Electron-relay chain reaction of N-methyl-4-β-styrylpyridinium ion on colloidal silica

Abstract

The effect of colloidal silica on the [Ru(bpy)₃]²⁺-sensitized photochemical cis-trans isomerization of N-methyl-4-β-styrylpyridinium (cis-MSP⁺) ion induced by one-electron transfer has been studied. An efficient electron-relay chain reaction has been shown to take place on the colloidal surface, on the basis of remarkably high quantum yields compared with those in the absence of colloids. The adsorption of cis-MSP⁺ on the surface of the colloidal particles is discussed.