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Author Nakagawa, Kouichi ♦ Katsuki, Akio ♦ Tero-Kubota, Shozo ♦ Tsuchihashi, Nobuaki ♦ Fujita, Teizo
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CHEMISTRY ♦ PHYSICS ♦ ENGINEERING NOT INCLUDED IN OTHER CATEGORIES ♦ SOLVATED ELECTRONS ♦ ELECTRON SPIN RESONANCE ♦ KINETICS ♦ ORGANIC SULFUR COMPOUNDS ♦ ELECTRON SPECTRA ♦ HYDRATION ♦ LASER RADIATION ♦ PHOTOCHEMICAL REACTIONS ♦ RADICALS ♦ COBALT COMPLEXES ♦ QUINONES
Abstract We have studied nanosecond kinetics of the hydrated electron (e{sup -}{sub aq}) generated by laser excitation of phenothiazine (PTH) in the presence of quinone in SDS solution using FT EPR. Using two different quinones, idebenone (IDB) and CoQ{sub 0}, we have observed the unique photochemical processes due to the micellar effect in the system. The analyses of FT EPR results suggested that IDB with the long alkyl alcohol chain at the 6-position became the corresponding anion radical by quenching of e{sup -}{sub aq}. On the other hand, CoQ{sub 0}, without the long chain, was reduced by two processes, quenching of e{sup -}{sub aq} and direct electron transfer from the triplet precursor. Moreover, the distinctive dispersive pattern, which implied the radical pair of [PTH{sup .+}...e{sup -}{sub aq}], was observed at 30 ns after the excitation of PTH in IDB/SDS micellar system but was not observed for CoQ{sub 0}. 20 refs., 7 figs.
ISSN 00027863
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-06-19
Publisher Place United States
Journal Journal of the American Chemical Society
Volume Number 118
Issue Number 24


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