Effect of Transition Metal(￥±)-N,N-Bis(salicylaldehyde)phenylenediimines on the Electrochemical Reduction of Thionyl Chloride

摘要

Catalytic effects of transition metal (Co2+, Ni2+) complexes of N,N-bis(salicylaldehyde)-o-phenylenediimine (SOPD), N,N-bis(salicylaldehyde)-m-phenylenediimine (SMPD), and N,N-bis(salicylaldehyde)-p-phenylenediimine (SPPD), on the reduction of thionyl chloride at glassy carbon electrode, are evaluated by determining the kinetic parameters with cyclic voltammetric technique. The charge transfer process for the reduction of thionyl chloride is strongly affected by the concentration of the catalysts. Some quadridentate Schiff base-M(ケ) complexes show sizable catalytic activities for the reduction of thionyl chloride. Catalytic effects of [M(ケ)(SOPD)] complexes are slightly larger compared to [M(ケ)2(SMPD)2] and [M(ケ )2(SPPD)2] complexes. On those electrodes deposited with the catalysts, the observed exchange rate constants (ko) are in the range of 0.89-2.28 】 10-7 cm/s, while it is 1.24 】 10-7 cm/s on the bare glassy carbon electrode.