微波辐射下离子液体[RMIm]PF6（R=P，B，C6）的合成及其电导率研究

在微波辐射下，1-甲基咪唑分别与有机卤盐（1-溴丙烷，溴代正丁烷，1-溴己烷）在80℃回流加热10min，可制得咪唑类离子液体的中间体溴代1-丁基-3-甲基咪唑（BMIm]Br），溴代1-丙基-3-甲基咪唑（PMIm]Br），溴代1-己基-3-甲基咪唑（C6MIm]Br），进一步与HPF6在室温搅拌反应4h，制得憎水性的咪唑类离子液体BMIm]PF6，PMIm]PF6，C6MIm]PF6。对这3种离子液体及其在不同有机溶剂丙酮、甲醇、乙酸乙酯中的电导率的进行测定，发现离子液体的电导率受咪唑上取代基种类、溶剂种类、浓度和温度的影响，取代基的链越长，体积越大，离子液体的电导率越小？并且随温度升高和浓度的增大，离子液体的电导率也增大。

Synthesis of [RMIm]PF_6(R=P,B,C_6)Ionic Liquid under Microwave Irradiation and Research of Its Conductivity

By microwave irradiating, imidazolium ionic liquids intermediate： 1-Butyl-3-methylimidazo- lium bromize （ BMIm] Br） , 1-propyl-3-methylimidaz- olium bromize （ PMIm] Br） , 1- hexyl-3-methylimi- dazolium bromize （ C6MIm] Br） were synthesized from 1-methylimidazole and organic halid （1-bromopro- pane, 1-bromobutane, 1-bromohexane） separately under refux heating at 80℃. Each of them reacted separately with HPF6 for 4 hours at room temperature to get hydrophobic imidazolium ionic liquids： 1-Butyl-3-methyl-imidazolium hexafluorophosphate （ BMIm] PF6, 1-propyl-3-methyl-imidazolium hex-afluorophosphate （ PMIm] PF6）, 1-Hexane-3-methyl-imidazolium hexafluorophosphate （ C6MIm] PF6） . By measuring the conductivityies of these Ionic liquids and them in the different solvents, such as acetone, carbinol and acetic acid second ester, it was found that the conductivity was affected by the kinds of solvents, temperature, concentration and substituent in imidazole. The longer the chain of the substituent, the bigger the bulk, the smaller the conductivity of the ionic liquid. The higher the temperature or the stronger the concentration, the bigger the conductivity.