✦ LIBER ✦

Micellar effects on charge separation

✍ Scribed by B. Lerebours; Y. Chevalier; M.P. Pileni

Publisher: Elsevier Science
Year: 1985
Tongue: English
Weight: 508 KB
Volume: 117
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(85)80411-5

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✦ Synopsis

Photoclcctron transfer from a zmc tebamethylpyxidylporphyrin to mono-and diallcylvlologens has been studied in aqueous and in cetylkimethylammomum chloride micellax solutions. For viologens having side chaurs with more than twelve (for monoalkylviologens) or eight (for diaJkylviologens) carbon atoms, the back reaction between porphyrin cation and reduced viologen, formed in the bulk aqueous phase from the zinc porphyrin triplet state, is strongly retarded. From Idneuc studies and NMR experiments, the strong delay of the back reaction is attributed to trapping of reduced viologen in the micelIz core.

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