Time-resolved resonance Raman spectroscopic investigations of the photochemistry of ubiquinone

Parker, Anthony W and Hester, Ronald E and Phillips, David and Umapathy, Siva (1992) Time-resolved resonance Raman spectroscopic investigations of the photochemistry of ubiquinone. In: Faraday Transactions, 88 (18). pp. 2649-2653.

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Abstract

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.

Item Type:	Journal Article
Publication:	Faraday Transactions
Publisher:	Royal Society of Chemistry
Additional Information:	Copyright of this article belongs to Royal Society of Chemistry.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	30 May 2011 05:16
Last Modified:	30 May 2011 05:16
URI:	http://eprints.iisc.ac.in/id/eprint/37846

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