Electron spin resonance spectroscopy and electrical conductivity studies on some polyaniline salts and their bases

Four different polyaniline salts have been prepared by chemical oxidative polymerization of aniline with benzoyl peroxide as a novel oxidant employing inverse emulsion method at ambient temperature using different protonic acids (HCl, $H_2SO_4, H_3PO_4$ and sulphosalicylic acid). Their corresponding bases have been obtained by dedoping the salts with aqueous ammonium hydroxide. The polyaniline HCl salt exhibits the highest room temperature conductivity (2.31 S cm-1). Temperature dependent EPR studies reveal Curie-Weiss and thermally activated paramagnetism for the polyaniline salts. No correlation between the magnetic properties and conductivity could be found