1995 Fiscal Year Annual Research Report

凝縮相における光反応ダイナミックス

Research Project

Project/Area Number	06239101
Research Institution	Gunma University
Principal Investigator	閑春夫群馬大学, 工学部, 教授 (40008454)
Co-Investigator(Kenkyū-buntansha)	小山泰関西学院大学, 理学部, 教授 (90079666) 増原宏大阪大学, 工学部, 教授 (60029551) 大野健大阪大学, 理学部, 教授 (10029697) 濱之上熊男京都工芸繊維大学, 工芸学部, 教授 (30025374)
Keywords	光反応 / 励起状態 / 水素原子移動 / プロトン移動 / 電子移動 / 蛍光 / トンネル効果
Research Abstract	1.凝縮相における光反応過程の研究(群馬大・工・閑春夫) レーザー光分解法による種々の分子の励起状態及び基底状態における水素原子移動、プロトン移動、電子移動についてその反応機構を明らかにした。特に分子内水素原子移動がトンネル効果によりおこることを実験および理論面から解明することに成功した。 2.凝縮相における超高速励起状態緩和過程(京都工繊大・工芸・濱之上熊男) 構造的に大きな歪みをもつ「6」-1,4-シクロアントラキノンの最低励起一重項状態及び三重項状態において分子内水素原子移動により生ずる基底一重項ビラジカルとそのメタイド間は10ピコ秒のうちに平衡が成立つことを見出した。また9-ニトロアントラセンのフェムト秒レーザーホトリシスにより、その光分解過程を解明した。 3.固溶体における光電子移動反応(阪大・理・大野健) Ru(II)-Rh(III)錯体結晶の電荷移動励起状態では、電子移動による分子内原子の再配列は分子内振動数(10^<13>-10^<14>s^<-1>)で起こり、生じたRh(III)錯体のd電子励起状態は10^<10>-10^<11>s^<-1>で失活することがわかった。 4.表面・界面における動的分子間相互作用(阪大・工・増原宏) 微小領域の新測定法として近視野光学顕微鏡を設置し、100nmの蛍光性高分子微粒子を分散したPVAフィルムの蛍光イメージングを行い、空間分解能210nmが得られた。また単一微粒子の光退色化に成功した。 5.時間分解ラマン分光法による光合成初期過程の研究(関西学院大学・理・小山泰) 光合成色素(クロロフィル・カテノイド・レチノイド)について時間分解ラマン分光法及び時間分解NMR法を用いて励起状態の性質(特に振動解析)と構造を明らかにした。

Research Products
(57 results)

All Other

All Publications (57 results)

[Publications] T. Arai, S. Tobita, and H. Shizuka: "Tunnelling effects on the 1,3-and 1,5-sigmatropic hydrogen shifts in the ground state of photo-Fries rearranged intermediates of phenyl acetate studied by laser flash photolysis." J. Am. Chem. Soc.,. 117. 3968-3975 (1995)
[Publications] M. Yamaji, T. Kiyota, S. Kimura, and H. Shizuka: "Laser flash photolysis studies on the interaction between triplet benzophenone and naphtholate anions. Electron transfer or triplet energy transfer?" Chem. Pphys. Letters. 237. 419-424 (1995)
[Publications] I. Amada, M. Yamaji, M. Sase, and H. Shizuka: "Laser flash photolysis studies on hydrogen atom abstraction from phenol by triplet naphthoquinones in acetonitrile." J. Chem. Soc. Faraday Trans.91. 2751-2759 (1995)
[Publications] S. Tobita, J. Ohba, K. Nakagawa, and H. Shizuka: "Recovery mechanisms of the reaction intermediate produced by photo-induced cleavage of the intramolecular hydrogen bond of dibenzoylmethane." J. Photochem. Photobiol. A. Chem.92. 61-67 (1995)
[Publications] Y. Nakamura, T. Minowa, S. Tobita H. Shizuka, and J. Nishimura: "Synthesis and electronic properties of C_<60>-o-quinodimethane adducts." J. Chem. Soc. Perkin Trans. 2. 2351-2357 (1995)
[Publications] T. Kiyota, M. Yamaji, and H. Shizuka: "Hydrogen-bonding induced electron transfer from triplet N, N-dialkyl-1-naphthylamines to benzophenone via triplet exciplexes." J. Phys. Chem.100. 672-679 (1996)
[Publications] I. Amada, M. Yamaji, S. Tsunoda, and H. Shizuka: "Laser photolysis studies on electron transfer between triplet naphthoquinones and amines" J. Photochem. Photobiol. A. Chem.(in press).
[Publications] Y. Nakamura, T. Minowa, Y. Hayashida, S. Tobita, H. Shizuka, and J. Nishimura: "Relaxation processes in the excited state of C_<60>-o-quinodimethane adducts." J. Chem. Soc. Faraday Trans.(in press).
[Publications] Y. Nakamura, T. suihiji, T. Mita, T. Minowa, S. Tobita, H. Shizuka, and J. Nishimura: "Synthesis, structure, and electronic structure of syn-[2.2] phenanthrenophanes: First observation of their excimer fluorescence at high temperature." J. Am. Chem. Soc.(in press).
[Publications] A. K. Mishra and H. Shizuka: "Temperature effects on dual emission from ion pairs produced by excited-state proton transfer in the 1-naphthol-triethylamine system." J. Chem. Soc. Faraday Trans.(in press).
[Publications] F. Saito, S. Tobita, and H. Shizuka: "Photophysical and photochemical processes of aniline in cyclohexane and aqueous solution." J. Phys. Chem.(in press).
[Publications] K. Okada, M. Yamaji and H. Shizuka: "Laser flash photolysis studies on the induced-quenching process conpeting with hydrogen atom abstraction of triplet benzophenone: Heavy atom effect." Chem. Phys. Letters. (in press).
[Publications] T. Nakayama, A. Otani, and K. Hamanoue: "Effects of water on the phosphorescence spectra of aromatic carbonyl compounds. Part 3. -dual or multiple-component phosphorescence of 1-indanone at 77K in some protic solvents containing water." J. Chem. Soc. Faraday Trans.91. 855-861 (1995)
[Publications] T. Nakayama, N. Nakamura, S. Miki, and K. Hamanoue: "Formation of anthrahydroquinones (XAQH_2) via excited singlet charge-transfer complexes (or singlet ion pairs) of anthraquinones with 2,5-dimethylhexa-2,4-diene(DMHD), and photochemical rection of XAQH2 with DMHD." J. Chem. Soc. Faraday Trans.91. 607-613 (1995)
[Publications] K. Hamanoue, T. Nakayama, I. Tsujimoto, S. Miki, and K. Ushida: "Further Studies on the Nature of the Lowest Excited Triplet State of Haloanthraquinones: Triplet-Triplet Absorption and Phosphorescence Spectra of α-halo (1-bromo, 1-bromo-5-chloro, 1,5-dibromo, 1-bromo-8-chloro and 1,8-dibromo) and β-halo (2-bromo) Conpounds." J. Phys. Chem.99. 5802-5808 (1995)
[Publications] T. Hamana, S. Miki, and K. Hamanoue: "Photoinduced Intra-and Inter-molecular hytrogen-atom abstraction of 1-methylanthraquinone." Chem. Letters. 87-88 (1996)
[Publications] T. Nakayama, T. Hamana, S. Miki, and K. Hamanoue: "Excited-state dynamics of ground-state complexes between haloanthraquinones and 2,5-dimethylhexa-2,4-diene, and quenching of triplet haloanthraquinones by 2,5-dimethylhexa-2,4-diene." J. Phys. Chem.(in press).
[Publications] T. Nakayama, T. Hamana, S. Miki, and K. Hamanoue: "Intramolecular hydrogen-atom transfer at the lowest excited singlet and triplet states resulting in the solvent-dependent novel photochemistry of sterically strained [6]-1,4-cyclophaneanthraquinone." J. Chem. Soc. Faraday Trans.(in press).
[Publications] K. Hamanoue and T. Nakayama: "Photophysics and photochemistry of sterically strained α-haloanthraquinones: The bromo and/or chloro substituted compounds." Res. Chem. Iintermediates. (in press).
[Publications] A. Yoshimura, K. Nozaki, N. Ikeda, and T. Ohno: "Temperature-dependent rates of electron transfer and intersystem crossisng on the laser excitation of ligand-bridged Ru(II) and Co(III) compounds." J. Phys. Chem.100. 1630-1637 (1996)
[Publications] K. Nozaki, N. Ikeda, and T. Ohno: "Reversible intramolecular electron transfer between Ru(II) complexes in the charge-transfer excited states." New J. Chem.(in press).
[Publications] A. Islam. N. Ikeda, and T. Ohno: "Radiationless transition of ruthenium(II) compounds of 2,2'-biquinoline and 2,2': 6',2″-terpyridine in solid." Inorg. Chem.(in press).
[Publications] A. Yoshimura, K. Nozaki, N.Ikeda, and T. Ohno: "Dependence of phosphorescence energy transfer rate on distance between a cationic donor and a cationic acceptor and on temperature." J. Phys. Chem.(in press).
[Publications] A. Yoshimura. K. NOzaki, and T. Ohno: "Inner-sphere reorganization of photoinduced electron transfer on the laserexcitation of ligand-bridged Ru(II)-Rh(III) and Ru(II)-Co(III) compounds." Coord. Chem. Rev.(in press).
[Publications] T. Ueda, R. Fujisawa, H. Fukumura, A. Itaya, and H. Masuhara: "Electronic structure and dynamics of ionic species in thin poly (N-vinylcarbazole) films doped with some electron acceptors as revealed by transient absorption spectroscopy." J. Phys. Chem.99. 3629-3635 (1995)
[Publications] H. Fukumura, E. Takahashi, and H. Masuhara: "Time-resolved spectroscopic and photographic studies of laser ablation of poly (methylmethacrylate) film doped with biphenyl." J. Phys. Chem.99. 750-757 (1995)
[Publications] Y. Tsuboi, H. Fukumura, and H. Masuhara: "UV laser-induced jet formation from liquid surface as revealed by nanosecond time-resolved imaging and spectroscopic studies." J. Phys. Chem.99. 10305-10312 (1995)
[Publications] H. Fujiwara, Y. Nakajima, H. Fukumura and H. Mashuhara: "Laser ablation dynamics of a poly (methyl methacrylate) film doped with 5-diazo meldrum's acid." J. Phys. Chem.99. 11481-11488 (1995)
[Publications] H. Fujiwara, H. Fukumura, and H. Masuhara: "Laser ablation of a pyrene-doped poly (methyl methacrylate) film: dynamics of pyrene transient species by spectroscopic measurements." J. Phys. Chem.99. 11844-11853 (1995)
[Publications] M. Ichikawa, H. Fukumura, and H. Masuhara: "Ultrafast electron-transfer and recombination processes on copper phthalocyanine solid/water interface as revealed by picosecond regular reflection spectroscopy." J. Phys. Chem.99. 12072-12075 (1995)
[Publications] H. Van Mingroot, L. Viaene, M. Van der Auweraer, F. C. De Schryver, M. Ichikawa, H. Fukumura, and H. Masuhara: "A nanosecond transient absorption study of photoinduced heat generation in microcrystals of c-metal free phthalocyanine dispersed in polymer films." J. Phys. Chem.99. 17174-17178 (1995)
[Publications] M. Rucker, P. Vanoppen, F. C. de Schryver, J. J. Ter Horst, J. Hotta, and H. Masuhara: "Fluorescence mapping and photobleaching of dye-labeled latex particles dispersed in PVA matrices wht a near-field optical microscope." Macromolecules. 28. 7530-7535 (1995)
[Publications] Y. Tsuboi, S. Sakashita, K. Hatanaka, H. Fukumura, and H. Masuhara: "Photothermal ablation of polystyrene film by 248nm excimer laser irradiation: A mechanistic study by time-resolved measurements." Laser Chem.(in press). (1995)
[Publications] H. Fukumura, Y. Kohji, and H. Masuhara: "Laser implanation of fluorescent molecules into polymer films." Applied Surface Science. (in press).
[Publications] H. Sakai, A. Itaya, H. Masuhara, K. Sasaki, and S. Kawata: "Fluorescence dynamics of poly (N-vinylcarbazole) in solution as revealed by multicomponent analysis of picosecond time-resolved fluorescence spectra: dependence on tacticity and molecular weight." Polymer.37. 31-43 (1996)
[Publications] K. Sakai, Z. -Y. Shi, R. Kopelman, and H. Masuhara: "Three-dimensional pH microprobing with an optically-manipulated fluorescence particle." Chem. Letters. 141-142 (1996)
[Publications] H. Furutani, H. Fukumura, and H. Masuhara: "Photothermal transient expansion and contraction dynamics of polymer films by nanosecond interferometry" J. Phys. Chem.in press
[Publications] L. S., Bennett, T. Lippert, H. Furutani, H. Fukumura, and H. Masuhara: "Laser-induced microexplosions of a photosensitive polymer." Appl.Phys. A. (in press).
[Publications] S. Shibata, Y. Yamane, K. Kamada, K. Ohta, K. Sasaki, and H. Masuhara: "Laser-emission from dye-doped organic-inorganic particle of microcavity structure" J. Sol-Gel. Sci. Tech.(in press).
[Publications] A. Onkelinx, F. C. De Schryver, L. Viaene, M. Van der Auweraer, K. Iwai, M. Yamamoto, M. Ichikawa, H. Masuhara, H. Maus, and W. Rettig: "Radiative depopulation of the excited intramolecular charge transfer state of 9- (4-N. N-dimethylaminopheny) phenanthrene." J. Am. Chem. Soc.(in press).
[Publications] J. Hofkens, J. Hotta, K. Sasaki, H. Masuhara, H. Faes, and F. C. De Schryver: "Laser-induced phase transient in aqueous solutions of hydrophobically modified poly (N-isopropylacrylamide)." Mol. Crys. Liq. Crys.(in press).
[Publications] Y. Koyama: "Resonance Raman spectroscopy." Carotenoids. 1B. 135-146 (1995)
[Publications] L. Limantara, Y. Kurimoto, K. Furukawa, T. Shimamura, H. Utsumi, I. Katheder, H. Scheer, and Y. Koyama: "The environments of the four nitrogen atoms of bacteriochlorophyll a in solutions as revealed by ^<15>N-NMR spectroscopy." Chem. Phys. Letters. 236. 71-77 (1995)
[Publications] G. E. Bialek-Bylka, T. Tomo, K. Satoh, and Y. Koyama: "15-cis-β-Carotene found in the reaction center of spinach photosystem II." FEBS Letters. 363. 137-140 (1995)
[Publications] Y. Misono, E. Nishizawa, L. Limantara, Y. Koyama, and K. Itoh: "Solvent effects on the resonance Raman spectra of bacteriochlorophyll a cation radical." Chem. Phys. Letters. 236. 413-418 (1995)
[Publications] Y. Mukai, M. Abe, Y. Katsuta, S. Tomozoe, M. Ito, and Y. Koyama: "Structure of all-trans-retinal in the T _1 state as determined by Raman spectroscopy: A set of carbon-carbon and carbon-oxygen stretching force constants determined by the normal coordinate analysis of the T _1 Raman lines of the undeuterated and variously deuterated retinals." J. Phys. Chem.99. 7160-7171 (1995)
[Publications] Y. Koyama, Y. S. Jiang, and Y. Watanabe: "Fluorescence spectroscopy of 13'-cis-spheroidene at 170K: A reason for the natural selection of the all-trans configuration for the light-harvesting function." Biospectroscopy. 1. 125-132 (1995)
[Publications] H. Nakagawa, T. Okada, and Y. Koyama: "Role of animo-acid sidechains in electron-transfer reactions in reaction center of rhodopsedomonas viridis as revealed by extended Huckel molecular orbital calculations." Biospectroscopy. 1. 169-185 (1995)
[Publications] M. Kuki, M. Naruse, T.Kakuno, and Y. Koyama: "Resonance Raman evidence for 15-cis to all-trans photoisomerization of spirilloxanthin bound to a reduced form of the reaction center of rhodospirillum rubrum S1." Photochem. Photobiol.62. 502-508 (1995)
[Publications] H. Nakagawa, Y. Koyama, T. Kawai, and T. Okada: "A new clustering for protein sequences and its application to constraints discovery in protein evolution." Int. J. Peptide Protein Res.46. 440-451 (1995)
[Publications] Y. Hu, T. Mizoguchi, Y. Kurimoto, and Y. Koyama: "Isolation by high-pressure liquid chromatography of cis-trans isomers of β-apo-12'-carotenal and determination of their configurations by ^1H-NMR spectroscopy." Spectrochimica Acta: A. 51. 1949-1958 (1995)
[Publications] Y. Koyama, L. Limantara, E. Nishizawa, Y. Misono, and K. Itoh: "Presence of penta-and hexa-coordinated states in T_1 and cation-radical bacteriochlorophyll a, and generation of cation radical by photo-excitation of the aggregated forms as revealed by transient Raman and transient absorption spectroscopy." Time-Resolved Bibrational Spectroscopy VII. (in press).
[Publications] Y. Mishono, L. Limantara, Y. Koyama, and K. Itoh: "Solvent effects on the resonance Raman and electronic absorption spectra of bacteriochlorophyll a cation radical." J. Phys. Chem.(in press).
[Publications] Y. S. Jiang, Y. Kurimoto, T. Shimamura, N. Ko-chi, Y. Mukai, and Y. Koyama: "Isolation by higy-pressure liquid chromatography, configurational determination by ^1H-NMR, and analyses of electronic sbsorption and Raman spectra of isomeric spheroidene." Biospectroscopy. (in press).
[Publications] N. Ohashi, N. Ko-chi, M. Kuki, T. Shimamura, R. J. Cogdell, and Y. Koyama: "The sturctures of S_0 spheroidene in the light-harvesting (LH2) complex and S_0 and T_1 spheroidene in the light-harvesting (LH2) complex and S_0 and T_1 spheroidene in the reaction center of rhodobacter sphaeroides 2.4.1 as revealed by Raman spectroscopy." Biospectroscopy. (in press).
[Publications] Y. Koyama, M. Kuki, P. O. Anderson, and T. Gillbro: "Singlet excited states and the light harvesting function of carotenoids in bacterial photosynthesis." Photochem. Photobiol.(in press).
[Publications] T. Mizoguchi, L. Limantara, K. Matsuura, K. Shimada, and Y. Koyama: "Aggregation forms of 8-ethyl-12-ethyl farnesyl bacteriochlorophyll c in methanol-chloroform mixtures as revealed by ^1H-NMR spectroscopy." J. Mol. Struct.(in press).

1995 Fiscal Year Annual Research Report

凝縮相における光反応ダイナミックス

Principal Investigator

閑 春夫 群馬大学, 工学部, 教授 (40008454)

Research Products

[Publications] T. Arai, S. Tobita, and H. Shizuka: "Tunnelling effects on the 1,3-and 1,5-sigmatropic hydrogen shifts in the ground state of photo-Fries rearranged intermediates of phenyl acetate studied by laser flash photolysis." J. Am. Chem. Soc.,. 117. 3968-3975 (1995)

[Publications] M. Yamaji, T. Kiyota, S. Kimura, and H. Shizuka: "Laser flash photolysis studies on the interaction between triplet benzophenone and naphtholate anions. Electron transfer or triplet energy transfer?" Chem. Pphys. Letters. 237. 419-424 (1995)

[Publications] I. Amada, M. Yamaji, M. Sase, and H. Shizuka: "Laser flash photolysis studies on hydrogen atom abstraction from phenol by triplet naphthoquinones in acetonitrile." J. Chem. Soc. Faraday Trans.91. 2751-2759 (1995)

[Publications] S. Tobita, J. Ohba, K. Nakagawa, and H. Shizuka: "Recovery mechanisms of the reaction intermediate produced by photo-induced cleavage of the intramolecular hydrogen bond of dibenzoylmethane." J. Photochem. Photobiol. A. Chem.92. 61-67 (1995)

[Publications] Y. Nakamura, T. Minowa, S. Tobita H. Shizuka, and J. Nishimura: "Synthesis and electronic properties of C_<60>-o-quinodimethane adducts." J. Chem. Soc. Perkin Trans. 2. 2351-2357 (1995)

[Publications] T. Kiyota, M. Yamaji, and H. Shizuka: "Hydrogen-bonding induced electron transfer from triplet N, N-dialkyl-1-naphthylamines to benzophenone via triplet exciplexes." J. Phys. Chem.100. 672-679 (1996)

[Publications] I. Amada, M. Yamaji, S. Tsunoda, and H. Shizuka: "Laser photolysis studies on electron transfer between triplet naphthoquinones and amines" J. Photochem. Photobiol. A. Chem.(in press).

[Publications] Y. Nakamura, T. Minowa, Y. Hayashida, S. Tobita, H. Shizuka, and J. Nishimura: "Relaxation processes in the excited state of C_<60>-o-quinodimethane adducts." J. Chem. Soc. Faraday Trans.(in press).

[Publications] Y. Nakamura, T. suihiji, T. Mita, T. Minowa, S. Tobita, H. Shizuka, and J. Nishimura: "Synthesis, structure, and electronic structure of syn-[2.2] phenanthrenophanes: First observation of their excimer fluorescence at high temperature." J. Am. Chem. Soc.(in press).

[Publications] A. K. Mishra and H. Shizuka: "Temperature effects on dual emission from ion pairs produced by excited-state proton transfer in the 1-naphthol-triethylamine system." J. Chem. Soc. Faraday Trans.(in press).

[Publications] F. Saito, S. Tobita, and H. Shizuka: "Photophysical and photochemical processes of aniline in cyclohexane and aqueous solution." J. Phys. Chem.(in press).

[Publications] K. Okada, M. Yamaji and H. Shizuka: "Laser flash photolysis studies on the induced-quenching process conpeting with hydrogen atom abstraction of triplet benzophenone: Heavy atom effect." Chem. Phys. Letters. (in press).

[Publications] T. Nakayama, A. Otani, and K. Hamanoue: "Effects of water on the phosphorescence spectra of aromatic carbonyl compounds. Part 3. -dual or multiple-component phosphorescence of 1-indanone at 77K in some protic solvents containing water." J. Chem. Soc. Faraday Trans.91. 855-861 (1995)

[Publications] T. Hamana, S. Miki, and K. Hamanoue: "Photoinduced Intra-and Inter-molecular hytrogen-atom abstraction of 1-methylanthraquinone." Chem. Letters. 87-88 (1996)

[Publications] T. Nakayama, T. Hamana, S. Miki, and K. Hamanoue: "Excited-state dynamics of ground-state complexes between haloanthraquinones and 2,5-dimethylhexa-2,4-diene, and quenching of triplet haloanthraquinones by 2,5-dimethylhexa-2,4-diene." J. Phys. Chem.(in press).

[Publications] K. Hamanoue and T. Nakayama: "Photophysics and photochemistry of sterically strained α-haloanthraquinones: The bromo and/or chloro substituted compounds." Res. Chem. Iintermediates. (in press).

[Publications] A. Yoshimura, K. Nozaki, N. Ikeda, and T. Ohno: "Temperature-dependent rates of electron transfer and intersystem crossisng on the laser excitation of ligand-bridged Ru(II) and Co(III) compounds." J. Phys. Chem.100. 1630-1637 (1996)

[Publications] K. Nozaki, N. Ikeda, and T. Ohno: "Reversible intramolecular electron transfer between Ru(II) complexes in the charge-transfer excited states." New J. Chem.(in press).

[Publications] A. Islam. N. Ikeda, and T. Ohno: "Radiationless transition of ruthenium(II) compounds of 2,2'-biquinoline and 2,2': 6',2″-terpyridine in solid." Inorg. Chem.(in press).

[Publications] A. Yoshimura, K. Nozaki, N.Ikeda, and T. Ohno: "Dependence of phosphorescence energy transfer rate on distance between a cationic donor and a cationic acceptor and on temperature." J. Phys. Chem.(in press).

[Publications] A. Yoshimura. K. NOzaki, and T. Ohno: "Inner-sphere reorganization of photoinduced electron transfer on the laserexcitation of ligand-bridged Ru(II)-Rh(III) and Ru(II)-Co(III) compounds." Coord. Chem. Rev.(in press).

[Publications] T. Ueda, R. Fujisawa, H. Fukumura, A. Itaya, and H. Masuhara: "Electronic structure and dynamics of ionic species in thin poly (N-vinylcarbazole) films doped with some electron acceptors as revealed by transient absorption spectroscopy." J. Phys. Chem.99. 3629-3635 (1995)

[Publications] H. Fukumura, E. Takahashi, and H. Masuhara: "Time-resolved spectroscopic and photographic studies of laser ablation of poly (methylmethacrylate) film doped with biphenyl." J. Phys. Chem.99. 750-757 (1995)

[Publications] Y. Tsuboi, H. Fukumura, and H. Masuhara: "UV laser-induced jet formation from liquid surface as revealed by nanosecond time-resolved imaging and spectroscopic studies." J. Phys. Chem.99. 10305-10312 (1995)

[Publications] H. Fujiwara, Y. Nakajima, H. Fukumura and H. Mashuhara: "Laser ablation dynamics of a poly (methyl methacrylate) film doped with 5-diazo meldrum's acid." J. Phys. Chem.99. 11481-11488 (1995)

[Publications] H. Fujiwara, H. Fukumura, and H. Masuhara: "Laser ablation of a pyrene-doped poly (methyl methacrylate) film: dynamics of pyrene transient species by spectroscopic measurements." J. Phys. Chem.99. 11844-11853 (1995)

[Publications] M. Ichikawa, H. Fukumura, and H. Masuhara: "Ultrafast electron-transfer and recombination processes on copper phthalocyanine solid/water interface as revealed by picosecond regular reflection spectroscopy." J. Phys. Chem.99. 12072-12075 (1995)

[Publications] M. Rucker, P. Vanoppen, F. C. de Schryver, J. J. Ter Horst, J. Hotta, and H. Masuhara: "Fluorescence mapping and photobleaching of dye-labeled latex particles dispersed in PVA matrices wht a near-field optical microscope." Macromolecules. 28. 7530-7535 (1995)

[Publications] Y. Tsuboi, S. Sakashita, K. Hatanaka, H. Fukumura, and H. Masuhara: "Photothermal ablation of polystyrene film by 248nm excimer laser irradiation: A mechanistic study by time-resolved measurements." Laser Chem.(in press). (1995)

[Publications] H. Fukumura, Y. Kohji, and H. Masuhara: "Laser implanation of fluorescent molecules into polymer films." Applied Surface Science. (in press).

[Publications] H. Sakai, A. Itaya, H. Masuhara, K. Sasaki, and S. Kawata: "Fluorescence dynamics of poly (N-vinylcarbazole) in solution as revealed by multicomponent analysis of picosecond time-resolved fluorescence spectra: dependence on tacticity and molecular weight." Polymer.37. 31-43 (1996)

[Publications] K. Sakai, Z. -Y. Shi, R. Kopelman, and H. Masuhara: "Three-dimensional pH microprobing with an optically-manipulated fluorescence particle." Chem. Letters. 141-142 (1996)

[Publications] H. Furutani, H. Fukumura, and H. Masuhara: "Photothermal transient expansion and contraction dynamics of polymer films by nanosecond interferometry" J. Phys. Chem.in press

[Publications] L. S., Bennett, T. Lippert, H. Furutani, H. Fukumura, and H. Masuhara: "Laser-induced microexplosions of a photosensitive polymer." Appl.Phys. A. (in press).

[Publications] S. Shibata, Y. Yamane, K. Kamada, K. Ohta, K. Sasaki, and H. Masuhara: "Laser-emission from dye-doped organic-inorganic particle of microcavity structure" J. Sol-Gel. Sci. Tech.(in press).

[Publications] J. Hofkens, J. Hotta, K. Sasaki, H. Masuhara, H. Faes, and F. C. De Schryver: "Laser-induced phase transient in aqueous solutions of hydrophobically modified poly (N-isopropylacrylamide)." Mol. Crys. Liq. Crys.(in press).

[Publications] Y. Koyama: "Resonance Raman spectroscopy." Carotenoids. 1B. 135-146 (1995)

[Publications] L. Limantara, Y. Kurimoto, K. Furukawa, T. Shimamura, H. Utsumi, I. Katheder, H. Scheer, and Y. Koyama: "The environments of the four nitrogen atoms of bacteriochlorophyll a in solutions as revealed by ^<15>N-NMR spectroscopy." Chem. Phys. Letters. 236. 71-77 (1995)

[Publications] G. E. Bialek-Bylka, T. Tomo, K. Satoh, and Y. Koyama: "15-cis-β-Carotene found in the reaction center of spinach photosystem II." FEBS Letters. 363. 137-140 (1995)

[Publications] Y. Misono, E. Nishizawa, L. Limantara, Y. Koyama, and K. Itoh: "Solvent effects on the resonance Raman spectra of bacteriochlorophyll a cation radical." Chem. Phys. Letters. 236. 413-418 (1995)

[Publications] Y. Koyama, Y. S. Jiang, and Y. Watanabe: "Fluorescence spectroscopy of 13'-cis-spheroidene at 170K: A reason for the natural selection of the all-trans configuration for the light-harvesting function." Biospectroscopy. 1. 125-132 (1995)

[Publications] H. Nakagawa, T. Okada, and Y. Koyama: "Role of animo-acid sidechains in electron-transfer reactions in reaction center of rhodopsedomonas viridis as revealed by extended Huckel molecular orbital calculations." Biospectroscopy. 1. 169-185 (1995)

[Publications] M. Kuki, M. Naruse, T.Kakuno, and Y. Koyama: "Resonance Raman evidence for 15-cis to all-trans photoisomerization of spirilloxanthin bound to a reduced form of the reaction center of rhodospirillum rubrum S1." Photochem. Photobiol.62. 502-508 (1995)

[Publications] H. Nakagawa, Y. Koyama, T. Kawai, and T. Okada: "A new clustering for protein sequences and its application to constraints discovery in protein evolution." Int. J. Peptide Protein Res.46. 440-451 (1995)

[Publications] Y. Hu, T. Mizoguchi, Y. Kurimoto, and Y. Koyama: "Isolation by high-pressure liquid chromatography of cis-trans isomers of β-apo-12'-carotenal and determination of their configurations by ^1H-NMR spectroscopy." Spectrochimica Acta: A. 51. 1949-1958 (1995)

[Publications] Y. Mishono, L. Limantara, Y. Koyama, and K. Itoh: "Solvent effects on the resonance Raman and electronic absorption spectra of bacteriochlorophyll a cation radical." J. Phys. Chem.(in press).

[Publications] Y. S. Jiang, Y. Kurimoto, T. Shimamura, N. Ko-chi, Y. Mukai, and Y. Koyama: "Isolation by higy-pressure liquid chromatography, configurational determination by ^1H-NMR, and analyses of electronic sbsorption and Raman spectra of isomeric spheroidene." Biospectroscopy. (in press).

[Publications] Y. Koyama, M. Kuki, P. O. Anderson, and T. Gillbro: "Singlet excited states and the light harvesting function of carotenoids in bacterial photosynthesis." Photochem. Photobiol.(in press).

[Publications] T. Mizoguchi, L. Limantara, K. Matsuura, K. Shimada, and Y. Koyama: "Aggregation forms of 8-ethyl-12-ethyl farnesyl bacteriochlorophyll c in methanol-chloroform mixtures as revealed by ^1H-NMR spectroscopy." J. Mol. Struct.(in press).

閑春夫群馬大学, 工学部, 教授 (40008454)