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Picosecond study of an electron transfer in the first excited state of dodci

✍ Scribed by J.C. Mialocq; D. Doizi; M.P. Gingold

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
508 KB
Volume
103
Category
Article
ISSN
0009-2614

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✦ Synopsis

Electron transfer from the first excited singlet state of a polyrnethine cyanine dye, DODCI, to various electron acceptors @-benzoquinone, pdinitrobenzene and methylviologen) was investigated using picosecond fluorescence and absorption spectroscopy. The electron transfer to methylviologen was confirmed by conventional nanosecond laser spectroscopy. Its cfticiency, as expressed by the ratio X-s/(X-, + ks) = 0.07. can be explained by coulombic repulsion in the initial rzdlcal pair. On the other hand, although fluorescence quenching by p-BQ and p-DNB is very efficient, no electron transfer 1~~s observed.

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