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Catalytic Water Oxidation by a Molecular Ruthenium Complex: Unexpected Generation of a Single-Site Water Oxidation Catalyst
Stockholm University, Faculty of Science, Department of Organic Chemistry.
Stockholm University, Faculty of Science, Department of Organic Chemistry.ORCID iD: 0000-0002-6089-5454
Stockholm University, Faculty of Science, Department of Organic Chemistry.
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).ORCID iD: 0000-0003-4053-7147
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2015 (English)In: Inorganic Chemistry, ISSN 0020-1669, E-ISSN 1520-510X, Vol. 54, no 10, p. 4611-4620Article in journal (Refereed) Published
Abstract [en]

The increasing energy demand calls for the development of sustainable energy conversion processes. Here, the splitting of H2O to O-2 and H-2, or related fuels, constitutes an excellent example of solar-to-fuel conversion schemes. The critical component in such schemes has proven to be the catalyst responsible for mediating the four-electron oxidation of H2O to O-2. Herein, we report on the unexpected formation of a single-site Ru complex from a ligand envisioned to accommodate two metal centers. Surprising N-N bond cleavage of the designed dinuclear ligand during metal complexation resulted in a single-site Ru complex carrying a carboxylate amide motif. This ligand lowered the redox potential of the Ru complex sufficiently to permit H2O oxidation to be carried out by the mild one-electron oxidant [Ru(bpy)(3)](3+) (bpy = 2,2'-bipyridine). The work thus highlights that strongly electron-donating ligands are important elements in the design of novel, efficient H2O :oxidation catalysts.

Place, publisher, year, edition, pages
2015. Vol. 54, no 10, p. 4611-4620
National Category
Organic Chemistry
Research subject
Organic Chemistry
Identifiers
URN: urn:nbn:se:su:diva-118542DOI: 10.1021/ic502755cISI: 000354908000008OAI: oai:DiVA.org:su-118542DiVA, id: diva2:826016
Funder
Swedish Research CouncilKnut and Alice Wallenberg FoundationCarl Tryggers foundation Available from: 2015-06-24 Created: 2015-06-22 Last updated: 2022-02-23Bibliographically approved

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Rabten, WangchukKärkäs, Markus D.Åkermark, TorbjörnChen, HongTinnis, FredrikSun, JunliangSiegbahn, Per E. M.Andersson, Pher G.Åkermark, Björn

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Rabten, WangchukKärkäs, Markus D.Åkermark, TorbjörnChen, HongTinnis, FredrikSun, JunliangSiegbahn, Per E. M.Andersson, Pher G.Åkermark, Björn
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Department of Organic ChemistryDepartment of Materials and Environmental Chemistry (MMK)
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