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Electroanalytical applications based on the electrochemical behavior of the redox polymer, poly(viny1ferrocenium) perchlorate (PVF+C104-) coated as a film on Pt surfaces, are described. This chemically modified surface is electroactive due to the existence of femceniudfemne sites in its structure. Electrooxidation and electroreduction of other depolarizen can also take place through this polymeric film. Anions such as iodide, thiocyauate and cyanide are incorporated in the polymeric structure as a result of anion exchange. Ancdic stripping of the anions from'the film can be canied out after the initial preconcentration. Catalytic reduction and oxidation of anthracene occur on the PVFcClO4- coated Pt surface in acetonitrildTBAP medium. An enzyme such as glucose oxidase could be immobilized in the polymeric matrix and this surface could be used for the amperometric determination of glucose under aerobic conditions. Coimmobilization of two enzymes, glucose oxidase and invertase, in the same polymeric matrix allows for the development of an amperometric sucrose sensor.

Electroanalysis and electrocatalysis using poly(vinylferrocenium) perchlorate coated electrodes