Dinuclear Rhenium Complex with a Proton Responsive Ligand as a Redox Catalyst for the Electrochemical CO2 Reduction.
Dinuclear Rhenium Complex with a Proton Responsive Ligand as a Redox Catalyst for the Electrochemical CO2 Reduction.
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具有质子响应配体的双核铼络合物作为电化学 CO2 还原的氧化还原催化剂
DOI:
10.1021/acs.inorgchem.7b00178
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发表时间:
2017
影响因子:
4.6
通讯作者:
I. Siewert
中科院分区:
文献类型:
--
作者:
A. Wilting;T. Stolper;R. A. Mata;I. Siewert
Herein, we present the reduction chemistry of a dinuclear α-diimine rhenium complex,1, [Re2(L)(CO)6Cl2], with a proton responsive ligand and its application as a catalyst in the electrochemical CO2reduction reaction (L = 4-tert-butyl-2,6-bis(6-(1H-imidazol-2-yl)-pyridin-2-yl)phenol). The complex has a phenol group in close proximity to the active center, which may act as a proton relay during catalysis, and pyridine-NH-imidazole units as α-diimine donors. The complex is an active catalyst for the electrochemical CO2reduction reaction. CO is the main product after catalysis, and only small amounts of H2were observed, which can be related to the ligand reactivity. Theic/ipratio of 20 in dimethylformamide (DMF) + 10% water for1points to a higher activity with regard to [Re(bpy)(CO)3Cl] in MeCN/H2O, albeit1requires a slightly larger overpotential (bpy = 2,2′-bipyridine). Spectroscopic and theoretical investigations revealed detailed information about the reduction chemistry of1. The complex exhibits two reduction processes in DMF, and each process was identified as a two-electron reduction in the absence of CO2. The first 2e–reduction is ligand based and leads to homolytic N–H bond cleavage reactions at the imidazole units of1, which is equal to a net double proton removal from1forming [Re2(LH–2)(CO)6Cl2]2–. The second 2e–reduction process has been identified as an O–H bond cleavage reaction at the phenol group, removal of chloride ions from the coordination spheres of the metal ions, and a ligand-centered one-electron reduction of [Re2(LH–3)(CO)6Cl]2–. In the presence of CO2, the second reduction process initiates catalysis. The reduced species is highly nucleophilic and likely favors the reaction with CO2instead of O–H bond cleavage.
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影响因子:
2.8
作者:
A. Canty;Christopher V. Lee
通讯作者:
Christopher V. Lee
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
A. Breikss;H. Abruña
通讯作者:
H. Abruña
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
Kyle A. Grice;C. Kubiak
通讯作者:
C. Kubiak
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
中村賀美;竹内孝江
通讯作者:
竹内孝江
影响因子:
4
作者:
Y. Yamazaki;Tatsuki Morimoto;O. Ishitani
通讯作者:
Y. Yamazaki;Tatsuki Morimoto;O. Ishitani