Influence of perrhenate anion on electrochemical and spectroelectrochemical properties of poly-o-phenylenediamine

Cyclic voltammetry was used to reveal that electric potential cycling of poly-o-phenylenediamine films, deposited on conductive ITO glass, in sulfuric acid solutions of ammonium perrhenate results in modifying the film with rhenium oxides. The modification manifests itself in an increase in charge of film reversible redox transformation and electric potential shift towards positive values, as well as in some transformation of electronic absorption spectra. It is believed that the modification is caused by accumulation in the polymeric film of rhenium compounds undergoing reversible redox transformations