| Literature DB >> 25609387 |
Zoel Codolà1, Laura Gómez2, Scott T Kleespies3, Lawrence Que3, Miquel Costas1, Julio Lloret-Fillol1.
Abstract
The non-haem iron complex α-[Fe(II)(CF3SO3)2(mcp)] (mcp=(N,N'-dimethyl-N,N'-bis(2-pyridylmethyl)-1,2-cis-diaminocyclohexane) reacts with Ce(IV) to oxidize water to O2, representing an iron-based functional model for the oxygen evolving complex of photosystem II. Here we trap an intermediate, characterized by cryospray ionization high resolution mass spectrometry and resonance Raman spectroscopy, and formulated as [(mcp)Fe(IV)(O)(μ-O)Ce(IV)(NO3)3](+), the first example of a well-characterized inner-sphere complex to be formed in cerium(IV)-mediated water oxidation. The identification of this reactive Fe(IV)-O-Ce(IV) adduct may open new pathways to validate mechanistic notions of an analogous Mn(V)-O-Ca(II) unit in the oxygen evolving complex that is responsible for carrying out the key O-O bond forming step.Entities:
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Year: 2015 PMID： 25609387 PMCID： PMC4722336 DOI： 10.1038/ncomms6865
Source DB: PubMed Journal: Nat Commun ISSN： 2041-1723 Impact factor: 14.919