Uranium-mediated reductive conversion of CO2 to CO and carbonate in a single-vessel, closed synthetic cycle
作者:Anna-Corina Schmidt、Alexey V. Nizovtsev、Andreas Scheurer、Frank W. Heinemann、Karsten Meyer
DOI:10.1039/c2cc34150f
日期:——
The new neopentyl (Neop)-substituted tris(aryloxide) U(III) complex [((Neop,MeArO)3tacn)UIII] reacts with CO2 to form CO and the bridging carbonate complex [((Neop,MeArO)3tacn)UIV}2(μ-CO3)]. The uranium(IV) bridging oxo [((Neop,MeArO)3tacn)UIV}2(μ-O)] has been determined to be the intermediate in this reaction. For the first time, both U(IV) complexes can be reduced back to the U(III) starting material. Thus, with KC8 as reductant, [((Neop,MeArO)3tacn)UIII] engages in a synthetic cycle, in which CO2 is converted to CO and CO32−.
这项研究展示了一个新的新戊基(Neop)取代的三(芳氧基)U(III)配合物[((Neop,MeArO)3tacn)UIII]与CO2反应,生成CO和桥连碳酸盐配合物[((Neop,MeArO)3tacn)UIV}2(μ-CO3)]。研究确定铀(IV)桥连氧化物[((Neop,MeArO)3tacn)UIV}2(μ-O)]是该反应的中间体。首次发现这两种U(IV)配合物都能被还原�U(III)起始物。因此,使用KC8作为还原剂时,[((Neop,MeArO)3tacn)UIII]可以参与合成循环,将CO2转化为CO和CO32-。