Trigonal propeller-shaped [(Mn3MNa)-M-III-Na-II] complexes (M = Mn, Ca): structural and functional models for the dioxygen evolving centre of PSII

Two new polynuclear heterometallic cluster complexes with [(Mn3MNa)-M-III-Na-II] (M = Mn, Ca) core were synthesized using two in situ formed Schiff bases. The compounds were structurally characterized by single crystal X-ray analysis. The compound with [(MnCaNa)-Ca-III-Na-II] appeared to catalyse water oxidation which was followed by using Clark electrode and online mass spectrometry.