COMPLEXATION OF ZINC TETRAPHENYLPORPHYRINTRISULFONATE BY VIOLOGEN AND ITS ROLE IN PHOTOREDOX PROCESSES.

Abstract

The formation of the cation radicals of viologen dyes was established when an aqueous solution containing zinc tetraphenylporphyrintrisulfonate (Zn-TPPS//3), viologen dye, and 2-mercaptoethanol was irradiated by visible light. On the basis of the rate expression, a reaction mechanism containing the complexation of Zn-TPPS//3 by viologen was proposed. On the addition of hydrogenase to the above photo-irradiation system, hydrogen evolution was observed by the irradiation of visible light.