Synthesis of a Ru(bpy)3-type complex linked to a free terpyridine ligand and its use for preparation of polynuclear bimetallic complexes

A terpyridine ligand has been covalently linked to a Ru(bpy)3 complex via an amide bond. By using this functionalized terpyridine ligand, a series of multinuclear bimetallic complexes have been synthesized and characterized. One of these complexes has the structure of di-μ-oxo-bridged Mn dimer. EPR spectra of this complex showed that, depending on the procedure for the preparation, the oxidation states of the Mn dimer is either a Mn2III,IV dimer or a mixture of this and Mn2IV,IV dimer. Water oxidation catalyzed by this complex has been performed.