Role of Oxido Incorporation and Ligand Lability in Expanding Redox Accessibility of Structurally Related Mn₄ Clusters.

ABSTRACT: Photosystem II supports four manganese centers through nine oxidation states from manganese(II) during assembly through to the most oxidized state before O₂ formation and release. The protein-based carboxylate and imidazole ligands allow for significant changes of the coordination environment during the incorporation of hydroxido and oxido ligands upon oxidation of the metal centers. We report the synthesis and characterization of a series of tetramanganese complexes in four of the six oxidation states from Mn^II₃Mn^III to Mn^III₂ Mn^IV₂ with the same ligand framework (L) by incorporating four oxido ligands. A 1,3,5-triarylbenzene framework appended with six pyridyl and three alkoxy groups was utiliz

SUBMITTER: Kanady JS 

PROVIDER: S-EPMC3806640 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature