ELECTROACTIVE COUNTER ANIONS IN CONDUCTING POLYPYRROLE - HEXACYANOFERRATE AND HETEROPOLYTUNGSTATE IONS

Conducting polypyrrole films containing hexacyanoferrate ions and hete ropolytungstate ions wore studied for their electrochemical properties . The polymers exhibited reversible redox properties inherent to the a nions in addition to those of the polypyrrole moiety. The heteropolytu ngstate ions were retained in the polymer matrix without being ion-exc hanged after repeated potential cycles in aqueous or nonaqueous electr olyte solutions containing no heteropoly anions. The charge compensati on is effected by the transport of cations.