离子液体
催化作用
产量(工程)
化学
大气压力
离子键合
溶剂
环加成
傅里叶变换红外光谱
红外光谱学
碳酸二甲酯
碳酸盐
无机化学
钋
化学工程
四氟硼酸盐
材料科学
铵
盐(化学)
有机化学
作者
Tengfei Wang,Danning Zheng,Beibei An,Yi Liu,Tiegang Ren,Hans Ågren,Li Wang,Jinglai Zhang,Mårten S. G. Ahlquist
标识
DOI:10.1016/j.gee.2021.02.011
摘要
Novel dual-ionic imidazolium salts are shown to display excellent catalytic activity for cycloaddition of carbon dioxide and epoxides under room temperature and atmospheric pressure (0.1 MPa) without any solvent and co-catalyst leading to 96.1% product yield. It can be reused five times to keep the product yield over 90%. These intriguing results are attributed to a new reaction mechanism, which is supported by theoretical calculations along with the measurements of 13 C NMR spectrum and Fourier transform infrared spectroscopy (FT-IR). The excellent catalytic activity can be traced to a CO 2 -philic group along with an electrophilic hydrogen atom. Our work shows that incorporation of CO 2 -philic group is an feasible pathway to develop the new efficient ionic liquids. • A series of novel Dual-ionic imidazolium salts are synthesized. • The 98.9% CPC yield could be achieved under 50 °C and 1 bar CO 2 . • A new reaction mechanism is proposed.
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