离子液体[Bmim]Br和[Bmim]PF_6的合成及其物化性质研究  

Synthesis and Physicochemical Properties of Ionic Liquids [Bmim]Br and [Bmim]PF_6

作　　者：张楠[1] 邓天龙[1] 刘明明[1] 高道林[1] 

机构地区：[1]天津市海洋资源与化学重点实验室,天津科技大学海洋科学与工程学院,天津300457

出　　处：《天津科技大学学报》2014年第5期42-47,共6页Journal of Tianjin University of Science & Technology

基　　金：国家自然科学基金资助项目(21276194)

摘　　要：采用超声波辅助法合成离子液体1-丁基-3-甲基咪唑溴盐（[Bmim]Br）和1-丁基-3-甲基咪唑六氟磷酸盐（[Bmim]PF6），研究了超声处理时间、超声频率和原料物质的量比对[Bmim]Br 产率的影响，以及超声处理时间、超声频率和溶剂与[Bmim]Br 的质量比对[Bmim]PF6产率的影响．结果表明：超声处理时间、超声频率、原料溴代正丁烷与 N-甲基咪唑物质的量比分别为50,min、20,Hz、1.1时，[Bmim]Br 产率可达到98.88%；在超声处理时间、超声频率、溶剂与[Bmim]Br的质量比分别为50,min、20,Hz和1.5时，[Bmim]PF6产率可达到86.54%．采用红外光谱、紫外吸收光谱和核磁共振氢谱对[Bmim]Br 进行结构表征，同时采用对比法，利用红外光谱、紫外吸收光谱对[Bmim]PF6进行表征，并分别测定了[Bmim]Br和[Bmim]PF6的含水量及其在10～30,℃下的密度和折光率与温度的关系．Ionic liquids 1-butyl-3-methylimidazolium bromide（[Bmim]Br）and 1-butyl-3-methylimidazolium hexafluoro-phosphate（[Bmim]PF6）were synthesized by using ultrasonic-assisted method. The factors affecting the productivity of [Bmim]Br including reaction time,frequency,the mole ratio of reactants as well as the productivity of [Bmim]PF6,including reacting time and mass ratio of solvent to [Bmim]Br were systematically investigated. The results show that the yield of [Bmim]Br was 98.88% under the optimal synthetic conditions of reaction time of 50,min,frequency 20,Hz and mole ratio 1.1,and the yield of [Bmim]PF6,was 86.54% with reaction time of 50,min,frequency 20,Hz and mass ratio of solvent to [Bmim]Br 1.5. In addition,the structure of [Bmim]Br was characterized by infrared spectra,UV absorption spectra,and NMR spectra;[Bmim]PF6,was characterized by infrared spectra and UV absorption spectra with antithesis. The contents of water and its corresponding physicochemical properties including density and refractive index between 10,℃and 30,℃were also measured.

关 键 词：超声波 离子液体 1-丁基-3-甲基咪唑六氟磷酸盐 密度 折光率 

分 类 号：TQ252.3[化学工程—有机化工]