GAS SENSING PROPERTIES OF POLYPYRROLE DOPED WITH METALLOMACROCYCLES

摘要

The influence of electrochemical active counterions like metal complexes of phthalocyanines incorporated into the polypyrrole matrix on its chemical sensing properties has been investigated. Polypyrrole was electrochemically polymerized from aqueous solution in the presence of these electrochemical active anions, which were thereby incorporated as counterions in the polymer matrix. Spectroelectrochemical experiments show that in comparison to smaller anions the insertion of these large inherently robust macrocylic complexes into the polypyrrole matrix enhances the mechanical and chemical stability of the polymer films. The polymer films investigated exhibit new sensing properties to gases such as nitrogen oxide and dimethylmethylphosphonate, which are attributed to the sensitivity introduced by incorporated macrocyclic counterions.