Metal- and solvent-free synthesis of cyclic carbonates from epoxides and CO2 in the presence of graphite oxide and ionic liquid under mild conditions: A kinetic study
Metal- and solvent-free synthesis of cyclic carbonates from epoxides and CO2 in the presence of graphite oxide and ionic liquid under mild conditions: A kinetic study
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在氧化石墨和离子液体存在下，在温和条件下，由环氧化物和 CO2 无金属和溶剂合成环状碳酸酯：动力学研究
DOI：
10.1016/j.carbon.2014.10.004
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发表时间：
2015
期刊：
影响因子：
10.9
通讯作者：
Ji Hongbing
中科院分区：
文献类型：
--
作者：
Luo Rongchang;Zhou Xiantai;Fang Yanxiong;Ji Hongbing
研究了氧化石墨（GO）存在下，咪唑类离子液体（IL）催化二氧化碳（CO2）与氧化苯乙烯（SO）环加成反应生成苯乙烯环状碳酸酯（SC）的反应。结果表明，GO中的Brønsted酸性基团和离子液体中的卤素阴离子在促进反应中表现出良好的协同效应. GO上含氧官能团的存在显著增强了催化剂体系的活性。GO重复使用5次后，SC收率没有明显下降，表明该催化剂体系高效稳定。此外，还用原位红外光谱研究了反应的动力学和机理。
The cycloaddition reaction of carbon dioxide (CO2) with styrene oxide (SO) to produce styrene cyclic carbonate (SC) catalyzed by various imidazolium-based ionic liquids (ILs) in the presence of graphite oxide (GO) was studied under relatively mild conditions. It was revealed that the inherent Brønsted acidic groups of the GO and halide anion of ILs exhibited an excellent synergistic effect in promoting the reaction. The presence of oxygen-containing functionalities on GO significantly enhanced the activity of the catalyst system. Furthermore, the decrease of the yield of SC was not noticeable after GO was reused five times, indicating that the catalyst system was highly efficient and stable. Moreover, the kinetics and mechanism of the reaction were also investigatedviain situ infrared spectroscopy.