Abstract
ABSTRACT A comparison between photoelectron transfer in oil in water and water in oil micelles and microemulsions containing both anionic and cationic surfactants, as well as in an aqueous nonionic micellar solution, is presented in this paper. With zinc tetra-methylpyridylporphyrin and various mono and dialkyviologens, the forward electron transfer occurs from the triplet state. The delay in the back electron transfer is due, in oil in water micelles and microemulsions, to increase in the hydrophobic character of reduced viologen. Similar results are obtained using cetyltrimethylammonium methacrylate micelles and polymerized assemblies. In water in oil microemulsions, no delay In the back reaction is obtained using cetyltrimethylammonium methacrylate micelles and polymerized assemblies. In water in oil microemulsions, no delay in the back reaction is obtained for porphyrin and viologens both located in the water pool.
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