烃基咪唑和吡啶鎓氢氧化物碱性离子液体的合成

Synthesis of Alkyl Imidazolium and Pyridinium Hydroxide Basic Ionic Liquids

以KOH或NaOH作碱试剂，考察了溶剂对1-丁基-3-甲基咪唑溴鎓（[bmim]Br）合成1-丁基-3-甲基咪唑锚氢氧化物（[bmim]OH）碱性离子液体的影响，并采用强碱性阴离子交换树脂法合成[bmim]OH。结果表明：在室温下，溶剂10mL，[bmim]Br和KOH的物质的量之比为1：1．1的条件下，以乙醇为溶剂反应2h和以异丙醇为溶剂反应0．5h，[bmim]Br的转化牢分别为96％和98％，[bmim]OH的产率分别为95％和97％，且没有副产物生成；1 mmol[bmim]Br和1．1～1．4g717。强碱性例离子交换树脂，分别以10mL水、甲醇和异丙醇为溶剂，并采用层析牲中静态反应和烧瓶中动态反应方式在室温下反应，反应时间分别为0.25和0．5h，[bmim]Br的转化率达到100％，[bmim]OH的产率为96％以上，且没有副产物生成；717^#强碱性阴离子交换树脂重复使用性能较好，重复使用3次后，反应的转化率和产牢分别达到100％；N96．4％。在同样条件下，利用强碱性阴离子交换树脂法以层析柱中静态反应方式合成1-乙赫-3-甲基咪唑鎓氯氧化物[emim]OH、乙基吡啶黠氢氧化物[epy]OH和丁基吡啶锚氢氧化物[bpy]OH碱杜离子液体，反应转化率为100％，产率为97％以上。

The effects of different solvents on synthesis of base functional ionic liquid l-butyl-3-methyl imidazolium hydroxide（[bmim]OH） from 1-butyl-3-methyl imidazolium bromine （[bmim]Br） using KOH or NaOH as base agent were investigated and strong-base anion exchange resin was used to prepare [bmim]OH. The results showed that under the conditions of room temperature, molar ratio of [bmim]Br to KOH 1： 1.1, solvent 10 mL, the conversion of [bmim]Br and the yield of [bmim]OH could reach 96% and 95%, respectively, when the solvent was alcohol and reaction time was 2 h, while the conversion and the yield could reach 98% and 95%, respectively, when the solvent was isopropanol and reaction time was 0.5 h, and there was no byproduct. The conversion of 100% and the yield of 97% were obtained and there was no byproducts by using 717# strong-base anion exchange resin instead of KOH in column chromatography static reaction for 0.25 h or in flask dynamic reaction after reaction for 0.5 h, respectively, in l0 ml water, methanol and ethanol at room temperature when solvent was 10 mL, [bmim]Br l mmol and resin 1.1-1.4 g. And the conversion of [bmim]Br and yield of [bmim]OH could reach 100% and 96.4% after the 717# strong-base anion exchange resin was used 3 times. Under the same conditions, 1-ethyl-3-methylimidazolium hydroxide （[emim]OH）, ethyl pyridinium hydroxide（[epy]OH）, and butyl pyridinium hydroxide（[bpy]OH） were synthesized using the resin static reaction pattern, and the conversion was 100% and the yield was above 97%.