| Project/Area Number |
05453121
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
工業物理化学
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| Research Institution | Osaka University |
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Principal Investigator |
TAKAMUKU Setsuo Osaka University, The Institute of Scientific and Industrial Research (ISIR), Professor, 産業科学研究所, 教授 (50029849)
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| Co-Investigator(Kenkyū-buntansha) |
SAJI Sachiko Osaka Univ., ISIR,Res.Tech, 産業科学研究所, 教務職員 (50197844)
ISHIDA Akito Osaka Univ., ISIR,Res.Assist, 産業科学研究所, 助手 (20184525)
OKAMOTO Yoshiki Osaka Univ., ISIR,Res.Assist, 産業科学研究所, 助手 (40029864)
MJIMA Tetsurou Osaka University, ISIR,Assoc.Prof., 産業科学研究所, 助教授 (00165698)
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| Project Period (FY) |
1993 – 1994
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| Keywords | Radiation Chemistry / Photochemistry / Laser Photolysis / Pulse Radiolysis / Reaction Intermediate / Transient Species |
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| Research Abstract |
By using pulse radiolysis and flash photolysis combined metods novel and highly efficient chemical reactions have been studied as described below ;
(1) Photochemical reactions of aromatic radical cations. Unimolecular cis-trans isomerizations have been observed upon the photoirradiation of stilbene and diphenyl-1,3-butadiene radical cations. The lifetimes of the photoexcited states of aromatic radical cations have been estimated by the addition of hole transfer quencher such as anisole to be subnanosecond order. The correlation between the lifetimes and unimolecular reactivities of aromatic radical cations in the excited state was also observed.
(2) Chemical reactivities of active species with a C=N group. Upon one-electron oxidation and reduction of nitrile ylid produced by photoirradiation novel active species was produced and the reactivity was investigated. Efficient reaction of biphenylyl ilid with carbon dioxide was found.
(3) Chemical reactivity of organophosphorous compounds in the exicited state. Photochemical reactions of bis- or tris-aryl phosphate and phopsphonate resulted in intramolecular biaryl formation and aryl migration via excimer and monomer excited state, reapectively.
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