Journal of the Chemical Society - Faraday Transactions p. 2649 - 2654 (1992)
Update date:2022-08-03
Topics:
Parker, Anthony W.
Hester, Ronald E.
Phillips, David
Umapathy, Siva
Time-resolved resonance Raman spectroscopy has been used to investigate the photochemistry of ubiquinone in cyclohexane, water and ethanol.In water the absorption of a single 248 nm photon produces triplet ubiquinone which then oxidises water, via electron transfer, to form the ubiquinone radical anion.In ethanol, however, the triplet state reacts with the solvent via both electron and hydrogen-atom transfer, the latter process forming the semihydroquinone.Only in the less reactive solvent, cyclohexane, is triplet quinone observed.The Raman bands observed for each of the species are assigned on the basis of similarities of their spectra to other quinones.
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