Application of Mössbauer spectroscopy to the studies of FeCl3, SnCl4 and SbCl5 doped polypyrrole

Chemically polymerized polypyrrole was chemically doped with FeCl3, SnCl4, and SbCl5. In57Fe and119Sn ME studies, samples prepared under rigorously anhydrous conditions show only one type of iron and tin with Mossbauer parameters characteristic of FeCl 4 − and SnCl5 whereas in121Sb experiments two types of antimony corresponding to SbCl3 and SbCl 6 − have been detected.From the temperature dependence of the recoil free fraction the Mossbauer lattice temperatures were estimated as 125 K and 105 K for polypyrrole doped with iron chloride and with tin chloride respectively.