化学
卡宾
钳子运动
过电位
循环伏安法
催化作用
二聚体
锰
吡啶
结晶学
协调球
药物化学
光化学
无机化学
立体化学
电化学
晶体结构
有机化学
电极
物理化学
作者
Tessa H. T. Myren,Alyssia M. Lilio,Chloe G. Huntzinger,Jonathan W. Horstman,Taylor A. Stinson,Trevor B. Donadt,Curtis E. Moore,Bimala Lama,Hans H. Funke,Oana R. Luca
出处
期刊:Organometallics
[American Chemical Society]
日期:2018-11-19
卷期号:38 (6): 1248-1253
被引量:44
标识
DOI:10.1021/acs.organomet.8b00535
摘要
We report the synthesis, characterization, and catalytic CO2 reduction activity of two LMn(CO)3Br complexes with carbene-pyridine-carbene pincer ligands, [MnCNCMe]Br 1 and [MnCNCBn]Br (Bn = benzyl) 2. X-ray crystallography reveals an octahedral coordination environment with an outer sphere Br anion for 1. Catalyst 2 performs the reduction of CO2 to CO at 100 mV more positive potential with similar current densities as 1. We hypothesize the bulkier benzyl arms on the pincer hinder formation of a dimer. They also alter the wingtip electronics, enabling operation at a lower overpotential. We use normal pulse voltammetry and diffusion ordered spectroscopy to quantify a 1e– reduction per manganese center at the catalytic onset. We now show turnover even in the absence of added protons..
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