离子液体[C_6mim]PF_6的微波辅助合成及光谱表征

Synthesis Using Microwave and Spectroscopic Characterization of N,N'-dialklimidazolium-based Ionic Liquids

在微波辐射下,1-甲基咪唑与1-溴己烷通过季铵化反应,合成[C6mim]Br,通过正交实验设计,得到了最佳工艺条件,即1-甲基咪唑与1-溴己烷的摩尔比为1∶1.1,温度70℃,反应时间10 min,产率可达97%。进一步与HPF6反应,可制得离子液体[C6mim]PF6,产率70%。并对其结构用核磁共振氢谱,红外光谱和紫外光谱进行了表征。

By microwave radiating, the intermediate compounds of imidazolium ionic liquids： [ C6mim ] were synthe- sized. The optimal conditions were obtained by the crossed experiments i. e. , 1 - methylimidazole/organic halid 1 ＂ 1.1, temperature 70 ℃, and time 10 min. It reacted separately with HPF6 at room temperature to get [ C6mim] PF6, and it＇s structures were characterized and analyzed by UV, IR and H＇ NMR spectroscopy.