Electrocatalytic water oxidation by nickel complexes: The effect of coordination number and ligand backbone structure on catalytic properties

Two novel Ni complexes, [Ni(MePy2tacn)(H2O)](ClO4)2 (1, MePy2tacn = 1-methyl-4,7-bis(2-picolyl)-1,4,7-triazacyclononane) and [Ni(Py3tacn)](ClO4)2 (2, Py3tacn = 1,4,7-tris(2-picolyl)-1,4,7-triazacyclononane), are developed as electrocatalysts for water oxidation under near neutral conditions. It is found that...