摘要
运用常规两步法和微波法制备了离子液体1-丁基-3-甲基咪唑四氟硼酸盐([bmim]BF4)以及1-羟乙基-3-甲基咪唑四氟硼酸盐([C2OHmim]BF4),并通过红外光谱表征以及密度和溶解度等物理性质的检测,对两种制备方法进行了比较。实验结果表明,不需使用任何溶剂,选择N-甲基咪唑和溴代正丁烷(2-氯乙醇)的配比为1∶1.1,[bmim]Br([C2OHmim]Cl)和NaBF4的配比为1∶1,在微波炉功率为350 W的条件下反应,[bmim]BF4和[C2OHmim]BF4的产率分别达70.0%和76.9%。反应采取微波间歇加热的方式,方法简单高效、无溶剂污染,但产率偏低,其制备条件还需进一步研究与完善。
1-Butyl-3-methylimidazolium tetrafluoroborate（ [ bmim] BF4 ） and 1 -ethoxyl-3-methyl imidazolium tetrafluoroborate （[ C2OHmim] BF4） were prepared through conventional and microwave two-step method which were also compared by IR spectra characterization and detection of physical properties such as density and conductivity. The experimental results showed that, with solvent-free and intermittent microwave heating where the power was 350 W, when the mole ratio of l-methylimidazole and 1-bromobutane （2-chloroethane） was 1 ： 1.1 ,the mole ratio of [ bmim] Br（ [ C2OHmim] Cl） and sodium tetrafluoroborate was 1：1, the yield of [ bmim ] BF4 and [ C2OHmim]BF4 was 70.0% and 76.9% respectively, the microwave method is simple and high-efficient without contamination of solvents, but its yield is low. So preparation conditions of microwave-assisted synthesis still need researching and improving further.
出处
《应用化工》
CAS
CSCD
2009年第1期58-60,共3页
Applied Chemical Industry
关键词
离子液体
微波合成
咪唑
ionic liquid
microwave-assisted synthesis
imidazole
