Effective synthesis of cyclic carbonates from CO2 and epoxides catalyzed by acetylcholine bromide-based deep eutectic solvents. (April 2022)

• Record Type: Journal Article
• Authors: Yang, Xiaoqing; Liu, Zimin; Chen, Peng; Liu, Fei; Zhao, Tianxiang
• Is Part Of: Journal of CO₂ utilization. Volume 58(2022)
• Publication Date: 2022-04
• Subjects: Carbon dioxide -- Deep eutectic solvents -- Acetylcholine bromide -- Cycloaddition reaction -- Cyclic carbonate; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2022.101936
• Languages: English
• ISSNs: 2212-9820

Abstract

Abstract: Fixing CO2 into cyclic carbonates is urgently required under green and eco-friendly conditions. Herein, we synthesized a series of bio-based deep eutectic solvents (DESs) for catalyzing cycloaddition reaction of CO2 with epoxides. Notably, AcChBr-LMA (2:1) formed by acetylcholine bromide (AcChBr) and L -malic acid (LMA) shows the best catalytic activity (up to 98% yield) and excellent recyclability under mild conditions (0.1 MPa CO2 pressure, 80 °C and 2 h). Mechanism studies have shown that there is a synergistic catalytic effect between the hydrogen bond acceptor (HBA) and hydrogen bond donor (HBD). Highlights: Acetylcholine bromide-based DESs are used as efficient catalysts for CO2 conversion. AcChBr-LMA (2:1) can be recycled without significant loss of activity. Mechanistic studies reveal synergistic catalysis to promote cycloaddition of CO2 and epoxides.