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LIGHT‐DRIVEN REDOX PROCESSES IN FUNCTIONAL MICELLAR UNITS—III. Zn‐TETRAPHENYLPORPHYRIN SENSITIZED REACTIONS IN METHYL VIOLOGENE SURFACTANT ASSEMBLIES
Author(s) -
Pileni MariePaule,
Braun A. M.,
Grätzel M.
Publication year - 1980
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/j.1751-1097.1980.tb03723.x
Subject(s) - redox , chemistry , micelle , electron transfer , photochemistry , tetraphenylporphyrin , excited state , kinetics , pulmonary surfactant , catalysis , inorganic chemistry , aqueous solution , organic chemistry , porphyrin , biochemistry , physics , quantum mechanics , nuclear physics
— The photoreduction of methyl viologene by ZnTPP triplet excited states was studied in mixed micelles containing the functional surfactant JV‐dodecyl, N ‐methyl viologene (C 12 MV 2+ ) as one and Cetyltrimethylammoniumchloride (CTAC) as the other component. Using the laser photolysis technique the kinetics of the redox reaction were studied at various CTAC/C 12 MV 2+ ratios. The average time for the electron transfer decreases linearly with the C 12 MV 2+ occupancy. The back transfer from C 12 MV 2+ to ZnTPP 2+ can be intercepted if a donor such as NADH is cosolubilized in the micelle. In such a system irreversible methyl viologene reduction is achieved which in the presence of a suitable redox catalyst can be used to produce hydrogen from water.