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 essentiall y planar. This work shows electrochemical, radiolytic and spectroscopi c studies of electron transfer processes and solution equilibria. The presence of carbon dioxide notoriously change the optical properties i n 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 i n order to obtain preliminary information about electrocatalytical red uctions.