Publication costs assisted by Kyoto UniversityAqueous and alcoholic solutions of silver perchlorate have been photolyzed by 253.7-nm light. The primary reaction of the photolysis is assumed to be electron transfer from solvent molecule to silver ion: (Ag+, ROH)cage + hv -* (Ag, ROH+)cage. Variations of the mean quantum yield of silver atom formation with the concentrations of silver ion, hydrogen ion, and alcohols added are systematically interpreted by the concept that reactive species are surrounded by the solvent cage. It is proposed that the number of solvent molecules composing a cage would be about 10. The quantum yield increases with reaction temperature. Apparent activation energies of the quantum yields are about 2-6 kcal/mol.
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