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Chemical, Electrochemical, and Photochemical Catalytic Oxidation of Water to Dioxygen with Mononuclear Ruthenium Complexes
Author(s) -
Roeser Stephan,
Farràs Pau,
Bozoglian Fernando,
MartínezBelmonte Marta,
BenetBuchholz Jordi,
Llobet Antoni
Publication year - 2011
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201000358
Subject(s) - chemistry , ruthenium , cyclic voltammetry , ligand (biochemistry) , redox , catalysis , electrochemistry , medicinal chemistry , photochemistry , coulometry , pyridine , pyrazole , inorganic chemistry , crystallography , organic chemistry , electrode , biochemistry , receptor
Four new Ru II Cl and Ru II H 2 O complexes containing the meridional 2,2’:6’,2”‐terpyridine (trpy) ligand and the chelating 2‐(5‐phenyl‐ 1H ‐pyrazol‐3‐yl)pyridine (H3p) ligand of general formula in ‐ and out ‐[Ru II (trpy)(H3p)(X)] n + (X=Cl, n =1; X=H 2 O, n =2) have been prepared, isolated and thoroughly characterized both in solution and in the solid state. In solution, all the complexes are characterized spectroscopically by UV/Vis and NMR, and their redox properties investigated by means of cyclic voltammetry, square wave voltammetry, and coulometry. In the solid state, monocrystal X‐ray diffraction analysis was carried out for the in and out RuCl complexes. The capacity of the Ru‐aqua complexes to act as water oxidation catalysts (WOCs) was also investigated chemically, electrochemically, and photochemically. The performance of these complexes has also been compared to two previously described complexes of general formula in ‐ and out ‐[Ru II (trpy)(Hbpp)(H 2 O)] 2+ (Hbpp is 2,2′‐(1 H ‐pyrazole‐3,5‐diyl)dipyridine)), the capacity of which as WOCs had not been previously described.