Journal
COORDINATION CHEMISTRY REVIEWS
Volume 252, Issue 3-4, Pages 306-317Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.ccr.2007.09.004
Keywords
oxygen evolving complex; photosystem II; substrate water; ligand exchange
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Photosynthetic water oxidation proceeds via four I light- activated intermediate states. The nature of the substrate water in each of these intermediate states is important for understanding the mechanism of the photosynthetic O-O bond formation. Oxygen-18 water exchange measurements have been used to probe the binding of the substrate water at the water oxidation site in photosystem II. In this review we summarize the water exchange behaviour for a range of aqua-metal complexes for comparison with the Photosystem II exchange measurements. The analysis provides a basis for determining the nature of the substrate water in each of the intermediate states in the photosynthetic reaction cycle. (c) 2007 Elsevier B.V. All rights reserved.
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