Electrosynthesis and characterisation of polypyrrole doped with [Bi(dmit) 2]

The electrosynthesis and characterisation of polypyrrole doped with [Bi(dmit) 2] −(Ppy/[Bi(dmit) 2]) are reported. It was shown by means of IR spectroscopy that the anion [Bi(dmit) 2] − is incorporated into the polymeric matrix. Thermogravimetric analysis showed that Ppy/[Bi(dmit) 2] decomposes at 180 °C, a higher temperature than [NBu 4][Bi(dmit) 2] or Ppy/DS. Cyclic voltammetry of Ppy/[Bi(dmit) 2] exhibited one irreversible process with peak potentials independent of the scan rate. The superficial conductivity is about 10 −4 S cm −1 and the material presented a double-layer capacitance of 70.5 μF cm −2, approximately twice that of Ppy/DS.