Tetradentate open-chain Schiff base N,02-ligands of acacen, benacen or salen type and fluoride anions Fcoordinate to the iron(II1) cenual atom in methanol forming the complexes [Fe(N202)(CH30H)FJ. The complexes do not undergo spontaneous redox changes when kept in Lhe dark. Their irradiation into inmligand or ligand-to-metal charge transfer bands causes the photoreduction of Fe(III) to Fe(Il) associated with oxidation of metanol to its radical CH,OH. The final products of the primary photoredox and secondary dark redox processes, Fe(i1) and CH'O, are formed in a 2: 1 molar ratio, The efficiency of the axial methanol ligand photooxidation is strongly wavelength dependent and influenced by the peripheral groups R of the tetradentate ligands.
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