Within photosynthetic organisms, the oxygen-evolving complex (OEC) of photosystem II generates dioxygen from water using a catalytic Mn4CaOn cluster (n varies with the mechanism and nature of the intermediate). We report here the rational synthesis of a [Mn3CaO4](6+) cubane that structurally models the trimanganese-calcium-cubane subsite of the OEC. Structural and electrochemical comparison between Mn3CaO4 and a related Mn4O4 cubane alongside characterization of an intermediate calcium-manganese multinuclear complex reveals potential roles of calcium in facilitating high oxidation states at manganese and in the assembly of the biological cluster.
机构:
Univ London Imperial Coll Sci Technol & Med, Div Mol Biosci, London SW7 2AZ, EnglandUniv London Imperial Coll Sci Technol & Med, Div Mol Biosci, London SW7 2AZ, England
Barber, James
Murray, James W.
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机构:
Univ London Imperial Coll Sci Technol & Med, Div Mol Biosci, London SW7 2AZ, EnglandUniv London Imperial Coll Sci Technol & Med, Div Mol Biosci, London SW7 2AZ, England
机构:
Univ London Imperial Coll Sci Technol & Med, Div Mol Biosci, London SW7 2AZ, EnglandUniv London Imperial Coll Sci Technol & Med, Div Mol Biosci, London SW7 2AZ, England
Barber, James
Murray, James W.
论文数: 0引用数: 0
h-index: 0
机构:
Univ London Imperial Coll Sci Technol & Med, Div Mol Biosci, London SW7 2AZ, EnglandUniv London Imperial Coll Sci Technol & Med, Div Mol Biosci, London SW7 2AZ, England