Chemical and photochemical water oxidation catalyzed by novel ruthenium complexes comprising a negatively charged NCNHCO ligand

Wei Su, Hussein A. Younus, Kui Zhou, Zafar A.K. Khattak, Somboon Chaemcheun, Cheng Chen, Francis Verpoort

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Incorporation of negatively charged moieties into complexes is a promising strategy to develop water oxidation catalysts with high stability and low over-potentials. We reported here the synthesis of a novel pincer-type ligand precursor, 1-(pyridin-2-ylmethyl)-3-methylcarboxylate-imidazolium (1). Deprotonation of C2-H of 1 resulted in formation of NCNHCO, a negatively charged asymmetric N-heterocyclic carbene (NHC). Complexes [Ru(NCNHCO)(terpy)]+ (2) and RuCl(NCNHCO)(DMSO)(pic) (3) were prepared and capable of decomposing water chemically and photo-chemically. Under acidic conditions, 4-picoline/H2O exchange in 3 was detected by UV-vis and 1H NMR, forming the corresponding Ru-aqua complex. In a typical three-component light-induced water oxidation, a turnover number of 273 was attained employing 3, which demonstrated catalytic ability comparable to those state-of-the-art catalysts.

Original languageEnglish
Pages (from-to)387-395
Number of pages9
JournalCatalysis Science and Technology
Volume7
Issue number2
DOIs
Publication statusPublished - 1 Jan 2017

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Ruthenium
Ligands
Oxidation
Water
Picolines
Deprotonation
Catalysts
Dimethyl Sulfoxide
Nuclear magnetic resonance

ASJC Scopus subject areas

  • Catalysis

Cite this

Chemical and photochemical water oxidation catalyzed by novel ruthenium complexes comprising a negatively charged NCNHCO ligand. / Su, Wei; Younus, Hussein A.; Zhou, Kui; Khattak, Zafar A.K.; Chaemcheun, Somboon; Chen, Cheng; Verpoort, Francis.

In: Catalysis Science and Technology, Vol. 7, No. 2, 01.01.2017, p. 387-395.

Research output: Contribution to journalArticle

Su, Wei ; Younus, Hussein A. ; Zhou, Kui ; Khattak, Zafar A.K. ; Chaemcheun, Somboon ; Chen, Cheng ; Verpoort, Francis. / Chemical and photochemical water oxidation catalyzed by novel ruthenium complexes comprising a negatively charged NCNHCO ligand. In: Catalysis Science and Technology. 2017 ; Vol. 7, No. 2. pp. 387-395.
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