Reconstruction of the water-oxidizing complex in manganese-depleted Photosystem II by using Schiff base manganese complexes

The efficiency of Schiff base manganese complexes in reconstituting Photosystem II (PS II) electron flow and oxygen-evolution capacity was analyzed in PS II deprived of their manganese cluster and the extrinsic regulatory subunits. Three Schiff base complexes, mononuclear Mn(salpn)2, binuclear [Mn(salpn)]2(ClO4)2 and μ-oxo binuclear [Mn(salpn)O]2, salpn: 1,3-bis(salicylideneamino)propane, were used for reconstruction of electron transport and oxygen evolution. Order of reconstruction effect is as follows: μ-oxo binuclear Mn(III) > binuclear Mn(III) > mononuclear Mn(II).