Issue 37, 2016

Tailored design of ruthenium molecular catalysts with 2,2′-bypyridine-6,6′-dicarboxylate and pyrazole based ligands for water oxidation

Abstract

With the incorporation of pyrazole and DMSO as axial ligands, a series of tailor-designed Ru water oxidation catalysts [Ru(bda)(DMSO)(L)] (H2bda = 2,2′-bypyridine-6,6′-dicarboxylic acid; DMSO = dimethyl sulfoxide; L = pyrazole, A-1; 4-Br-3-methyl pyrazole, B-1) and [Ru(bda)(L)2] (L = pyrazole, A-2; 4-Br-3-methyl pyrazole, B-2) have been generated in situ from their corresponding precursors [Ru(κ3O,N,N-bda)(DMSO)x(L)3−x] which are in a zwitterionic form with an extra pyrazole based ligand in the equatorial position. Formation of the active catalyst has been investigated under pH 1.0 conditions. Electrochemistry and water oxidation activity of these catalysts were investigated. By fine tuning of the catalyst structure, the turnover frequency was increased up to 500 s−1 and the stability over 6000 turnovers.

Graphical abstract: Tailored design of ruthenium molecular catalysts with 2,2′-bypyridine-6,6′-dicarboxylate and pyrazole based ligands for water oxidation

Supplementary files

Article information

Article type
Paper
Submitted
04 Apr 2016
Accepted
16 May 2016
First published
31 May 2016

Dalton Trans., 2016,45, 14689-14696

Tailored design of ruthenium molecular catalysts with 2,2′-bypyridine-6,6′-dicarboxylate and pyrazole based ligands for water oxidation

Q. Daniel, L. Wang, L. Duan, F. Li and L. Sun, Dalton Trans., 2016, 45, 14689 DOI: 10.1039/C6DT01287F

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