Photoreduction of methylviologen catalyzed by phthalocyanine complexes of yttrium(III) and lanthanoid(III) metals

摘要: The preparation of phthalocyanine complexes yttrium, samarium, gadolinium, ytterbium, and lutetium is reported. PcLnAcO complex (Pc = dianion AcO acetate anion) was found to act as the sensitizer for photoreduction methylviologen chloride (MVCl{sub 2}) in a methanol solution upon irradiation with visible light. On basis data from spectrophotometric studies laser flash-photolysis studies, observation made that metalophthalocyanine proceeds via an oxidative process, reaction scheme proposed. 15 refs., 2 figs.