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 I 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. (C) 2001 Elsevier Science B.V. All rights reserved.