Synthesis and catalytic water oxidation activities of ruthenium complexes containing neutral ligands
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
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.
homogeneous catalysis; isotopic labeling; neutral ligands; ruthenium; water oxidation
IdentifiersURN: urn:nbn:se:su:diva-65543DOI: 10.1002/chem.201100274ISI: 000294784400033OAI: oai:DiVA.org:su-65543DiVA: diva2:464333
FunderSwedish Research CouncilKnut and Alice Wallenberg Foundation