CYCLIC VOLTAMMETRY AND PHOTOOXIDATION OF MOLYBDENUM(V) PHTHALOCYANINE

Cyclic voltammetry of OMoV(OH)Pc in chlotronaphthalene shows two quasi reversible oxidation couples at 0.38 and 1.22 V and three quasi-revers ible reduction couples at - 0.74, - 1.15 and - 1.85 V vs S.C.E. Bulk e lectrolysis of OMoV(OH)Pc(pC(2-) = phthalocyanine dianion) shows that the first oxidation couple is due to the oxidation of the central Mo-V metal to Mo-VI and the first reduction couple due to reduction to OMo (IV)Pc. Cyclic voltammetry and spectroelectrochemistry in DMSO also sh owed redox activity at the metal. Further reductions or oxidations in OMo(V)Pc complexes occur at the phthalocyanine ring. OMoV(OH)Pc is rea dily photooxidized at the metal in the presence dichloromethane or dic hlorobenzene, with the formation of OMo(VI)Pc species.