An EXAFS study of bis(μ-oxo) bridged dinuclear manganese coordination compounds as models for the manganese complex of photosystem II

S. Turconi; C. P. Horwitz; Y. Ciringh; S. T. Weintraub; J. T. Warden; J. H.A. Nugent; M. C.W. Evans

doi:10.1051/jp4/1997111

An EXAFS study of bis(μ-oxo) bridged dinuclear manganese coordination compounds as models for the manganese complex of photosystem II

S. Turconi, C. P. Horwitz, Y. Ciringh, S. T. Weintraub, J. T. Warden, J. H.A. Nugent, M. C.W. Evans

Department of Biochemistry & Structural Biology

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Abstract

A complex containing four manganese centres is thought to be the catalytic site of photosynthetic water oxidation. The structure and mechanism of action of this complex are largely unknown. Mn-coordination complexes can be used as models for the manganese complex of Photosystem II(PS II). We report here an X-ray Absorption Spectroscopic study of seven different manganese coordination compounds, six of which are binuclear and contain the structural bis (μ-oxo) unit. In all the compounds, manganese is ligated by 3,3′-17-crown-6-SALPN, providing one crown ether moiety per Mn centre. Alkali or alkaline-earth cations were introduced into this crown-ether moiety in binuclear complexes, bringing the cations (Na⁺, K⁺, Ca²⁺ and Ba²⁺) into the vicinity (< 4Å) of the manganese. The results are discussed in terms of their relevance to the PSII manganese complex.

Original language	English (US)
Pages (from-to)	C2-603-C2-606
Journal	Journal De Physique. IV : JP
Volume	7
Issue number	2 Part 1
DOIs	https://doi.org/10.1051/jp4/1997111
State	Published - 1997

ASJC Scopus subject areas

Physics and Astronomy(all)

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@article{ce95962848904ddc8195585613ba74a5,

title = "An EXAFS study of bis(μ-oxo) bridged dinuclear manganese coordination compounds as models for the manganese complex of photosystem II",

abstract = "A complex containing four manganese centres is thought to be the catalytic site of photosynthetic water oxidation. The structure and mechanism of action of this complex are largely unknown. Mn-coordination complexes can be used as models for the manganese complex of Photosystem II(PS II). We report here an X-ray Absorption Spectroscopic study of seven different manganese coordination compounds, six of which are binuclear and contain the structural bis (μ-oxo) unit. In all the compounds, manganese is ligated by 3,3′-17-crown-6-SALPN, providing one crown ether moiety per Mn centre. Alkali or alkaline-earth cations were introduced into this crown-ether moiety in binuclear complexes, bringing the cations (Na+, K+, Ca2+ and Ba2+) into the vicinity (< 4{\AA}) of the manganese. The results are discussed in terms of their relevance to the PSII manganese complex.",

author = "S. Turconi and Horwitz, {C. P.} and Y. Ciringh and Weintraub, {S. T.} and Warden, {J. T.} and Nugent, {J. H.A.} and Evans, {M. C.W.}",

year = "1997",

doi = "10.1051/jp4/1997111",

language = "English (US)",

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T1 - An EXAFS study of bis(μ-oxo) bridged dinuclear manganese coordination compounds as models for the manganese complex of photosystem II

AU - Turconi, S.

AU - Horwitz, C. P.

AU - Ciringh, Y.

AU - Weintraub, S. T.

AU - Warden, J. T.

AU - Nugent, J. H.A.

AU - Evans, M. C.W.

PY - 1997

Y1 - 1997

N2 - A complex containing four manganese centres is thought to be the catalytic site of photosynthetic water oxidation. The structure and mechanism of action of this complex are largely unknown. Mn-coordination complexes can be used as models for the manganese complex of Photosystem II(PS II). We report here an X-ray Absorption Spectroscopic study of seven different manganese coordination compounds, six of which are binuclear and contain the structural bis (μ-oxo) unit. In all the compounds, manganese is ligated by 3,3′-17-crown-6-SALPN, providing one crown ether moiety per Mn centre. Alkali or alkaline-earth cations were introduced into this crown-ether moiety in binuclear complexes, bringing the cations (Na+, K+, Ca2+ and Ba2+) into the vicinity (< 4Å) of the manganese. The results are discussed in terms of their relevance to the PSII manganese complex.

AB - A complex containing four manganese centres is thought to be the catalytic site of photosynthetic water oxidation. The structure and mechanism of action of this complex are largely unknown. Mn-coordination complexes can be used as models for the manganese complex of Photosystem II(PS II). We report here an X-ray Absorption Spectroscopic study of seven different manganese coordination compounds, six of which are binuclear and contain the structural bis (μ-oxo) unit. In all the compounds, manganese is ligated by 3,3′-17-crown-6-SALPN, providing one crown ether moiety per Mn centre. Alkali or alkaline-earth cations were introduced into this crown-ether moiety in binuclear complexes, bringing the cations (Na+, K+, Ca2+ and Ba2+) into the vicinity (< 4Å) of the manganese. The results are discussed in terms of their relevance to the PSII manganese complex.

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An EXAFS study of bis(μ-oxo) bridged dinuclear manganese coordination compounds as models for the manganese complex of photosystem II

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