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Synthesis and Catalytic Water Oxidation Activities of Ruthenium Complexes Containing Neutral Ligands
Author(s) -
Xu Yunhua,
Duan Lele,
Åkermark Torbjörn,
Tong Lianpeng,
Lee BaoLin,
Zhang Rong,
Åkermark Björn,
Sun Licheng
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201100274
Subject(s) - ruthenium , catalysis , chemistry , electrospray ionization , ligand (biochemistry) , electrochemistry , turnover number , inorganic chemistry , mass spectrometry , redox , photochemistry , organic chemistry , electrode , chromatography , biochemistry , receptor
Abstract Two dinuclear and one mononuclear ruthenium complexes containing neutral polypyridyl ligands have been synthesised as pre‐water oxidation catalysts and characterised by 1 H and 13 C NMR spectroscopy and ESI‐MS. Their catalytic water oxidation properties in the presence of [Ce(NH 4 ) 2 (NO 3 ) 6 ] (Ce IV ) as oxidant at pH 1.0 have been investigated. At low concentrations of Ce IV (5 m M ), high turnover numbers of up to 4500 have been achieved. An 18 O‐labelling experiment established that both O atoms in the evolved O 2 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.