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Quenching of the ZnTPP excited states by para-cyano-N- methylpyridine

โœ Scribed by Zeinab M.A. Abou-Gamra; Nabila M. Guindy

Book ID
103991725
Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
530 KB
Volume
46
Category
Article
ISSN
1010-6030

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โœฆ Synopsis

Electron transfer quenching of excited states can lead to separated redox products for which back electron transfer can be highly favoured. Fluorescence quantum yield measurements and flash photolysis showed that there are no intermolecular and intramolecular interactions between singlet excited ZnTPP and p-cyano-N-methylpyridine in DMSO. Redox-ion product (ZnTPPf) was produced by flash photolysis using para-cyano-N-methylpyridine as quencher, and a quenching rate constant of 3.6 X lo6 M-i S-l was obtained for the triplet state of ZnTPP in Triton X-100 micelle aqueous solution.

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