摘要
采用绿色化学合成法,以N-丁基咪唑和1,2-二甲基咪唑为反应原料,碳酸酯为烷基化试剂,合成了2种离子液体的中间体1-丁基-3-甲基咪唑碳酸甲酯盐([n-BMIM]OCO2Me)和1,2-二甲基-3-乙基咪唑碳酸乙酯盐([EMMIM]OCO2Et),然后通过与HBF4及HPF6的反应,得到产率高、稳定性好的4种离子液体:1-丁基-3-甲基咪唑四氟硼酸盐([n-BMIM]BF4)、1-丁基-3-甲基咪唑六氟磷酸盐([n-BMIM]PF6)、1,2-二甲基-3-乙基咪唑四氟硼酸盐([EMMIM]BF4)和1,2-二甲基-3-乙基咪唑六氟磷酸盐([EMMIM]PF6).产物结构和结晶温度或熔点皆已确认.
The alkyl imidazolium-based ionic liquids,1-n-butyl-3-methylimidazole methyl carbonate([n-BMIM]OCO2Me) and 1,2-dimethyl-3-ethylimidazole ethyl carbonate(OCO2Et),were synthesized from N-methylimidazole,1,2-dimethylimidazole and carbonates.Reacting with HBF4 and HPF6 at room temperature,[n-BMIM]OCO2Me and OCO2Et were converted into four ionic liquids: 1-n-butyl-3-methylimidazolium tetrafluoroborate([n-BMIM]BF4),1-n-butyl-3-methylimidazolium hexafluorophosphate([n-BMIM]PF6),1,2-dimethyl-3-ethylimidazolium tetrafluoroborate(BF4),and 1,2-dimethyl-3-ethylimidazolium hexafluorophosphate(PF6).The six ionic liquids were characterized and analysed.Environmental pollution was avoided by the green chemical synthetic method in comparison with the traditional two-step synthesis.
出处
《华南师范大学学报(自然科学版)》
CAS
北大核心
2012年第1期82-85,共4页
Journal of South China Normal University(Natural Science Edition)
基金
联塑产学研基金
广东高校高分子新型材料产学研结合示范(暨研究生创新培养)基地项目(cgzhzd1007)
关键词
离子液体
碳酸酯
合成
表征
ionic liquids
carbonates
synthesis
characterization