Stability of doped polypyrrole studied by Mössbauer spectroscopy

Abstract Highly conducting polypyrrole doped with FeCl 3 has been studied by Mossbauer spectroscopy. Careful Mossbauer investigations show changes in the recorded spectra after exposure of the samples to air. By monitoring the Mossbauer parameters, the strength of the interaction between the polymer matrix and the doping species was observed.