TAKAGUCHI, JJ CHIU, T ERATA, N FURUKAWA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (1), 151 - 154, Jan. 1992 , Refereed
    Summary:A new heterocycle containing tellurium and sulfur atoms, 5H,7H-dibenzo-[b,g][1,5]tellurathiocin (1), has been synthesized. The transannular bond formation between tellurium and sulfur atoms was found in the reaction of 1 with concd H2SO4 by H-1, C-13, and Te-125 NMR spectroscopy. Two-electron oxidation of 1 with 2 equiv. of NOPF6 gave the tellurathia dication salt 3 (> Te+-S+ < 2PF6-) which acts as an oxidizing agent.
  • EXTREMELY FACILE LIGAND-EXCHANGE AND DISPROPORTIONATION REACTIONS OF DIARYL SULFOXIDES, SELENOXIDES, AND TRIARYLPHOSPHINE OXIDES WITH ORGANOLITHIUM AND GRIGNARD-REAGENTS, N FURUKAWA, S OGAWA, K MATSUMURA, H FUJIHARA, JOURNAL OF ORGANIC CHEMISTRY, JOURNAL OF ORGANIC CHEMISTRY, 56(22), 6341 - 6348, Oct. 1991 , Refereed
    Summary:Diaryl sulfoxides undergo unusually rapid ligand-exchange reaction upon treatment with organolithium reagents at -95-degrees-C. Optically pure phenyl p-tolyl sulfoxide (4b) reacted with organolithium reagents at the range from -20 to -95-degrees-C to give facile ligand-exchange and disproportionation products, i.e., diphenyl sulfoxide (7), recovered 4b, and di-p-tolyl sulfoxide (8) in a statistical ratio of 1:2:1 in quantitative yields, and the recovered 4b was completely racemized. This facile ligand exchange was observed in the similar reactions using only diaryl selenoxides and triarylphosphine oxides. The reactions of O-18-labeled phenyl p-tolyl sulfoxide (4c) with organolithium reagents gave products in a statistical ratio without O-18 scrambling, indicating that only the C-S bond cleavage took place under low temperature. It is suggested that the ligand exchange reactions occur by the nucleophilic attack by organolithium reagent at the sulfinyl sulfur atom, giving sigma-sulfurane as an intermediate that collapses rapidly. These results suggest that the treatment of arylic sulfoxides, selenoxides, and phosphine oxides with strong bases should be effected with caution.
  • PERI INTERACTION BETWEEN SELENIUM ATOMS IN DINAPHTHO[1,8-B,C]-1,5-DISELENOCIN AND 1,8-BIS(METHYLSELENO)NAPHTHALENE, H FUJIHARA, M YABE, JJ CHIU, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 32(34), 4345 - 4348, Aug. 1991 , Refereed
    Summary:A new symmetrical diseleno peri-bridged naphthalene, dinaphthol[1,8-b,c]-1,5-diselenocin (1), and 1,8-bis(methylseleno)naphthalene (2) have been synthesized. The cyclic voltammogram of 1 and 2 showed one reversible oxidation peak with remarkably low oxidation potential. Selenide 1 in CHCl3 under air and scattered light undergoes oxidation to give the corresponding Se-oxide 11. The peri selenium-selenium interaction of 1 and 2 was found in electrochemical oxidation, in concentrated sulfuric acid, and in EI mass spectrum.
  • STRUCTURE OF 1,5-DISELENONIABICYCLO(3.3.0)OCTANE BIS(TETRAFLUOROBORATE) ACETONITRILE SOLVATE, F IWASAKI, M MORIMOTO, M YASUI, R AKAISHI, H FUJIHARA, N FURUKAWA, ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 47, 1463 - 1466, Jul. 1991 , Refereed
    Summary:C6H12Se2(2+).2BF4-.CH3CN, M(r) = 456.74, monoclinic, P2(1)/a, a = 24.053 (6), b = 6.955 (2), c = 9.416 (3) angstrom, beta = 100.47 (2)-degrees, V = 1549.0 (7) angstrom 3, Z = 4, D(x) = 1.959 Mg m-3, T = 295 K, lambda-(Mo K-alpha) = 0.71069 angstrom, mu = 4.796 mm-1, F(000) = 880, R = 0.069 for 1688 observed reflections. The Se+-Se+ distance is 2.382 (2) angstrom. The conformation of the eight-membered ring is a chair-boat form, while that in 1,5-dithioniabicyclo[3.3.0]octane bis(trifluoromethanesulfonate) is a distorted chair-chair form. The X-ray analysis reveals that the crystal has one acetonitrile molecule as a crystal solvent in an asymmetric unit. Very short contacts are observed between the Se atom of the dication and the F atoms of counter anions and the N atom of CH3CN. The coordination around Se is a roughly distorted octahedron with F, N and two C atoms in a plane and apical Se and F atoms.
  • A NEW APPROACH FOR PREPARATION OF ATROPISOMERS OF ARYLPYRIDYLS VIA CROSS-COUPLING REACTIONS OF ARYL 2-(3-SUBSTITUTED)PYRIDYL SULFOXIDES WITH GRIGNARD AND ORGANOLITHIUM REAGENTS, T SHIBUTANI, H FUJIHARA, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 32(25), 2943 - 2946, Jun. 1991 , Refereed
    Summary:The cross-coupling reactions of phenyl 2-(3-substituted)pyridyl sulfoxides with 2-methoxyphenyl- and 1-(2-methoxy)naphthyl Grignard and 2-phenoxyphenyl lithium reagents afforded atropisomers of arylpyridyl derivatives in good yields which undergo thermal epimerization.
  • A NEW AND CONVENIENT PROCESS FOR PREPARATION OF OPTICALLY PURE ARYL 2-PYRIDYL SULFOXIDES, T SHIBUTANI, H FUJIHARA, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 32(25), 2947 - 2948, Jun. 1991 , Refereed
    Summary:Alpha-lithiation of aryl 12-pyridyl sulfoxides, treatment with l-menthyl sulfinate, and desulfinylation with Grignard reagents gave optically pure aryl 2-pyridyl sulfoxides in moderate yields.
  • A NEW TYPE OF REDUCTIVE CLEAVAGE OF DISULFIDE IN QUADRUPLY ORTHO-SUBSTITUTED DIPHENYL DISULFIDE BY NEIGHBORING THIOLATE ANION, H FUJIHARA, JJ CHIU, N FURUKAWA, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 64(2), 699 - 701, Feb. 1991 , Refereed
    Summary:The reaction of bis[2,6-bis(bromomethyl)-phenyl] disulfide with thiourea or sodium sulfide showed an unusual reductive cleavage of disulfide linkage with elimination of bromine by neighboring-group participation of the generated thiolate anion. Its reaction gave the structurally intriguing thiols which indicated the facile anodic oxidation.
  • FORMATION, CHARACTERIZATION AND REACTIVITY OF A SELENAZA DICATION [R2SE+-N+R3] FROM N-METHYL-5H,7H-DIBENZO[B,G][1,5]SELENAZOCINE, H FUJIHARA, H MIMA, T ERATA, N FURUKAWA, JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, (2), 98 - 99, Jan. 1991 , Refereed
    Summary:A new heterocycle containing selenium and nitrogen atoms, N-methyl-5H,7H-dibenzo[b,g][1,5]selenazocine 1, has been synthesized; the reaction of the selenoxide of 1 with (CF3SO2)2O gave a novel selenaza dication salt which was characterized by Se-77 NMR spectroscopy, and the dication acts as an oxidizing agent.
  • SYNTHESIS, CONFORMATION, AND THE STEREOSELECTIVE SULFUR EXTRUSION REACTION OF A NEW INTRAANNULAR DIBROMO-SUBSTITUTED TETRATHIA[4.4]METACYCLOPHANE, H FUJIHARA, JJ CHIU, N FURUKAWA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (1), 141 - 144, Jan. 1991 , Refereed
    Summary:The oxidative coupling of 2,6-bis(mercaptomethyl)bromobenzene using I2 gave syn- and anti-10,20-dibromo-2,3,12,13-tetrathia[4.4]metacyclophane (1) which can be isolated in the solid state at room temperature. The sulfur extrusion reaction of anti-1 with (Et2N)3P afforded the corresponding dithia[3.3]metacyclophane, while syn-1 gave the trithia[3.4]metacyclophane.
  • ELECTROCHEMICAL PROPERTY AND FORMATION OF THE CATION RADICAL AND DICATION OF DINAPHTHO[1,8-B,C]-1,5-DITHIOCIN, H FUJIHARA, JJ CHIU, N FURUKAWA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (12), 2217 - 2220, Dec. 1990 , Refereed
    Summary:A new symmetrical dithio peri-bridged naphthalene, dinaphthol[1,8-b,c]-1,5-dithiocin (1) has been synthesized. The cyclic voltammogram of 1 showed one reversible oxidation peak. ESR spectrum of the concd H2SO4 solution of 1 showed the formation of the cation radical. The formation of the dictation of 1 was observed in the reaction of the corresponding monosulfoxide with concd D2SO4 by both high-field H-1 and C-13 NMR spectroscopy.
  • STRUCTURES OF 2,6-BIS(METHYLTHIOMETHYL)PHENYL PHENYL SULFOXIDE AND 9,18-EPITHIO-2,11-DITHIA[3.3]METACYCLOPHANE-TRICHLOROMETHANE (1/1), F IWASAKI, N TOYODA, N YAMAZAKI, H FUJIHARA, N FURUKAWA, ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 46, 2154 - 2157, Nov. 1990 , Refereed
  • REACTIONS OF SULFOXIDES BEARING ORTHO-SULFUR FUNCTIONAL-GROUPS AND THIANTHRENE MONOOXIDE WITH GRIGNARD-REAGENTS, N FURUKAWA, S OGAWA, K MATSUMURA, T SHIBUTANI, H FUJIHARA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (6), 979 - 982, Jun. 1990 , Refereed
  • 1,5-DISELENACYCLOOCTANE - REVERSIBLE ELECTROCHEMICAL OXIDATION WITH REMARKABLY LOW OXIDATION POTENTIAL IN DIALKYL SELENIDES, H FUJIHARA, R AKAISHI, N FURUKAWA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (4), 549 - 550, Apr. 1990 , Refereed
  • REACTIVITY OF DISELENIDE DICATION SALT, 1,5-DISELENONIABICYCLO[3.3.0]OCTANE BIS(HEXAFLUOROPHOSPHATE) TOWARD AROMATICS - A NEW MODE OF AROMATIC-SUBSTITUTION AND REDOX REACTION, H FUJIHARA, A NAKAMURA, R AKAISHI, N FURUKAWA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (3), 393 - 396, Mar. 1990 , Refereed
  • NOVEL HEXACOORDINATE AND PENTACOORDINATE SULFUR-COMPOUNDS - DICHLORODIAZAPERSULFURANE AND ITS PERSULFONIUM SALT FROM 1,11-(METHANOAMINOMETHANO)-5H,7H-DIBENZO[B,G][1,5]THIAZOCINE, H FUJIHARA, N OI, T ERATA, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 31(7), 1019 - 1022, 1990 , Refereed
  • TRANSANNULAR INTERACTION BETWEEN SELENIUM AND SULFUR-ATOMS IN 5H,7H-DIBENZO[B,G][1,5]SELENATHIOCIN - FORMATION OF A NEW HETEROATOM DICATION [GREATER-THAN-SE+-+S-LESS-THAN], H FUJIHARA, H MIMA, JJ CHIU, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 31(16), 2307 - 2310, 1990 , Refereed
  • CHEMICAL AND ELECTROCHEMICAL REDUCTION OF DISELENIDE DICATION SALT, 1,5-DISELENONIABICYCLO[3.3.0]OCTANE BIS(HEXAFLUOROPHOSPHATE), H FUJIHARA, R AKAISHI, A NAKAMURA, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 31(44), 6375 - 6378, 1990 , Refereed
  • MECHANISTIC INVESTIGATION ON THE REMOTE PUMMERER REACTION OF 1,5-DITHIACYCLOOCTANE 1-OXIDE WITH ACETIC-ANHYDRIDE VIA INTERMEDIATE FORMATION OF DISULFIDE DICATION, H FUJIHARA, A KAWADA, N FURUKAWA, GAZZETTA CHIMICA ITALIANA, GAZZETTA CHIMICA ITALIANA, 119(12), 617 - 620, Dec. 1989 , Refereed
  • CAMPHORYL SULFIDE AS A CHIRAL AUXILIARY AND A MEDIATOR FOR ONE-STEP SYNTHESIS OF OPTICALLY-ACTIVE 1,2-DIARYLOXIRANES, N FURUKAWA, Y SUGIHARA, H FUJIHARA, JOURNAL OF ORGANIC CHEMISTRY, JOURNAL OF ORGANIC CHEMISTRY, 54(17), 4222 - 4224, Aug. 1989 , Refereed
  • MOLECULAR-STRUCTURE OF DITHIA DICATIONS AND SOME ASPECTS OF THEIR CHEMISTRY, H FUJIHARA, N FURUKAWA, JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM, JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM, 55, 261 - 272, Apr. 1989 , Refereed
  • SYNTHESIS, CRYSTAL-STRUCTURE, AND CONFORMATIONAL PROPERTY OF N,N'-DIMETHYL-1,11-(METHANOAMINOMETHANO)-5H,7H-DIBENZO[B,G][1,5]-THIAZOCINE - A NEW HETEROCYCLIC SYSTEM, H FUJIHARA, N OI, R AKAISHI, T KAWAI, N FURUKAWA, HETEROCYCLES, HETEROCYCLES, 29(3), 441 - 444, Mar. 1989 , Refereed
  • A MILD, HIGH-YIELD CONVERSION OF THIOLS INTO DISULFIDES USING DISULFIDE DICATION SALT - A NEW REDOX SYSTEM, H FUJIHARA, R AKAISHI, N FURUKAWA, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 62(2), 616 - 617, Feb. 1989 , Refereed
  • TRANS-ANNULAR SULFUR-SULFUR INTERACTION IN 3,7,9-TRITHIABICYCLO[3.3.1]NONANE AS A NEW CYCLIC TRIS-SULFIDE - QUEST FOR THE INTRABRIDGED DITHIA DICATION, H FUJIHARA, R AKAISHI, N FURUKAWA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 30(33), 4399 - 4402, 1989 , Refereed
  • A NEW MODE OF AROMATIC-SUBSTITUTION AND REDOX REACTION OF SUBSTITUTED BENZENES WITH DISULFIDE DICATION - 1,5-DITHIONIABICYCLO[3.3.0]OCTANE BIS(TRIFLUOROMETHANESULFONATE), H FUJIHARA, R AKAISHI, N FURUKAWA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (4), 709 - 712, Apr. 1988 , Refereed
  • FORMATION OF CHLOROSULFONIUM SALT OF 1,5-DITHIACYCLOOCTANE AND TRANS-ANNULAR SULFUR-SULFUR INTERACTION IN HYDROLYSIS OF ITS SALT, H FUJIHARA, R AKAISHI, N FURUKAWA, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 60(12), 4451 - 4452, Dec. 1987 , Refereed
  • FORMATION AND ISOLATION OF THE DITHIOETHER DICATIONS OF CYCLIC DITHIOETHERS IN THE REACTIONS OF THE CORRESPONDING S-OXIDES AND S-IMINE IN CONCENTRATED SULFURIC-ACID, H FUJIHARA, A KAWADA, N FURUKAWA, JOURNAL OF ORGANIC CHEMISTRY, JOURNAL OF ORGANIC CHEMISTRY, 52(19), 4254 - 4257, Sep. 1987 , Refereed
  • A NEW PREPARATIVE METHOD, CHARACTERIZATION, AND REACTIVITY OF DISULFIDE DICATION SALTS OF CYCLIC BIS-SULFIDES - R2S+-S+R2.2CF3SO3-, H FUJIHARA, R AKAISHI, N FURUKAWA, JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, (12), 930 - 931, Jun. 1987 , Refereed
  • A NEW SOURCE FOR GENERATION OF BENZYNE AND PYRIDYNE - REACTIONS OF ORTHO-HALOPHENYL (OR 3-BROMO-4-PYRIDYL) PHENYL SULFOXIDES WITH GRIGNARD-REAGENTS, N FURUKAWA, T SHIBUTANI, H FUJIHARA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 28(24), 2727 - 2730, 1987 , Refereed
  • PREPARATION OF PYRIDYL GRIGNARD-REAGENTS AND CROSS COUPLING REACTIONS WITH SULFOXIDES BEARING AZAHETEROCYCLES, N FURUKAWA, T SHIBUTANI, H FUJIHARA, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 28(47), 5845 - 5848, 1987 , Refereed
  • IPSO-SUBSTITUTION REACTIONS OF 2-SULFONYLPYRIDINES AND 4-SULFONYLPYRIDINES WITH GRIGNARD-REAGENTS, N FURUKAWA, M TSURUOKA, H FUJIHARA, HETEROCYCLES, HETEROCYCLES, 24(12), 3337 - 3340, Dec. 1986 , Refereed
  • A CONVENIENT PREPARATION OF SULFINIC ACIDS BY THE REACTION OF 2-SULFONYLPYRIDINES AND THEIR N-OXIDES WITH NUCLEOPHILES, N FURUKAWA, M TSURUOKA, H FUJIHARA, HETEROCYCLES, HETEROCYCLES, 24(11), 3019 - 3022, Nov. 1986 , Refereed
  • NEW EVIDENCE FOR INTRAMOLECULAR SULFUR SULFUR INTERACTION IN 2,6-BIS(METHYLTHIOMETHYL)PHENYL PHENYL SULFIDE, H FUJIHARA, JJ CHIU, N FURUKAWA, JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, (17), 1359 - 1360, Sep. 1986 , Refereed
  • TETRAKIS-SULFOXIDES - A NEW TYPE OF PHASE-TRANSFER CATALYST FOR NUCLEOPHILIC DISPLACEMENTS AND ALKYLATIONS, H FUJIHARA, K IMAOKA, N FURUKAWA, S OAE, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 1, (2), 333 - 336, Feb. 1986 , Refereed
  • FORMATION OF DITHIOETHER DICATIONS OF CYCLIC DITHIOETHERS IN CONCENTRATED SULFURIC-ACID, H FUJIHARA, A KAWADA, N FURUKAWA, HETEROCYCLES, HETEROCYCLES, 24(1), 17 - 20, Jan. 1986 , Refereed
  • REACTIONS OF PYRIDYL AND QUINOLYL SULFOXIDES WITH GRIGNARD-REAGENT - A CONVENIENT PREPARATION OF PYRIDYL AND QUINOLYL GRIGNARD-REAGENTS, N FURUKAWA, T SHIBUTANI, K MATSUMURA, H FUJIHARA, S OAE, TETRAHEDRON LETTERS, TETRAHEDRON LETTERS, 27(33), 3899 - 3902, 1986 , Refereed
  • ADDITIVITY OF ISOTOPE EFFECTS FOR SUCCESSIVE DEUTERATION IN THE DEACETYLATION OF ACETYL-ALPHA-CHYMOTRYPSIN, H FUJIHARA, RL SCHOWEN, BIOORGANIC CHEMISTRY, BIOORGANIC CHEMISTRY, 13(1), 57 - 61, 1985 , Refereed
  • THE PUMMERER REARRANGEMENT OF 1,5-DITHIACYCLO-OCTANE 1-OXIDE WITH ACETIC-ANHYDRIDE - EVIDENCE FOR FORMATION OF THE DISULFIDE DICATION, N FURUKAWA, A KAWADA, T KAWAI, H FUJIHARA, JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, (18), 1266 - 1267, 1985 , Refereed
  • SOLVENT EFFECT ON THE RADICAL COPOLYMERIZABILITY OF STYRENE WITH P-SUBSTITUTED METHYL CINNAMATES, J ASAKURA, M YOSHIHARA, H FUJIHARA, Y MATSUBARA, T MAESHIMA, JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY, JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY, A19(2), 311 - 317, 1983 , Refereed
  • ASYMMETRIC INDUCTION IN FREE-RADICAL ADDITIONS OF THIOLS TO OLEFINS, M YOSHIHARA, K NOZAKI, H FUJIHARA, T MAESHIMA, JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY, JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY, A18(3), 411 - 419, 1982 , Refereed
  • ASYMMETRIC INDUCTION IN FREE-RADICAL ADDITION OF THIOLS TO OLEFINS, M YOSHIHARA, K NOZAKI, H FUJIHARA, T MAESHIMA, JOURNAL OF POLYMER SCIENCE PART C-POLYMER LETTERS, JOURNAL OF POLYMER SCIENCE PART C-POLYMER LETTERS, 19(2), 49 - 52, 1981 , Refereed
  • ELECTRON-TRANSFER PROCESSES IN THE REACTION OF PHENOTHIAZINE AND 10-METHYLPHENOTHIAZINE WITH 2,2'-AZOBISISOBUTYRONITRILE, H FUJIHARA, S FUKE, M YOSHIHARA, T MAESHIMA, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (9), 1271 - 1272, 1981 , Refereed
  • TETRAKIS-SULFOXIDES AS PHASE-TRANSFER CATALYSTS, H FUJIHARA, K IMAOKA, N FURUKAWA, S OAE, CHEMISTRY LETTERS, CHEMISTRY LETTERS, (9), 1293 - 1296, 1981 , Refereed
  • SYNTHESIS OF NEW MACROCYCLIC POLYTHIAETHER, H FUJIHARA, K IMAOKA, N FURUKAWA, S OAE, HETEROCYCLES, HETEROCYCLES, 16(10), 1701 - 1704, 1981 , Refereed

Books etc

  • Emergence of Highly Elaborated π-Space and It’s Function, 分担執筆, 9 高次組織化π共役ポリマーナノチューブ複合体のキラルπ空間制御と機能開発, シーエムシー出版,   2013 03

Conference Activities & Talks

  • Synthesis and Properties of Cyclic Diaminoselenide Bearing Pyrene Unit, Tsukasa Nakahodo, 13th International Conference on the Chemistry of Selenium and Tellurium,   2016 05 23
  • Control of Chiral p-Space in Highly-Organized p-Conjugated Polymer Nanotube Composites and Their Function, 藤原 尚, 仲程 司, 2nd International Symposium on Emergence of Highly Elaborated p-Space and Its Function,   2010 11 13 , 2nd International Symposium on Emergence of Highly Elaborated p-Space and Its Function

Misc

  • Synthesis and Functionalization of Metal Nanoparticle-Polythiophene Hybrid Nanotubes: Hybrid Nanointerface, Tsukasa Nakahodo, Hisashi Fujihara, JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN, 71, 1, 39, 50,   2013 01 , 10.5059/yukigoseikyokaishi.71.39, http://ci.nii.ac.jp/naid/130003373259
    Summary:In recent years, nanostructured materials such as carbon nanotubes, polymer nanotubes, metal nanotubes, and metal nanoparticles have received a great deal of attention due to their unique physical and chemical properties as well as their enormous potential applications such as catalysts, nanoelectronic devices, magnetic devices, sensors, and biomaterial separation membranes. Although several methods have been developed to functionalize carbon nanotubes with inorganic and organic materials, related works on pi-conjugated polymer nanotubes such as polythiophene and metal nanotubes have been reported in only a few cases. In particular, the combination of conducting polymers and metal nanoparticles provides an exciting system to investigate with the possibility of designing nanotube functionality However, the preparation of nanotube composites consisting of metal nanoparticles and polythiophene as a constituent of nanotubes by electropolymerization of thiophene-modified metal nanoparticles has never been reported. We have developed a new method for the fabrication of metal nanoparticle/polythiophene nanotube composites, i.e., the template-based electrochemical oxidative polymerization of terthiophene-linked-thiol and -phosphine-stabilized gold and palladium nanoparticles in a nanoporous alumina membrane as a template gave the hybrid nanotubes of polythiophene and the metal nanoparticles without aggregation of the metal nanoparticles. This article describes the synthesis and functionalization of metal nanoparticles and polythiophene, and their hybrid nanotubes.
  • Electrochemical Properties of Redox-active Tetrathiafulvalene and Fullerene C_<60>-functionalized Gold Nanoparticles, and Their Nanocomposite Films-modified Electrodes, SATAKE Yuh, NAKAI Hidetaka, ITO Seishiro, FUJIHARA Hisashi, 78, 11, 507, 513,   2005 11 20 , http://ci.nii.ac.jp/naid/10017462927
  • Metal Ion-Mediated Assembly of Redox-active Oligoethyleneoxy-functionalized Gold Nanoparticles and Their Immobilization on a Metal Electrode, SATAKE Yuh, WAKATSUKI Shoko, WATANABE Misa, ITO Seishiro, FUJIHARA Hisashi, 78, 6, 249, 253,   2005 06 20 , http://ci.nii.ac.jp/naid/10017462462
  • Synthesis and Electropolymerization of Terthiophene-modified Gold and Palladium Nanoparticles : Metal Nanoparticle-Polythiophene Composites, SATAKE Yuh, ITO Seishiro, FUJIHARA Hisashi, 78, 4, 157, 163,   2005 04 20 , http://ci.nii.ac.jp/naid/10017462176
  • Electrochemical Properties of Self-assembled Monolayers with Tetracyanoanthraquinodimethane-disulfide as a New Electron Acceptor on Gold Electrode, SATAKE Yuh, FUJIHARA Hisashi, 73, 1, 38, 40,   2005 01 05 , http://ci.nii.ac.jp/naid/10013707562
  • Electrochemical Properties of Self-assembled Monolayers with Tetracyanoanthraquinodimethane-disulfide as a New Electron Acceptor on Gold Electrode, Electrochemistry, 73, 1, 38, 40,   2005 01 , http://ci.nii.ac.jp/naid/40006588195
  • Electrochemical Properties of Tetrathiafulvalenyl-thiol,disulfide,thioacetate,and sulfide,and Their Self-Assembled Monolayers on Gold Surfaces, NAKAI Hidetaka, WATANABE Katsuhiko, ITO Seishiro, YOSHIHARA Masakuni, FUJIHARA Hisashi, 73, 7, 325, 329,   2000 07 20 , http://ci.nii.ac.jp/naid/10007151149
  • Electropolymerization of Tetrathiol-and Tetrapyrrole-Substituted Tetrathiafulvalene Derivatives and Electrochemical Properties of Their Electropolymerized Films, NAKAI Hidetaka, TSUCHIYA Youichi, WATANABE Katsuhiko, MATSUSHITA Tsuyoshi, ITO Seishiro, YOSHIHARA Masakuni, FUJIHARA Hisashi, 73, 4, 176, 181,   2000 04 20 , 10.4011/shikizai1937.73.176, http://ci.nii.ac.jp/naid/10007150706
  • Intercalation of Organic Phosphates and Chiral Amines into γ-Zirconium Phosphates, NISHI Masayuki, FUJIHARA Hisashi, KAWANAMI Hajime, ITO Seishiro, YOSHIHARA Masakuni, MAESHIMA Toshihisa, 71, 1, 8, 15,   1998 01 20 , 10.4011/shikizai1937.71.8, http://ci.nii.ac.jp/naid/10003730624
  • Michael Addition of Thioacetic Acid to α, β-Unsaturated Carboxylic Acid Esters in the Presence of Clays or Zeolites, NISHI Masayuki, FUJIHARA Hisashi, YOSHIHARA Masakuni, MAESHIMA Toshihisa, Journal of Japan Oil Chemists' Society, 46, 8, 899, 903,   1997 08 20 , 10.5650/jos1996.46.899, http://ci.nii.ac.jp/naid/10002273126
    Summary:The Michael addition of thioacetic acid to α, β-unsaturated carboxylic acid esters in the presence of clays or zeolites was carried out. Using clays for adding thioacetic acid to di-<I>l</I>-menthylfumarate (1), reactivity and stereoselectivity were found to differ according to the clay, clay pretreatment temperature and solvent, though with no systematic tendency. For S- (-) -2-methyl-1-butyl cinnamate (3) addition in the presence of zeolites of large pore size, adduct stereoselectivity was much greater. The reaction would thus appear to proceed in the cavities of the zeolites.
  • Synthesis and Application of γ-Zirconium Phosphates Modified with Chiral Amines, NISHI Masayuki, FUJIHARA Hisashi, YOSHIHARA Masakuni, MAESHIMA Toshihisa, Journal of Japan Oil Chemists' Society, 46, 8, 915, 919,   1997 08 20 , 10.5650/jos1996.46.915, http://ci.nii.ac.jp/naid/10002273176
    Summary:The intercalation of organic phosphate esters and chiral amines into layered γ-zirconium phosphate, Zr (HPO<SUB>4</SUB>)<SUB>2</SUB>·2H<SUB>2</SUB>O (abbreviated ZrP), was examined by powder X-ray diffraction, elemental analysis and IR spectroscopy. The results indicated basal spacings of ZrP intercalated with organic phosphate esters to enlarge in proportion to alkyl chain length. When chiral amines were further intercalated into ZrP derivatives, the basal spacings became slightly longer. The catalytic activity of the modified ZrP derivatives was investigated by adding thiol to enone. Enantiomeric excess was found to depend on the chiral amine employed and the alkyl chain length of organic phosphate.
  • Electrochemical property and catalytic action of Fe_2O_3 and TiO_2 organosols possessing adsorbed layer of surfactant, MATSUI Hideo, FUJIHARA Hisashi, ITO Seishiro, YOSHIHARA Masakuni, MAESHIMA Toshihisa, 70, 1, 17, 25,   1997 01 20 , 10.4011/shikizai1937.70.17, http://ci.nii.ac.jp/naid/10009826586
  • Synthesis and Application of Alumina Powders Modified with Carboxylic Acid, Matsui Hideo, Fujihara Hisashi, Ito Seishiro, Yoshihara Masakuni, Maeshima Toshihisa, Report of the Environmental Science Research Institute, Kinki University, 25, 149, 154,   1997 , http://ci.nii.ac.jp/naid/110000508568
  • Synthesis and Application of Magnesium Oxide Modified with Carboxylic Acids, Matsui Hideo, Fujihara Hisashi, Ito Seishiro, Yoshihara Masakuni, Maeshima Toshihisa, Report of the Environmental Science Research Institute, Kinki University, 25, 155, 162,   1997 , http://ci.nii.ac.jp/naid/110000508569
  • Electrochemical property and catalytic action of Fe_2O_3 and TiO_2 organosols possessing adsorbed layer of surfactant, Matsui Hideo, Fujihara Hisashi, Ito Seishiro, Yoshihara Masakuni, Maeshima Toshihisa, Report of the Environmental Science Research Institute, Kinki University, 25, 163, 171,   1997 , http://ci.nii.ac.jp/naid/110000508570
  • Synthesis and Application of Magnesium Oxide Modified with Carboxylic Acids, MATSUI Hideo, FUJIHARA Hisashi, ITO Seishiro, YOSHIHARA Masakuni, MAESHIMA Toshihisa, 69, 5, 299, 306,   1996 05 20 , 10.4011/shikizai1937.69.299, http://ci.nii.ac.jp/naid/10001817931
  • Synthesis and Application of Alumina Powders Modified with Carboxylic Acid, MATSUI Hideo, FUJIHARA Hisashi, ITO Seishiro, YOSHIHARA Masakuni, MAESHIMA Toshihisa, 69, 4, 215, 220,   1996 04 20 , 10.4011/shikizai1937.69.215, http://ci.nii.ac.jp/naid/10001817823
  • Enantioface differentiation in Free Radical Addition of Thiolacetic Acid or Mercaptoacetic Acid to Methyl Crotonate in the Presence of Chiral Substances, Yoshihara Masakuni, Nozaki Kenji, Fujihara Hisashi, Journal of the Faculty of Science and Technology, Kinki University, 16, 63, 65,   1981 03 20 , http://ci.nii.ac.jp/naid/110000940838