胺基咪唑功能离子液体［ NH2 e-mim ］［ BF4］的合成与制备

胺基咪唑功能离子液体在固定CO2方面具有独特的优势，但其合成制备步骤复杂，产率低，成本高等局限了它的广泛应用。采用两步合成法合成了1-（1-胺乙基）-3-甲基咪唑氟硼酸盐（ NH2 e-mim] BF4]），通过核磁共振和红外光谱进行结构表征，并测定了其纯度及密度、黏度、表面张力、电导率等物理化学性质。实验表明：离子液体（简称IL）合成最佳工艺条件是原料配比n（3-溴丙胺氢溴酸盐）/n（ N-甲基咪唑）＝1．1，以乙醇为溶剂，在343 K下反应24 h，减压蒸馏提纯；合成物胺的含量均在0．9355 mol NH2/mol IL以上，纯度较高；红外光谱法和核磁共振氢谱分析表明合成了目标产物，298 K下合成的产物的物化性质与文献报道的相近。

Synthesis and preparation of [NH2 e-mim][BF4]

Fixation of CO2 using task-specific ionic liquids have some unique advantages , but synthesis factors such as complex preparation, low yield, high cost and so on limit its applications.In that thesis, NH2e-mim]BF4] was synthesized , and its structure was characterized by FTIR and H-NMR, then the products ’ purity and physico-chemical properties were tested, including density, viscosity, surface tension, electrical conductivity, etc.It showed that it would obtain better synthetics when n C2H6BrN＆#183; HBr/nC4H6N2 was 1.1 with ethanol as solvent , reaction 24 h at 343 k and purification by vacuum distillation .Amine content of compound was above 0.9355 mol NH2/mol IL, and it had high purity .FTIR and H-NMR structure characterization analysis showed that the target product was synthesized successfully .Physicochemical properties of synthetic products were similar to reported in literatures .