ИСТИНА

The Chlorophyll a derivatives are of a great interest as potential biologically active compounds. Study of their electrochemical properties can be used for the prediction of biological activity. In this work the redox properties of L1 and L2 as well as of their metallocomplexes with biometals L1(Cu), L1(Co),L1(Ni), L1(Zn) and L1(Cu), L2(Co), L2(Ni), L2(Zn) were studied in CH3CN using the cyclic voltammetry (CV) and rotating disk electrode techniques.In the case of all metalloporphyrins the peaks corresponding to ligand oxidation and reduction are substantially shifted to the more negative region comparing L1 and L2. This fact points out the back-donation effect of the metal. The reversibility of Co(II)→Co(III) and the low potential of this step makes L1(Co) interesting from the biomimetic point of view as a perspective reductase active site model.