Jump to main content
Jump to site search

Issue 4, 2018
Previous Article Next Article

Synthesis and characterization of [Ru(NCNHCO)(bpy)L]+ complexes and their reactivity towards water oxidation

Author affiliations

Abstract

While the role of negatively charged axial ligands (e.g. Cl, Br and I) in tuning the reactivity and stability of molecular Ru water oxidation catalysts was well-documented, less was explored when axial ligands are neutral molecules. In this work, we reported the synthesis and full characterization of [Ru(NCNHCO)(bpy)L]+ complexes (L = DMSO, 1; L = 4-picoline, 2), where L is a neutral axial ligand. The effects of these axial ligands on the stability and reactivity of the catalysts were thoroughly investigated. Both complexes were competent to oxidize water with turnover numbers up to 463 and 107, respectively. Complex 1 initiated the water oxidation involving a PCET process. It was found that complex 2 afforded its corresponding Ru–aqua complex owing to the carboxylate dissociation, while complex 1 exhibited considerable stability in acidic aqueous solutions. On the other hand, in the presence of an oxidant, for complex 1 DMSO/H2O exchange occurred, facilitating water oxidation. In contrast, the Ru–O bond cleavage of complex 2 was inhibited, leading to an inferior catalytic performance.

Graphical abstract: Synthesis and characterization of [Ru(NCNHCO)(bpy)L]+ complexes and their reactivity towards water oxidation

Back to tab navigation

Supplementary files

Publication details

The article was received on 25 Aug 2017, accepted on 04 Jan 2018 and first published on 05 Jan 2018


Article type: Paper
DOI: 10.1039/C7NJ03198J
Citation: New J. Chem., 2018,42, 2476-2482
  •   Request permissions

    Synthesis and characterization of [Ru(NCNHCO)(bpy)L]+ complexes and their reactivity towards water oxidation

    F. Cai, W. Su, H. A. Younus, K. Zhou, C. Chen, S. Chaemchuen and F. Verpoort, New J. Chem., 2018, 42, 2476
    DOI: 10.1039/C7NJ03198J

Search articles by author

Spotlight

Advertisements