The Study of Redox of Polypyrrole Dopped with Tif62-with Electrochemical Quartz Crystal Microbalance

Polypyrrole (PPy) has been dopped with anion TiF62- electrochemically on Au/quartz electrode. Redox property of polypyrrole film is studied with cyclicvoltammetry in small and large cation solutions. During redox process, the change of mass of polypyrrole film can be observed with electrochemical Quartz Crystal microbalance. The results shows that anion TiF62- can be released in/from the polymer film during cyclicvoltammetry. This behavior depends on the type of cation in solution. Large cation such as tetra-butylamonium (C4H9)4N+ cannot be dopped in polymer, so anion TiF62- is predominant for being released in/from the polymer film. In solution with small cation Na+, the PPy redox potential is more negative. The peak of oxidation is shifted to negative direction. Cation Na+ is released in/from polymer film dominantly, changing the mass of polyme