FTIR spectroscopic investigations of polyaniline derivatives-palladium systems

Ring-substituted polyaniline derivatives: poly(o-toluidine) (POT) and poly(o-chloroaniline) (POC) have been treated with PdCl2 solutions in 0.1 and 1 M HCl. Polymer-palladium systems thus obtained have been studied by vibrational spectroscopic methods (MIR, FIR, Raman) and chemical analysis. Results have been compared with those obtained for unsubstituted polyaniline (PANI)-palladium systems prepared under similar experimental conditions as well as for POT, POC, PANI treated with 0.1 and 1 M HCl. It has been found that in all the cases polymers are protonated. Substitution of one hydrogen atom in PANI ring with -Cl and -CH3 influences the basic and redox properties of the parent polymer The lowest reactivity towards palladium ions has been observed in the case of POC.