Strategies for synthesizing Mn_4CaOn models relevant to biological water oxidation
Abstract
The biol. site of water oxidn.-the oxygen-evolving complex (OEC) of photosystem II-is a Mn_4CaO_5 heterometallic cluster, proposed to contain a Mn-_3CaO_4 cubane / open cubane unit with a fourth, dangling Mn bridged to the cubane through two oxido ligands. In past work we synthesized a Mn_3CaO_4 cubane supported by three acetates and a 1, 3,5-triarylbenzene framework contg. six pyridines and three alkoxides. More recently, incorporation of a fifth metal center has been targeted to complete the Mn_4Ca stoichiometry. A desymmetrized Mn_3CaO_4 complex has been made with reactivity complementary to the parent, sym. complex; synthetic strategies from this desymmetrized complex toward more accurate Mn4Ca models of the OEC will be discussed. Redox and acid/base reactivity will also be discussed, as both are relevant to the mechanism of water oxidn.
Additional Information
© 2014 American Chemical Society.Additional details
- Alternative title
- Strategies for synthesizing Mn4CaOn models relevant to biological water oxidation
- Eprint ID
- 48473
- Resolver ID
- CaltechAUTHORS:20140813-084102380
- Created
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2014-08-13Created from EPrint's datestamp field
- Updated
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2020-03-09Created from EPrint's last_modified field