Solid State and Electrochemical Studies of Poly (dimethylsilane) and Poly (dimethylstannum) Film Electrodes

Dialkyl substituted polysilane and poly stannane were successfully synthesized by an electrochemical method, who's M.Wt were 2175 and 2650 respectively. Thin films were prepared by PVD method of thickness 50-60 μm. FTIR, NMR and UV-Vis studies reveal that the polymer contains Si-Si and Sn-Sn catenation. CV measurements show the reduction peak of the polymers and give reversible response for the Fe³⁺/Fe²⁺ redox couple and impedance study at different cathodic potentials clearly indicate that both the polymers at less negative potentials behave like capacitive in nature and at more negative potentials behave like charge transfer carrier. MS plot for these polymers reveal that the polymers are semi-conducting materials of narrow band gap with high carrier densities and are p-type carriers.