Dataset Information

Thermodynamics of Proton and Electron Transfer in Tetranuclear Clusters with Mn-OH₂/OH Motifs Relevant to H₂O Activation by the Oxygen Evolving Complex in Photosystem II.

ABSTRACT: We report the synthesis of site-differentiated heterometallic clusters with three Fe centers and a single Mn site that binds water and hydroxide in multiple cluster oxidation states. Deprotonation of Fe^III/II₃Mn^II-OH₂ clusters leads to internal reorganization resulting in formal oxidation at Mn to generate Fe^III/II₃Mn^III-OH. ⁵⁷Fe Mössbauer spectroscopy reveals that oxidation state changes (three for Fe^III/II₃Mn-OH₂ and four for Fe^III/II₃Mn-OH clusters) occur exclusively at the Fe centers; the Mn center is formally Mn^II when water is bound and Mn^III when hydroxide is bound. Experimentally determined p K_a (17.4) of the

SUBMITTER: Reed CJ

PROVIDER: S-EPMC6277146 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature

ACCESS DATA

Dataset Information

Thermodynamics of Proton and Electron Transfer in Tetranuclear Clusters with Mn-OH₂/OH Motifs Relevant to H₂O Activation by the Oxygen Evolving Complex in Photosystem II.

OmicsDI is part of the ELIXIR infrastructure

Tweets

Dataset Information

Thermodynamics of Proton and Electron Transfer in Tetranuclear Clusters with Mn-OH2/OH Motifs Relevant to H2O Activation by the Oxygen Evolving Complex in Photosystem II.

OmicsDI is part of the ELIXIR infrastructure

Tweets

Thermodynamics of Proton and Electron Transfer in Tetranuclear Clusters with Mn-OH₂/OH Motifs Relevant to H₂O Activation by the Oxygen Evolving Complex in Photosystem II.