CATALASE-LIKE ACTIVITY OF TRIETHYLENEGLYCOL DIMETHACRYLATE-CROSS-LINKED POLYACRYLAMIDE-SUPPORTED METAL-COMPLEXES

The catalase-like activity of complexes resulting from the interaction between triethyleneglycol dimethacrylate crosslinked polyacrylamide a mine and metal ions such as Cu(II), Cr(III), Fe(III), Mn(II) and Pb(II ) has been investigated. The decomposition of H2O2 was chosen as a mod el reaction for this purpose. The percentage conversion of H2O2 was fo und to be in the order Mn(II) > Cu(II) > Fe(III) > Cr(III) > Pb(II) co mplexes. The catalytic activity was found to depend upon the initial c oncentration of H2O2, amount of the complex, temperature and pH of the solution. The activation energy of H2O2 decomposition was calculated to be 10.26 kJ mol(-1). The polymeric metal complex catalysts could be reused four times without any reduction in activity. (C) 1997 Elsevie r Science Ltd.