Cyclic voltammetry of zeolite-supported manganese porphyrins

Abstract

The electrochemical behaviour of adsorbed 5,10,15,20-tetra(4-N-methylpyridinium)porphyrinatomanganese(III) complex on ZSM-5 and EMC-2 zeolites and VPI-5 molecular sieve has been investigated by cyclic voltammetry. The results show that the redox potential of the Mn^III/Mn^II process of the fixed porphyrins can be measured by this technique by using a pressed powder composite electrode. These potentials are positively shifted, by 50 to 380 mV according to the zeolite matrices, relative to the unlinked complex.