DOI: 10.1016/j.jcou.2016.12.010
Scopus记录号: 2-s2.0-85007605914
论文题名: Novel isothiouronium ionic liquid as efficient catalysts for the synthesis of cyclic carbonates from CO2 and epoxides
作者: Dai W. ; Yang W. ; Zhang Y. ; Wang D. ; Luo X. ; Tu X.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 17 语种: 英语
英文关键词: Carbon dioxide
; Cyclic carbonate
; Epoxide
; Isothiouronium ionic liquid
Scopus关键词: Carbon
; Carbonates
; Carbonation
; Catalyst activity
; Catalyst selectivity
; Catalysts
; Hydrogen bonds
; Ionic liquids
; Liquids
; Negative ions
; Carboxyl-functionalized
; Catalytic mechanisms
; Catalytic performance
; Cyclic carbonates
; Epoxide
; Nucleophilic attack
; Ring opening of epoxide
; Synthesis of cyclic carbonates
; Carbon dioxide
英文摘要: Graphical abstract: A series of easily prepared functional isothiouronium ionic liquids (FITILs) was synthesized and employed as efficient catalysts for the synthesis of cyclic carbonates from CO2 and epoxides without any co-solvent and co-catalyst. Notably, almost quantitative yield together with 100% of selectivity of cyclic carbonate were attained with using hydroxyl- and carboxyl-functionalized isothiouronium ILs as the catalysts at 140°C and 2.0MPa for 2h. The effects of catalyst structure and various reaction parameters on the catalytic performance were investigated in detail. It was found that the synergistic effect of polarization induced by hydrogen bonding and nucleophilic attack of halide anion could facilitate the ring-opening of epoxide. In addition, the tertiary N atom of FITILs cation would coordinate with CO2 to afford the carbamate salt as an activated form of CO2. Those structure factors maybe account for the good catalytic activity of FITILs for the synthesis of cyclic carbonate from CO2 and epoxide. A possible catalytic mechanism for the cycloaddition of CO2 to epoxide was also proposed. © 2016 Elsevier Ltd. 资助项目: National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52817
Appears in Collections: 影响、适应和脆弱性