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Indexed by:期刊论文

Date of Publication:2007-05-20

Journal:JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY

Included Journals:SCIE、Scopus

Volume:188

Issue:2-3

Page Number:317-324

ISSN No.:1010-6030

Key Words:ruthenium polypyridyl complexes; tyrosine; electron transfer; electron donors photosensitizer; photosynthesis

Abstract:The complexes [cis-(RuL)-L-II'(2)(SCN)(2) and cis-(RuLL)-L-II'(SCN)(2)] (L = 4,4'-bis(ethoxycarbonyl)-2,2'-bipyridine, L'=2,2'-bpy-4,4'-CONH-L-tyrosine ethyl ester) are prepared and characterized. Two or four tyrosine ethyl ester groups are covalently linked to a ruthenium polypyridyl photosensitizer as electron donor. Upon light excitation, intermolecular electron transfer from the excited ruthenium(II) to MV2+ occurs, followed by intramolecular electron transfer from tyrosine moieties to Ru(III) with a rate constant of k(f) > 1 x 10(8)s(-1) (tau(f) < 10 ns). (C) 2006 Elsevier B.V. All rights reserved.