論文

• Terufumi Takayama, Masaki Kawano, Hidehiro Uekusa, Yuji Ohashi, Tadashi Sugawara. Crystalline-State Photoreaction of 1-Azido-2-nitrobenzene - Direct Observation of Heterocycle Formation by X-Ray Crystallography, Helv. Chim. Acta, Vol. 86, pp. 1352-1358, 2003.
• Katsuhiro Kobayashi, Hiroshi Fukuda, Akiko Sekine, Hidehiro Uekuda, Yuji Ohashi. Physicochemical and Crystal Structure Analyses of the Antidiabestic Agent Troglitazone, Chem. Phram. Bull., Vol. 51, pp. 807-814, 2003.
• Takaaki Hosoya, Hidehiro Uekusa, Yuji Ohashi, Takashi Ohhara, Hiroyuki Kimura, Yukio Noda. Deuterium Migration Mechanism in Chiral Thiolactam Formation by Neutron Diffraction Analysis, Chem. Lett., Vol. 32, pp. 742-743, 2003.
• Yoshiki Ozawa, Madoka Terashima, Minoru Mitsumi, Koshiro Toriumi, Nobuhiro Yasuda, Hidehiro Uekusa, Yuji Ohashi. Photoexcited Crystallography of Diplatinum Complex by Multiple-exposure IP Method, Chem.Lett., Vol. 2003, pp. 62-63, 2003.
• Masaki Kawano, Terufumi Takayama, Hidehiro Uekusa, Yuji Ohashi, Yoshiki Ozawa, Koudatsu Matsubara, Hidekazu Imabayashi, Minoru Mitsumi, Koshiro Toriumi. Structure Analysis of Photo-induced Triplet Phenylnitrene Using Synchrotron Radiation, Chem. Lett., Vol. 32, pp. 922-923, 2003.
• Nahoko Iimura, Hirotaka Hirata, Yuji Ohashi. Crystalline Molecular Complexes of 1-Alkylpyridinium Bromide with Aromatic Compounds, Bull. Chem. Soc. Jpn., Vol. 75, pp. 71-75, 2002.
• Akiko Sekine, Hidehiro Uekusa, Yuji Ohashi, Kimihiro Yoshimura, Mikio Yagi, Jiro Higuchi. 4-Nitro-9,10-dihydrophenanthrene and a polymorphic form of 4-nitroohenanthrene, Acta Cryst., Vol. C57, pp. 1462-1464, 2002.
• Champika Vithana, Hidehiro Uekusa, Sekine Akiko, Yuji Ohashi. Modified photoreactivity due to mixed crystal fromation. I. Three mixed crystals between isostructural cobaloxime complexes, Acta Cryst., Vol. B58, pp. 227-232, 2002.
• Pance Naumov, Akiko Sekine, Hidehiro Uekusa, Yuji Ohashi. Structure of the Photocolored 2-(2',4'-Dinitrobenzyl)pyridine Crystal: Two Photon Induced Solid-State Proton Transfer with Minor Structural Perturbation, J. Am. Chem. Soc., Vol. 124, pp. 8540-8541, 2002.
• Takaaki Hosoya, Takashi Ohhara, Hidehiro Uekusa, Yuji Ohashi. Crystalline-State Photoisomerization of a,b-Unsaturated Thioamide Analyzed by X-rays, Bull. Chem. Soc. Jpn., Vol. 75, pp. 2147-2151, 2002.
• Adriana Paulovicova, Usama El-Ayaan, Kayoko Umezawa, Champika Vithana, Yuji Ohashi, Yutaka Fukuda. Synthesis and structural studies of diamagnetic first-row transition metal complexes with the rigid nitrogen ligand: bis[N-(2,6-diisopropylphenyl)imino]acenaththene, Inorg. Chim. Acta, Vol. 339, pp. 209-214, 2002.
• Takashi Ohhara, Susumu Ikeda, Hiroyuki Imura, Hidehiro Uekusa, Yuji Ohashi, Ichiro Tanaka, Nobuo Niimura. Direct Observation of Deuterium Migration in Crystalline-State Reaction by Single Crystal Neutron Diffraction IV. Hula-Twist Rotation of a Long Alkyl Radical Produced by Photoirradaition, J. Am. Chem. Soc., Vol. 124, pp. 14736-14740, 2002.
• S. Toyoda, T. Nakagawa, M. Kotani, H. Uekusa, Y. Ohashi. Preparation and Separation of All Possible Rotamers of a Stereochemical Analog of meso-Tartaric Acid: Optically Inactive and Optically Active Isomers of (R,S)-2,2'-Bis-(methoxycarbonyl)-6,6'-dimethyl-9,9'-bitriptycyl, Tetrahedron, Vol. 58, pp. 10345-10351, 2002.
• Champika Vithana, Hidehiro Uekusa, Akiko Sekine, Yuji Ohashi. Modified photoreactivity due to mixed crystal formation. II. Enhanced reactivity upon conformational mimicry and cavity enlargement, Acta Cryst., Vol. B58, pp. 986-997, 2002.
• Nobuhiro Yasuda, Masaki Kanazawa, Hidehiro Uekusa, Yuji Ohashi. Excited-state Structure of a Platinum Complex by X-ray Analysis, Chem. Lett., Vol. 2002, pp. 1132-1133, 2002.
• Masaki Kawano, Yoshiki Ozawa, Koutatsu Matsubara, Hidekazu Imabayashi, Minoru Mitsumi, Koshiro Toriumi, Yuji Ohashi. Synchrotron Radiation Structure Analyses of the Light-induced Radical Pair of a Hexaarylbiimidazolyl Derivative. Origin of the Spin-Multiplicity Change, Chem. Lett., Vol. 2002, pp. 1130-1131, 2002.
• Masaki Kawano, Katsuyuki Hirai, Hideo Tomioka, Yuji Ohashi. Structure Analysis of a Transient Triplet Carbene Trapped in a Crystal, J. Am. Chem. Soc., Vol. 123, pp. 6904-6908, 2001.
• Jiro Abe, Tomokatsu Sano, Masaki Kawano, Yuji Ohashi, Michio M. Matsusita, Tomokazu Iyoda. EPR and Density Functional Studies of Light-Induced Radical pairs in a Single crystal of a Hexaarylbiimidazolyl Derivative, Angew. Chem. Int. Ed., Vol. 40, No. 3, pp. 580-582, 2001.
• Kunio Mochida, Tohru Wada, Kaoru Suzuki, Wakako Hatanaka, Yuriko Nishiyama, Masato Nanjo, Akiko Sekine, Yuji Ohashi, Masato Sakamoto, Akio Yamamoto. Platinum=catalyzed Bis-Germylation of Alkynes with Organodigermanes and Cyclic Oligogermanes, Bull. Chem. Soc. Jpn., Vol. 74, pp. 123-137, 2001.
• Champika Vithana, Hidehiro Uekusa, Akiko Sekine, Yuji Ohashi. Successive Crystalline-state Photoisomerization of the 4-Cyanoethyl Group in a Cobaloxime Complex, Bull. Chem. Soc. Jpn., Vol. 74, pp. 287-292, 2001.
• Yoshiki Ohgo, Yuji Ohashi, Mitsuru Shida, Meiko Hasegawa, Yoshifusa Arai, Seiji Takeuchi, Yoshiaki Ohgo. [2-(N,N-Dimethylcarbamoyl)ethyl][bis(dimethylglyoximato)[(R)-1-phenylethylamine]cobalt(III), Acta Cryst., Vol. E57, pp. m62, 2001.
• Yuji Ohashi, Goichi Iketani, Hidehiro Uekusa. Direct Observation of Steric Hindrance in the Process of Photoisomerization of Cobaloxime Complexes, Mol. Cryst. liq. Cryst., Vol. 356, pp. 53-60, 2001.
• Yoshiki Ohgo, Yuji Ohashi, Meiko Hasegawa, Mitsuru Shida, Yoshifusa Arai, Seiji Takeuchi, Yoshiaki Ohgo. The Role of hydrogen Bond and crystal Solvent in the Solid-state (b - a) Photoisomerization of Novel 2-(N-Phenylcarbamoyl)ethyl Cobaloxime Complexes, Supramol. Chem., Vol. 13, pp. 25-34, 2001.
• Hiroyuki Imura, Takashi Ohhara, Hidehiro Uekusa, Tomoji Ozeki, Yuji Ohashi, Ichiro Tanaka, Nobuo Niimura. Analysis of Crystalline-State Photo Racemization of a Cobaloxime Complex Containing Bulky Substituents, J. Phys. Soc. Jpm., Vol. 70, No. Suppl. A, pp. 380-382, 2001.
• Takashi Ohhara, Hidehiro Uekusa, Yuji Ohashi, Ichiro Tanaka, Shintaro Kumazawa, Nobuo Niimura. Dirct observation of deuterium migration in crystalline-state reaction by single-crystal neutron diffraction III. Photoracemization of 1-cyanoethyl cobaloxime complexes, Acta Cryst., Vol. B57, pp. 551-559, 2001.
• Tomoji Ozeki, Katsuhiro Kusaka, Noritake Honma, Yuji Nakamura, Setsuko Nakamura, Shunsuke Oike, Nobuhiro Yasuda, Hiroyuki Imura, Hidehiro Uekusa, Maiko Isshiki. Crystal Structure Analysis of a Hexatungstate by a High-Energy Diffraction Experiment Using an Imaging Plate Weissenberg Camera at the BL04B2 Beamline of SPring-8, Chem. Lett., pp. 804-805, 2001.
• Takashi Ohhara, Hidehiro Uekusa, Tomoji Ozeki, Yuji Ohashi, Ichiro Tanaka, Nobuo Niimura. Single Crystal Neutron Diffraction Study of the 3-2-1 Two-step Photoisomerization of 3-Cyanopropyl Cobaloxime Complex, J. Phys. Soc. Jpn., Vol. 70, No. Suppl. A, pp. 377-379, 2001.
• Atsuhiko Ochi, Hidehiro Uekusa, Toru Tanimori, Yuji Ohashi, Hidenori Toyokawa, Yuji Nishi, Yasuro Nishi, Tsutomu Nagayoshi, Satoshi Koishi. Rapid X-ray crystal structure analysis in few second measurements using microstrip gas chamber, Nucl. Inst. & Met. Phys. Res., Vol. A467-468, pp. 1148-1151, 2001.
• Yoshiki Ohgo, Yuji Ohashi, Mieko Hagiwara, Mitsuru Shida, Yoshifusa Arai, Seiji takeuchi, Yoshiaki Ohgo. (2-carbamoylethyl)bis(dimethylglyoximato-N,N')[(R)-1-(1-naphthyl)ethylamine]cobaloxime(III) ethanol solvate and bis(dimethylglyoximato-N,N')[2-(N-methylcarbamoyl)ethyl][methyl-(S)-phenylalaninato-N]cobalt(III), Acta Cryst., Vol. C56, pp. 1062-1064, 2000.
• Masaki Kawano, Tomokatsu Sano, Jiro Abe, Yuji Ohashi. In situ Observation of Molecular Swapping in a Crystal by X-ray Analysis, Chem. Lett.,, pp. 1372-1373, 2000.
• Takashi Ohhara, Jun Harada, Yuji Ohashi, Ichiro Tanaka, Shintaro Kumazawa, Nobuo Niimura. Direct observation of deuterium migration in crystalline state reaction by single-crystal neutron diffraction. II. 3-1 Photoisomarization of a cobaloxime complex, Acta Cryst, Vol. B56, pp. 245-253, 2000.
• Nahoko IImura, Yuji Ohashi, Hirotaka Hirata. Complex Formation of Perfumes with Cataionic Surfactants and the Enhanced Thermal Stability, Bull. Chem. Soc. Jpn.,, Vol. 73, pp. 1097-1103, 2000.
• M. Hanaya, H. Shibazaki, M. Oguni, T. Nemoto, Y. Ohashi. Orientational ordering/disordering of ions accompanied by phase transition in pyridinium tetrafluoroborate crystal, J. Phys. Cheｍ. Solid,, Vol. 61, pp. 651-657, 2000.
• Daisuke Hashizune, Yuji Ohashi. Optical enrichment in chiral crystal environment of [(R,S)-1-cyanoethyl][methyl-(S)-alaninate]cobaloxime complex only by photoirradiation, J. Phys. Org. Chem.,, Vol. 13, pp. 415-421, 2000.
• Masaki Kawano, Ayako Ishikawa, Yoshiyuki Morioka, Hiroshi Tomizawa, Eiichi Miki, Yuji Ohashi. X-Ray diffraction and spectroscopic studies of the light-induced metastable state of an ethylenediamine nitrosyl ruthenium complex, J. Chem. Soc.,, pp. 2425-2431, 2000.
• Tsuneo Koura, Yuji Ohashi. Asymmetric Induction in Cobaloxime Complex Crystals Due to Chiral Crystal Enviroment, Tetrahedron, Vol. 56, pp. 6769-6779, 2000.
• N. Suzuki, T. Higuchi, Y. Urano, K. Kikuchi, H. Uekusa, Y. Ohashi, T. Uchida, T. Kitagawa, T. Nagano. Novel Iron Porphyrin-Alkanethiolate Complex with Intramolecular NS...S Hydrogen Bond: Synthesis, Spectroscopy, and Reactivity, J. Am. Chem. Soc.,, Vol. 121, pp. 11571-11572, 1999.
• Yoshihiro Yokoyama, Yuji Ohashi. Crystal and Molecular structure of Methoxy and Methylthio Compounds, Bull. Chem. Soc. Jpn.,, Vol. 72, pp. 2183-2191, 1999.
• Nahoko Iimura, Keiju Sawada, Yuji Ohashi, Hirotaka Hirata. Complex Formation between Cationic Surfactant and Insoluble Drugs, Bull. Chem. Soc. Jpn.,, Vol. 72, pp. 2417-2422, 1999.
• YUJI OHASHI. Solid State Photoisomerization of But-3-en-1-yl Group in Cobalt Complexes, Bull. Chem. Soc. Jpn., Vol. 71, pp. 2527-2537, 1998.
• YUJI OHASHI. Crystalline-State Racemization of Cobaloxime Complex. XX. Cooperative Motion of Solvent Molecule, Enantiomer, Vol. 3, pp. 159-168, 1998.
• YUJI OHASHI. Variation of the reaction rate in the solid-state photoisomerization of cobaloxime complexes by forming host-guest complexes, J. Chem Soc. Perkin Trans., Vol. 2, pp. 1931-1935, 1998.
• YUJI OHASHI. A Unique Crystalline-State Reaction of an Overcrowded Distibene with Molecular Oxygen : The First Example of a Single Crystal to a Single Crystal Reaction with an External Reagent, J. Am. Chem. Soc., Vol. 120, pp. 433-434, 1998.
• YUJI OHASHI. Crystal Structure of Acrylonitrile, Bull. Chem. Soc. Jpn., pp. 345-348, 1998.
• YUJI OHASHI. X-Ray Analyses of Complexes Formed between Surfactants and Aromatic Coumpounds. I. A Common Structural Pattern of the Complexes, Bull. Chem. Soc. Jpn., Vol. 71, pp. 2109-2118, 1998.
• YUJI OHASHI. X-ray Analysis of Successive Reaction in Crystalline State Photoisomerization of Cobaloxime Complexes, Mol. Cryst. Liq. Cryst., Vol. 313, pp. 321-326, 1998.
• YUJI OHASHI. Direct Observation of Correlation between Crystalline-State Deuterium Transfer and Racemization of 1-Cyanoethylcobaloxime Complex by Neutron Diffraction, Chem. Lett., pp. 365-366, 1998.
• YUJI OHASHI. Analysis of hydrogen-Deuterium Exchange Reaction in a Crystal by Neutron Diffraction, Enautiomer, Vol. 2, pp. 241, 1997.
• YUJI OHASHI. Crystalline-state β-α photoisomerization of cobaloxime complexes, part 1 Generation of asymmetry in chiral crystal environment, J. Organomet. Chem., Vol. 536-537, pp. 389-398, 1997.
• YUJI OHASHI. Crystal and Molecular Structure of 1,2-Dimethoxyethane Crystallized on a New Diffractometer, Chemistry Letters(Chem. Lett. ), pp. 443, 1996.
• YUJI OHASHI. Four polymorphs of a cobaloxime complex with different solid-state photoisomerization rates, Acta Crystallographica, Vol. B52, pp. 303, 1996.
• YUJI OHASHI. Analysis of a fast crystalline-state reaction by a new diffractometer designed for rapid data collection, Journal of Molecular Structure, Vol. 374, pp. 37, 1996.
• YUJI OHASHI. β-α Photoisomerization of Cobaloxime Complexes in the Solid State. 5. Reaction Rate Reduced by a Hydrogen Bond, Bulletin of the Chemical Society of Japan(Bull. Chem. Soc. Jpn. ), Vol. 69, pp. 3107, 1996.
• YUJI OHASHI. Reactivity in molecular crystal, Currens Opinion in Solid State & Material Science, Vol. 1, pp. 522, 1996.
• YUJI OHASHI. Mechanism of asymmetric photocyclization of α-oxoamides, Journal of the Chemical Society Perkin Transaction 2, pp. 61, 1996.

著書

• 大橋裕二, 植草秀裕, 大原高志, 小島優子, 根本隆. Ｘ線・中性子による構造解析, 東京化学同人, Dec. 2015.
• Yuji Ohashi. Crystallography Across the Sciences, International Union of Crystallography, International Union of Crystallography, pp. 842-849, 1998.
• YUJI OHASHI. Correlations, Transformations, and Intuactims in Organic Crystal Chemistry (共著), Oxford Science Publications, Oxford Science Publications, 1994.
• YUJI OHASHI. Reactivity in Molecular Crystals (編者,共著), Kodansha-VCH, Kodansha-VCH, 1993.
• YUJI OHASHI. Bookseries of Experiments in chemistry Diffraction, Maruzen, Maruzen, 1992.

特許など

• 大橋裕二, 植草秀裕, 藤田　佳孝, 小野　和男, 肥高　友也. チタン化合物の微粒子を含む分散体の製造方法. 特許. 登録. 国立大学法人東京工業大学, 日本曹達株式会社. 2004/09/06. 特願2004-258621. 2006/03/16. 特開2006-069876. 特許第4585256号. 2010/09/10 2010.

学位論文

• Structural Studies of Intermediate State,  本文,  Doctor of Theology,  東京大学,  1974/--/--, 

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