A series of molecular complexes have been prepared, the first complexes (1  and 2 ) combining carboxylate, imidazole and phenol functions, while complex 3  contains a diamide bis(pyridine) ligand. Complex 2  is the most efficient catalyst thus far, using [Ru(bpy)3]3+ as terminal oxidant. Catalyst 3  is less efficient and yields the carbon monoxide complex 4 , which is inactive, and suggests an unexpected mode of deactivation of water oxidation catalysts. Figure 1.  Molecular structures of complexes 1 -4  (M = Mn, Fe or Co; L = 4-picoline).

Molecular catalysts for water oxidation

245th National Meeting (2013)

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