ELECTROCHEMICAL REDUCTION OF CARBON-DIOXIDE BY HEXA-AZAMACROCYCLIC COMPLEXES

Diethenodypyrido-hexa-aza-tetradecine complexes act as a tetradentate ligand, and its complexes of Co(II), Ni(II) and Cu(II), are essentially planar. This work shows electrochemical, radiolytic and spectroscopic studies of electron transfer processes and solution equilibria. The presence of carbon dioxide notoriously change the optical properties in solution. Some pulse radiolysis studies for the reduction process of these complexes in carbon dioxide medium are also shown. In addition, electrochemical studies were performed in carbon dioxide atmosphere in order to obtain preliminary information about electrocatalytical reductions.