Functionalized conducting polymers for chemical sensors -An in situ ESR/UV-Vis-NIR voltammetric study

摘要

The redox and optical properties of various well defined polymer and copolymer films containing pyrrole or thiophene units were studied. The in situ ESR/UV-Vis-NIR spectroelectrochemistry was applied to investigate polymers and copolymers deposited both electrochemically or by a special chemical procedure using adhesion promoter onto the optically transparent indium-tin-oxide (ITO) electrodes. The spectroelectrochemical responses of chemically and electrochemically prepared polythiophenes on ITO were compared and the electronic structures of both polymers found to be similar. In situ ESR/UV-Vis-NIR voltammetric studies on electrochemically prepared copolymers containing pyrrole units and various N,N'-ethylene-bis(salicylidenimine) (salen) transition metal complexes indicate the presence of both polysalen and polypyrrole redox active centers in the copolymer.