CO2 Fixation and Transformation by a Dinuclear Copper Cryptate under Acidic Conditions |
| |
| Authors: | Jia‐Mei Chen Wei Wei Xiao‐Long Feng Tong‐Bu Lu Prof Dr |
| |
| Institution: | MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, State Key Laboratory of Optoelectronic Materials and School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275, China, Fax: (+86)?20‐84112921 |
| |
| Abstract: | CO2 fixation and transformation by metal complexes continuously receive attention from the viewpoint of carbon resources and environmental concerns. We found that the dinuclear copper(II) cryptate Cu2L1](ClO4)4 ( 1 ; L1=N(CH2)2NHCH2(m‐C6H4)CH2NH‐(CH2)2]3N) can easily take up atmospheric CO2 even under weakly acidic conditions at room temperature and convert it from bicarbonate into carbonate monoesters in alcohol solution. The compounds Cu2L1(μ‐O2COH)](ClO4)3 ( 2 ), Cu2L1(μ‐O2COR)](ClO4)3 ( 3 : R=CH3; 4 : R=C2H5; 5 : R=C3H7; 6 : R=C4H9; 7 : R=C5H11; 8 : R=CH2CH2OH), Cu2L1(μ‐O2CCH3)](ClO4)3 ( 9 ), and Cu2L1(OH2)(NO3)](NO3)3 ( 10 ) were characterized by IR spectroscopy and ESI‐MS. The crystal structures of 2 – 6 and 10 were studied by single‐crystal X‐ray diffraction analysis. On the basis of the crystal structures, solution studies, and DFT calculations, a possible mechanism for CO2 fixation and transformation is given. |
| |
| Keywords: | absorption carbon dioxide fixation copper cryptands density functional calculations |
|
|
