ELECTROCHEMICAL RESPONSE OF POLY(VINYLFERROCENIUM)-COATED PT ELECTRODES TO SOME ANIONS IN AQUEOUS-MEDIA

The electro oxidation behavior of iodide, thiocyanate, and cyanide on poly(vinylferrocenium)-coated Pt electrodes was investigated using cyc lic voltammetry and differential pulse anodic stripping voltammetry. I R and UV spectroscopic data, and differential scanning calorimetry (DS C) measurements indicated that these anions were incorporated in the p olymeric structure as a result of anion exchange. Anodic stripping of these anions from the film was carried out after the initial preconcen tration. Cyanide uptake was found to cause an irreversible change in t he physical properties of the film, whereas thiocyanate and iodide are merely incorporated in the film structure as counterions.