論文

• Nobuyuki Akai, Akio Kawai, KAZUHIKO SHIBUYA. Ion-pair structure of vaporized ionic liquid studied by matrix-isolation FTIR spectroscopy with DFT calculation: A case of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate, Vol. 114, p. 12662-12666, Dec. 2010.
• Nobuyuki Akai, Daisuke Wakamatsu, Akio Kawai, KAZUHIKO SHIBUYA. Matrix-isolation infrared spectra of HOOBr and HOBrO produced upon VUV light irradiation of HBr/O2/Ne system, Chemical physics letters, Vol. 499, p. 117-120, Oct. 2010.
• T.Yoshinobu, N.Akai, A.Kawai, K.Shibuya. Neon matrix-isolation infrared spectrum of measured upon VUV-light irradiation of an HCl/O₂ mixture, Chemical Physics Letters, elsevier, Vol. 477, p. 70-74, July 2009.
• Eiji Furui, Nobuyuki Akai, Akira Ida, Akio Kawai, KAZUHIKO SHIBUYA. Observation of collision-induced near-IR emission of singlet oxygen O₂ a¹∆_g generated by visible light excitation of gaseous O₂ dimol, Chemical Physics Letters, elsevier, Vol. 471, p. 45-49, Mar. 2009.
• Yusuke Miyake, Takehiro Hidemori, Nobuyuki Akai, Akio Kawai, KAZUHIKO SHIBUYA, Shinichi Koguchi, TOMOYA KITAZUME. EPR Study of Rotational Diffusion in Viscous Ionic Liquids: Analysis by a Fractional Stokes–Einstein–Debye Law, Chemistry letters, 日本化学会, Vol. 38, p. 124-125, Feb. 2009.
• Nobuyuki Akai, David Parazs, Akio Kawai, KAZUHIKO SHIBUYA. Cryogenic Neon Matrix-Isolation FTIR Spectroscopy of Evaporated Ionic Liquids: Geometrical Structure of Cation-Anion 1:1 Pair in the Gas Phase, Journal of Physical Chemistry B, ACS, Vol. 113, p. 4756-4762, Feb. 2009.
• Keiichi Ohno, Takafumi Shimoaka, Nobuyuki Akai, Yukiteru Katsumoto. Relationship between the Broad OH Stretching Band of Methanol and Hydrogen-Bonding Patterns in the Liquid Phase, Journal of physical chemistry A, ACS, Vol. 112, No. 32, Page 7342-7348, July 2008.
• Nobuyuki Akai, Akio Kawai, KAZUHIKO SHIBUYA. First Observation of the Matrix-isolated FTIR Spectrum of Vaporized Ionic Liquid: An Example of EmimTFSI, 1-Ethyl-3-methylimidazolium Bis(trifluoromethanesulfonyl)imide, Chemistry Letters, 日本化学会, Vol. 37, No. 3, Page 256, Feb. 2008.
• N. Akai, K. Ohno, M. Aida. photochemistry of 2-(methylamino)pyridine in a low-temperature argon matrix: amino-imino tautomerism and rotational isomerism, J. Photochem. Photobiol. A, Vol. 187, pp. 113-118, 2007.
• T. Itoh, N. Akai, K. Ohno. Infrared spectra of p-, m- and o-fluorobenzaldehyde in low temperature argon matrices, J. Mol. Struct., Vol. 786, pp. 39-45, 2006.
• N. Akai, T. Harada, K. Shin-ya, K. Ohno, M. Aida. Photoinduced Amino-Imino Tautomerism: An Infrared Study of 2-Amino-5-methylpyridine in a Low-Temperature Argon Matrix, J. Phys. Chem. A, Vol. 110, pp. 6016-6022, 2006.
• N. Akai, H. Yoshida, K. Ohno, M. Aida. Photochemistry of p-toluidine in a low-temperature argon matrix: infrared spectrum and geometrical structure of 4-methylaniino radical, Chem. Phys. Lett., Vol. 403, pp. 390-395, 2005.
• K. Ujike, N. Akai, S. Kudoh, M. Nakata. Photoisomerization and photocyclization of 3,5-cyclohexadiene-1,2-diimine and its methyl-substituted derivatives in low-temperature argon matrices, J. Mol. Struct., Vol. 735-736, pp. 335-342, 2005.
• N. Akai, S. Kudoh, M. Nakata. Hydrogen-atom migration and Wolff rearrangement in photolysis of chlorohydroquinone to produce p-benzoquinone and 3-hydroxy-2,4-cyclopentadiene-1-ylidenemethanone, J. Photochem. Photobiol. A, Vol. 169, pp. 47-55, 2005.
• K. Ohno, M. Okimura, N. Akai, Y. Katsumoto. The effect of cooperative hydrogen bonding on the OH stretching-band shift for water clusters studied by matrix-isolation infrared spectroscopy and density functional theory, Phys. Chem. Chem. Phys., Vol. 7, pp. 3005-3014, 2005.
• N. Akai, Y. Katsumoto, K. Ohno, M. Aida. Vibrational anharmonicity of acetic acid studied by matrix-isolation near-infrared spectroscopy and DFT calculation, Chem. Phys. Lett., Vol. 413, pp. 367-372, 2005.
• N. Akai. Infrared spectra of photoinduced excited transition species by matrix-isolation method, Bunko Kenkyu, Vol. 54, pp. 342-348, 2005.
• N. Akai, K. Ohno, M. Aida. Photoinduced amino-imino tautomerism of 2-aminopyridine in a low-temperature argon matrix, Chem. Phys. Lett., Vol. 413, pp. 306-310, 2005.
• N. Akai, D. Negishi, S. Kudoh, M. Takayanagi, M. Nakata. Infrared spectrum and molecular structure of lowest electronically excited triplet state of 1,4-dicyano-2,3,5,6-tetrafluorobenzene in low-temperature matrices, J. Mol. Struct., Vol. 688, pp. 177-183, 2004.
• M. Nagata, Y. Futami, N. Akai, S. Kudoh, M. Nakata. Structure and infrared spectrum of 2-hydroxyphenyl radical, Chem. Phys. Lett., Vol. 392, pp. 259-264, 2004.
• N. Akai, S. Kudoh, M. Nakata. Matrix-isolation infrared spectrum and optimized structure of 2,3-dicyanonaphthalene in the T1 state, Chem. Phys. Lett., Vol. 392, pp. 480-485, 2004.
• N. Akai, S. Kudoh, M. Nakata. Experimental and theoretical study of a new C10N8 compound. Reversible photoisomerization between 2,3,6,7-tetracyano-1,4,5,8-tetraazanapthalene and 4,5,9,10-tetracyano-1,3,6,8-tetraazacyclodeca-1,2,4,6,7,9-hexaene in low-temperature rare-gas matrices, Chem. Phys. Lett., Vol. 375, pp. 605-611, 2003.
• N. Akai, I. Miura, S. Kudoh, K. Shigehara, M. Nakata. Lowest Electronically Excited Triplet States of 1,2,4,5-Tetracyanobenzene and Tetracyanopyrazine by Matrix-Isolation Infrared Spectroscopy Combined with a Density-Functional-Theory Calculation, Bull. Chem. Soc. Jpn., Vol. 76, pp. 1927-1938, 2003.
• N. Akai, S. Kudoh, M. Nakata. UV photolysis of 1,4-diaminobenzene in a low-temperature argon matrix to 2,5-cyclohexadiene-1,4-diimine via 4-aminoanilino radical, J. Phys. Chem. A, Vol. 107, pp. 6725-6730, 2003.
• N. Akai, S. Kudoh, M. Nakata. Photoisomerization and tunneling isomerization of tetrachlorohydroquinone in a low-temperature argon matrix, J. Phys. Chem. A, Vol. 107, pp. 3655-3659, 2003.
• N. Akai, S. Kudoh, M. Nakata. Methyl-group move in the low-temperature rare-gas matrices and conformational analysis of 1,4-dimethoxybenzene, J. Phys. Chem. A, Vol. 107, pp. 2635-2641, 2003.
• N. Akai, S. Kudoh, M. Nakata. Lowest excited triplet states of 1,2- and 1,4-dicyanobenzenes by low-temperature matrix-isolation infrared spectroscopy and density-functional-theory calculation, Chem. Phys. Lett., Vol. 371, pp. 655-661, 2003.
• N. Akai, S. Kudoh, M. Takayanagi, M. Nakata. Hydrogen-atom tunneling of 2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone in a low-temperature argon matrix studied by FTIR spectroscopy, J. Phys. Chem. A, Vol. 106, pp. 11029-11033, 2002.
• N. Akai, S. Kudoh, M. Takayanagi, M. Nakata. Photoreaction mechanisms of 2-bromophenols studied by low-temperature matrix-isolation infrared spectroscopy and density-functional-theory calculation, Chem. Phys. Lett., Vol. 363, pp. 591-597, 2002.
• N. Akai, S. Kudoh, M. Takayanagi, M. Nakata. Photoinduced rotational isomerization mechanism of 2-chlorobenzaldehyde in low-temperature rare-gas matrices by vibrational and electronic spectroscopies, J. Photochem. Photobiol. A, Vol. 150, pp. 93-100, 2002.
• N. Akai, S. Kudoh, M. Takayanagi, M. Nakata. Cis-trans isomerization equilibrium in hydroquinone in low-temperature argon and xenon matrices studied by FTIR spectroscopy, Chem.Phys.Lett., Vol. 356, pp. 133-139, 2002.
• N. Akai, S. Kudoh, M. Takayanagi, M. Nakata. Photoreaction mechanisms of 2-chlorophenol and its multiple chloro-substituted derivatives studied by low-temperature matrix-isolation infrared spectroscopy and density-functional-theory calculations, J. Photochem. Photobiol. A, Vol. 146, pp. 49-57, 2001.

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