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An investigation of the triplet state dynamics of zinc chlorophyll b by microwave-induced changes in the intensity of fluorescence and singlet-singlet absorption

โœ Scribed by Richard H. Clarke; Robert E. Connors

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
426 KB
Volume
33
Category
Article
ISSN
0009-2614

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โœฆ Synopsis

Opticd detection of magnetic resonance expeiknenk on tie trip!et Stare Of zinc-substituted cillorophyll b has provided the zero-field splitting ad depopulation rate consi2nll:s for the individual triplet s-pin sublevels. The zcio field triplet s'tite EPR traxitions cau!d be observed at 890 hiFLz ad 1065 MH-L 2s either microwave-indeced chx~~es in the fluorescence intensity or in the intensity of So + S, absorption. Tne dynnrnics espcriments shov; that intersystem crossing from the Zn chloropbyl! b triplet stat? into the gound state occurs primarily thxou& thz out-of+ne (lowest energy) sgin subleve!. * Supported by the U.S. Amy Res e2rc.h QMce (DurhzG), L&e Res&rc!~ Corporation , and the Petrolewm Resezich Fund, edmititered by the Anerian Cii'nerniti Society. ** AXred P. S!ozn Resezxh Fellow.

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