Particle induced X-ray emission (PIXE) and radiochemistry study of poly(pyrrole) doped with toluenesulfonate or polystyrenesulfonate anions

Poly(pyrrole) films have been prepared at constant current using two different doping ions (i.e., toluenesulfonate ions or polystyrenesulfonate ions). Particle induced X-ray emission experiments show that incorporation is reversible with toluenesulfonate anions: when the films are reduced in 0.1 mol dm−3 KNO3 solutions, all the anions incorporated during the synthesis are released. With polystyrenesulfonate ions, however, the incorporation is irreversible. It is likely that such films have cation exchanging properties. This phenomenon has been studied using barium ions, the incorporation of which was monitored using a radiochemical method.