Electrochemical and in-situ spectroelectrochemical behaviors of nonperipherally tetra substituted zinc(II) and magnesium(II) phthalocyanines

Abstract

The electrochemical behaviors of non-peripherally tetra substituted zinc(II) andmagnesium(II) phthalocyanines were studied at glassy carbon electrode in N,N-dimethylformamideusing cyclic and square wave voltammetry techniques. Electrochemical mechanisms of complexes wereilluminated by using the relationship between scan rate and peak current. The complexes exhibitedreversible and diffusion controlled behaviors. The effect of metal center on redox properties ofcomplexes were investigated and compared. Zinc and magnesium phthalocyanines showed threereduction redox pairs and one oxidation redox pair, which are similar with small differences in potentialduring electrochemical measurements. Electrochemical results were supported with in-situspectroelectrochemical measurements. Moreover, the color changes were recorded and sharp colortransitions were observed during the reduction and oxidation redox processes.