溴化1-乙基-3-甲基咪唑氯化锌离子液体的合成、表征及催化性能

Green Island Synthesis,characterization and catalytic performance of ionic liquid 1-ethyl-3-methylimidazolium bromide chlorozincate

采用溴代乙烷与N-甲基咪唑为原料合成了中间体溴化1-乙基-3甲基咪唑,并与氯化锌反应制备了1-乙基-3-甲基溴化咪唑氯化锌盐。分别经1 HNMR、FT-IR、TG、DSC对离子液体进行了结构表征及热分析。将该离子液体用于尿素醇解合成碳酸二乙酯反应体系,考查了[EMIM][Br][Zn2Cl4]离子液体的催化性能,碳酸二乙酯的收率超过25%。

An ionic liquid（IL）1-Ethyl-3-methylimidazolium bromide chlorozincate（[Zn2Cl4]）was successfully synthesized by the intermediate 1-Ethyl-3-methylimidazolium bromide,which was synthesized by ethyl bromide and N-methyl imidazole.[Zn2Cl4] was characterized with 1HNMR,FT-IR,TG and DSC.[Zn2Cl4] was employed as the catalyst for the synthesis of diethyl carbonate by alcoholysis of urea in order to investigate the catalytic performance,and the yield of diethyl carbonate was over 25%.