Journal
CHEMICAL PHYSICS LETTERS
Volume 506, Issue 1-3, Pages 98-103Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2011.02.030
Keywords
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Funding
- [19750046]
- [19350070]
- [18350008]
- Grants-in-Aid for Scientific Research [21550014, 23550016] Funding Source: KAKEN
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UB3LYP calculations were first performed to elucidate electronic and spin structures of the CaMn4O5 cluster in the oxygen-evolving-complex of the PSII system refined to the 1.9 angstrom X-ray resolution by Kamiya, Shen, and their collaborators. Eight different UB3LYP solutions with axial spin structures were constructed to obtain the energy levels of the cluster on the basis of their X-ray structure. The energy diagrams were analyzed in terms of the Heisenberg model that involves six effective-exchange integrals between manganese ions. Several characteristic features of the electronic states of the cluster are revealed from these theoretical investigations based on the UB3LYP calculations. (C) 2011 Elsevier B.V. All rights reserved.
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