発表論文

■2016-

Pulsed EPR measurements on reaction rate constants for addition of photo-generated radicals to double bonds of diethyl fumarate and diethyl maleate
Hirona Takahashi, Kenta Hagiwara and Akio Kawai
Tokyo Institute of Technology
Molecular Physics, 114(21), 3093-3103 (2016)


Rate constant measurements for initial addition reactions of radicals at the propagation step of photo-polymerization as studied by pulsed EPR spectroscopy
Yusuke Miyakea,b, Yutaka Marushimaa, Hirona Takahashia, Nobuyki Akaia,c, Kazuhiko Shibuyaa, and Akio Kawaia*
aTokyo Institute of Technology, bKyoto Institute of Technology, cTokyo University of Agriculture and Technology
J. Phys. Org. Chem. 2016, 29, 468-475


■2015-

Addition Rate Constants of Phosphorus- and Carbon-Centered Radicals to Double Bond of Monomers as Studied by a Pulsed Electron Paramagnetic Resonance Method.
Hirona Takahashi1, Yutaka Marushima1,Kazuhide Tsuji2, Kazuhiko Shibuya1, and Akio Kawai1
1Tokyo Institute of Technology, 2National Institute of Technology, Gunma College
J. Phys. Chem. A, 2015, 119, 8261-8268


Temporal Behavior of the Singlet Molecular Oxygen Emission in Imidazolium and Morpholinium Ionic Liquids and Its Implications
Tsuyoshi Yoshida, Akio Kawai, Dinesh Chandra Khara1, and Anunay Samanta1
Tokyo Institute of Technology, 1University of Hyderabad
J. Phys. Chem. B, 2015, 119, 6696−6702


■2010-2014

Ionic Liquid Dependence of Triplet-Sensitized Photon Upconversion
Yoichi Murakami, Toshiyuki Ito, Akio Kawai
Tokyo Institute of Technology
J. Phys. Chem. B, 2014, 118, 14442-14451


Vaporization of Protic Ionic Liquids Studied by Matrix-Isolation Fourier Transform Infrared Spectroscopy
Mami Horikawa, Nobuyuki Akai1, Akio Kawai, and Kazuhiko Shibuya
Tokyo Institute of Technology, 1Tokyo University of Agriculture and Technology
J. Phys. Chem. A, 2014, 118, 3280−3287


Structure and Reactivity of Radicals Produced by Photocleavage of Oxime Ester Compounds Studied by Time-resolved Electron Paramagnetic Resonance Spectroscopy
Yusuke Miyake, Hirona Takahashi, Nobuyuki Akai1, Kazuhiko Shibuya, and Akio Kawai
Tokyo Institute of Technology, 1Tokyo University of Agriculture and Technology
Chem.Lett., 2014, 43,1275–1277


Pulsed EPR study on large dynamic electron polarisation created in the quenching of photo-excited xanthene dyes by nitroxide radicals in aqueous solutions
Hirona Takahashi, Masaki Iwama, Nobuyuki Akai1, Kazuhiko Shibuya and Akio Kawai
Tokyo Institute of Technology, 1Tokyo University of Agriculture and Technology
Molecular Physics, 112(7), 1012-1020 (2014)


Solvent-dependent Photoisomerization Quantum Yield of 2-Phenylazo-1-alkyl-3-methylimidazolium Cations in Ionic Liquids under S1(n, π*) Excitation
Tsuyoshi Yoshida, Tomoo Monji, Daiki Kawamori, Nobuyuki Akai1, Kazuhiko Shibuya, and Akio Kawai
Tokyo Institute of Technology, 1Tokyo University of Agriculture and Technology
Chem. Lett. 42(12), 1490-1492 (2013)


Solute Size-dependent Rotational Diffusion of Nitroxide Radicals in Ionic Liquids as Studied by EPR Spectroscopy
Yusuke Miyake1, Nobuyuki Akai2, Kazuhiko Shibuya, and Akio Kawai
1Hokkaido University, 2Tokyo University of Agriculture and Technology, Tokyo Institute of Technology Chem. Lett. 42(11), 1429-1431 (2013)


Photochemistry of the Ozone-Water Complex in Cryogenic Neon, Argon, and Krypton Matrixes
Masashi Tsuge, Kazuhide Tsuji1, Akio Kawai, Kazuhiko Shibuya
Tokyo Institute of Technology, 1Gunma National College of Technology J. Phys. Chem. A, 117(49), 13105-13111 (2013)


Kinetics of Photon Upconversion in Ionic Liquids: Time-Resolved Analysis of Delayed Fluorescence
Yoichi Murakami1, Hitomi Kikuchi, Akio Kawai
1Global Edge Institute, Tokyo Institute of Technology
J. Phys. Chem. B, 117(17), 5180-5187 (2013)


Charge-Transfer Electronic Absorption Spectra of 1‑Ethylpyridinium Cation and Halogen Anion Pairs in Dichloromethane and as Neat Ionic Liquids
Takahiro Ogura, Nobuyuki Akai1, Kazuhiko Shibuya, and Akio Kawai
Tokyo Institute of Technology, 1Tokyo University of Agriculture and Technology
J. Phys. Chem. B, 117, 8547−8554 (2013)


Kinetics of Photon Upconversion in Ionic Liquids: Energy Transfer between Sensitizer and Emitter Molecules
Yoichi Murakami1, Hitomi Kikuchi, and Akio Kawai
1Global Edge Institute, Tokyo Institute of Technology
J. Phys. Chem. B, 117 (8), 2487–2494 (2013)


Analysis of Low-Lying Gerade Rydberg States of Acetylene Using Two-Photon Resonance Fluorescence Excitation Spectroscopy
Kazuhide Tsuji1, Kentaro Misawa2, Junichi Awamura, Akio Kawai, and Kazuhiko Shibuya
1Gunma National College of Technology
2Chemical Resources Laboratory, Tokyo Institute of Technology
J. Phys. Chem. A, 117 (7), 1420–1427 (2013)


Gas phase electronic absorption spectroscopy of room temperature ionic liquids: N-Ethyl-3-methylpyridinium or 1-butyl-3-methylimidazolium cation with bis(trifluoromethylsulfonyl)amido anion
Takahiro Ogura, Nobuyuki Akai1, Akio Kawai, Kazuhiko Shibuya
1Tokyo University of Agriculture and Technology
Chem. Phys. Lett, 555, 110-114 (2013)


Intensity Enhancement of Weak O2 a1Δg → X3Σg– Emission at 1270 nm by Collisions with Foreign Gases
Takehiro Hidemori, Nobuyuki Akai, Akio Kawai, and Kazuhiko Shibuya
J. Phys. Chem. A, 116 (9), 2032–2038 (2012)


Red-light-induced Photoreaction of DMS-O3 Complex in a Cryogenic Neon Matrix
Daisuke Wakamatsu, Nobuyuki Akai, Akio Kawai, and Kazuhiko Shibuya
Chem. Lett. 2012, 41, 252-253


Isomerization dynamics of the 2-phenylazo-1,3-dimethylimidazolium cation photoexcited to the S2 (π, π*) state as studied by transient absorption spectroscopy in the time domain of 10-13 to 103 seconds
A. Ida, B. Cohen, T. Asaka, A. Kawai, J. A. Organero, K. Shibuya and A. Douhal
Phys. Chem. Chem. Phys. 13, 20318-20325 (2011)


Water assisted photo-oxidation from hydroquinone to p-benzoquinone in a solid Ne matrix
Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
J. Photochem. Photobio. A: Chem. 223, 182-188 (2011)


Hydrodynamic Interpretation on the Rotational Diffusion of Peroxylamine Disulfonate Solute Dissolved in Room Temperature Ionic Liquids As Studied by Electron Paramagnetic Resonance Spectroscopy
Yusuke Miyake, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
J. Phys. Chem. A 115, 6347-6356 (2011)


Ion-pair structure of vaporized ionic liquid studied by matrix-isolation FTIR spectroscopy with DFT calculation: A case of 1-ethyl-3-methylimidazolium trifluoromethanesulfonate
Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
J. Phys. Chem. A 114, 12662-12666 (2010)


Matrix-isolation infrered spectra of HOOBr and HOBrO produced upon VUV light irradiation of HBr/O2/Ne system
Nobuyuki Akai, Daisuke Wakamatsu, Takeo Yoshinobu, Akio Kawai and Kazuhiko Shibuya
Chem. Phys. Lett. 499, 117-120 (2010)


Kinetic study on the photoabsorption process of gaseous O2 dimol at 630nm in a wide pressure range
Akira Ida, Eiji Furui, Nobuyuki Akai, Akio Kawai and Kazuhiko Shibuya
Chem. Phys. Lett. 488, 130-134 (2010)


Photochromic Reaction of a Novel Room Temperature Ionic Liquid: 2-Phenylazo-1-hexyl-3-methylimidazolium Bis(pentafluoroethylsulfonyl)amide
Akio Kawai, Daiki Kawamori, Tomoo Monji, Tooru Asaka, Nobuyuki Akai and Kazuhiko Shibuya
Chem. Lett. 39, 230-231 (2010)


Photochromism of 3-butyl-1-methyl-2-phenylazoimidazolium in room temperature ionic liquids
Tooru Asaka, Nobuyuki Akai, Akio Kawai and Kazuhiko Shibuya
J. Photochem. Photobio. A: Chem. 209, 12-18 (2010)


■2008-2009

Infrared Spectroscopy and Quantum Chemical Calculations of OH-(H2O)n Complexes
Kazuhide Tsuji and Kazuhiko Shibuya
J. Phys. Chem. A 113, 9945-9951 (2009)


Neon matrix-isolation infrared spectrum of HOOCl measured upon the VUV-light irradiation of an HCl/O2 mixture
Takeo Yoshinobu, Nobuyuki Akai, Akio Kawai and Kazuhiko Shibuya
Chem. Phys. Lett., 477(1-3), 70-74 (2009)


Observation of collision-induced near-IR emission of singlet oxygen O2 a1?g generated by visible light excitation of gaseous O2 dimol
Eiji Furui, Nobuyuki Akai, Akira Ida, Akio Kawai, Kazuhiko Shibuya
Chem. Phys. Lett. 471, 45-49 (2009)


Cryogenic Neon Matrix-Isolation FTIR Spectroscopy of Evaporated Ionic Liquids: Geometrical Structure of Cation-Anion 1:1 Pair in the Gas phase
Nobuyuki Akai, David Parazs, Akio Kawai, Kazuhiko Shibuya
J. Phys. Chem. B 113, 4756-4762 (2009)


EPR Study of Rotational Diffusion in Viscous Ionic Liquids: Analysis by a Fractional Stokes?Einstein?Debye Law
Yusuke Miyake, Takehiro Hidemori, Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya, Shinichi Koguchi, Tomoya Kitazume
Chem. Letters., 38(2), 124-125 (2009)


First observation of the matrix-isolated FTIR spectrum of vaporized ionic liquid: and example of emimTFSI, 1-Ethyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide
Nobuyuki Akai, Akio Kawai, Kazuhiko Shibuya
Chem. Letters., 37(3), 256-257 (2008)