Photoinduced electron transfer from polystyrene pendant tris(2,2′‐bipyridyl)ruthenium (II) complex to methylviologen

The characteristics of the photoinduced electron transfer reaction from polystyrene pendant tris(2,2′‐bipyridyl)ruthenium (II) complex [Ru(bpy) ] to methylviologen (MV2+) were studied. The rate constant k1 from the excited state of the complex, Ru(bpy) , to MV2+ were determined for both the polymeric and monomeric complexes from the lifetime τ of Ru(bpy) and the quenching rate of Ru(bpy) by MV2+. The polymer pendant Ru(bpy) showed three kinds of τ components ranging from 7 to 474 ns, in contrast to the monomeric complex, which showed one component of 350 ns. The k1 values for both complexes were almost the same, on the order of 108 L/mol s. The photoinduced electron transfer from solid‐phase Ru(bpy) to liquid‐phase MV2+ was realized by utilizing the polymer complex, and the solid–liquid interphase reaction system is discussed.