Predicting the effect of oxidative doping on the conductivities of metal-tetrakis(dimethylphosphino)benzene coordination polymers from the electrochemical properties of their related bimetallic complexes

Abstract

Intermetallic electronic coupling in 1,2,4,5-tetrakis(dimethylphosphino)benzene bridged bimetallic Ni, Pd and Pt complexes has been studied by electrochemical and spectroelectrochemical methods. These bimetallic complexes show minimal cross-ring metal-metal interactions. The observed oxidation potential for the monometallic Ni II complex is similar to that of its bimolecular analog, but substantial shifts from the monometallic complexes are observed for the Pd II and Pt II complexes. The very low conductivities observed in the metal-phosphine coordination polymers (MNi II, Pd II, Pt II) and their partially-oxidized (p-doped) analogs are consistent with the minimal coupling observed in the bimetallic complexes.