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Closer to Photosystem II: A Co4O4 Cubane Catalyst with Flexible Ligand Architecture


Evangelisti, Fabio; Güttinger, Robin; Moré, René; Luber, Sandra; Patzke, Greta R (2013). Closer to Photosystem II: A Co4O4 Cubane Catalyst with Flexible Ligand Architecture. Journal of the American Chemical Society, 135(50):18734-18737.

Abstract

We introduce the novel Co4O4 complex [CoII4(hmp)4(μ-OAc)2(μ2-OAc)2(H2O)2] (1) (hmp = 2-(hydroxymethyl)pyridine) as the first Co(II)-based cubane water oxidation catalyst. Monodentate acetate and aqua ligands lend the flexible environment of 1 closest resemblance to photosystem II among its tetranuclear mimics to date. Visible-light-driven catalytic activity of 1 increases with pH value through aqua ligand deprotonation. The Co(II) core combines robustness and stability with flexibility through a new type of water-oxidation mechanism via mobile ligands.

Abstract

We introduce the novel Co4O4 complex [CoII4(hmp)4(μ-OAc)2(μ2-OAc)2(H2O)2] (1) (hmp = 2-(hydroxymethyl)pyridine) as the first Co(II)-based cubane water oxidation catalyst. Monodentate acetate and aqua ligands lend the flexible environment of 1 closest resemblance to photosystem II among its tetranuclear mimics to date. Visible-light-driven catalytic activity of 1 increases with pH value through aqua ligand deprotonation. The Co(II) core combines robustness and stability with flexibility through a new type of water-oxidation mechanism via mobile ligands.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Language:English
Date:18 December 2013
Deposited On:13 Jun 2019 09:17
Last Modified:25 Sep 2019 00:35
Publisher:American Chemical Society (ACS)
ISSN:0002-7863
OA Status:Closed
Publisher DOI:https://doi.org/10.1021/ja4098302
Project Information:
  • : FunderSNSF
  • : Grant IDPP00P2_133483
  • : Project TitleFunctional Inorganic Materials: Synthetic Strategies and Applications
  • : FunderSNSF
  • : Grant IDCRSII2_136205
  • : Project TitleHomogeneous photocatalytic water splitting

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