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Synthesis and catalytic water oxidation activities of ruthenium complexes containing neutral ligands
Royal Institute of Technology (KTH).
Royal Institute of Technology (KTH).
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK).
Royal Institute of Technology (KTH).
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2011 (English)In: Chemistry - A European Journal, ISSN 0947-6539, E-ISSN 1521-3765, Vol. 17, no 34, 9520-9528 p.Article in journal (Refereed) Published
Abstract [en]

Two dinuclear and one mononuclear ruthenium complexes containing neutral polypyridyl ligands have been synthesised as pre-water oxidation catalysts and characterised by 1H and 13C NMR spectroscopy and ESI-MS. Their catalytic water oxidation properties in the presence of [Ce-(NH4)2(NO3)6] (CeIV) as oxidant at pH 1.0 have been investigated. At low concentrations of CeIV (5 mM), high turnover numbers of up to 4500 have been achieved. An 18O-labelling experiment established that both O atoms in the evolved O2 originate from water. Combined electrochemical study and electrospray ionisation mass spectrometric analysis suggest that ligand exchange between coordinated 4-picoline and free water produces Ru aquo species as the real water oxidation catalysts.

Place, publisher, year, edition, pages
Wiley-VCH Verlagsgesellschaft, 2011. Vol. 17, no 34, 9520-9528 p.
Keyword [en]
homogeneous catalysis; isotopic labeling; neutral ligands; ruthenium; water oxidation
National Category
Organic Chemistry
Identifiers
URN: urn:nbn:se:su:diva-65543DOI: 10.1002/chem.201100274ISI: 000294784400033OAI: oai:DiVA.org:su-65543DiVA: diva2:464333
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Available from: 2011-12-13 Created: 2011-12-12 Last updated: 2017-12-08Bibliographically approved

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Åkermark, TorbjörnLee, Bao-LinÅkermark, Björn
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Department of Materials and Environmental Chemistry (MMK)Department of Organic Chemistry
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