化工学报 ›› 2011, Vol. 62 ›› Issue (S2): 173-178.DOI: 10.3969/j.issn.0438-1157.2011.z2.032

• 材料化学工程与纳米技术 • 上一篇    下一篇

［EMIM］Br-AlCl3离子液体的合成

张丽鹏1，于先进2，赵增典2，董云会2，王晓铭2，张德超2   

  1. 1万杰集团有限公司;2山东理工大学化学工程学院
  • 收稿日期:2011-12-20 出版日期:2011-12-20 发布日期:2011-12-20
  • 通讯作者: 张丽鹏

Synthesis of ［EMIM］Br-AlCl3 ionic liquid

ZHANG Lipeng1，YU Xianjin2 , ZHAO Zengdian2, DONG Yunhui2, WANG Xiaoming2 , ZHANG Dechao2   

  • Received:2011-12-20 Online:2011-12-20 Published:2011-12-20

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摘要： 采用N-甲基咪唑、溴乙烷、AlCl3常规回流法以及微波法合成离子液体，研究［EMIM］Br中间体的产率；采用量子化学方法计算离子液体结构，明确合成反应的机理；通过紫外光谱和红外光谱表征［EMIM］Br-AlCl3离子液体的结构；测试离子液体的密度、电导率等性质。结果表明：常规回流法以N-甲基咪唑和溴乙烷为原料，在70℃温度下反应5 h，反应产率为87.9%；微波法反应时间1000 s，产率为94.2%；40℃下密度为1.46 g·cm-3，电导率为21 S·m-1；用DFT B3LYP 量子化学计算方法研究离子液体的构型，离子液体的合成反应遵循SN2反应机理；紫外光谱和红外光谱表征了［EMIM］Br和AlCl3/［EMIM］Br离子液体的结构。

关键词: AlCl3/［EMIM］Br离子液体, 合成, 结构

Abstract: The ionic liquid was synthesized by mixing N-EMIM, bromoethane and AlCl3 using common refuxing method as well as microwave method, and the yield of ［EMIM］Br was researched. The structure of ［EMIM］Br was computed by quantum chemistry method to confirm the mechanism of sythetic reaction. The structure of ［EMIM］Br-AlCl3 was confirmed by UV and IR. The density and conductivity was tested as well. The results showed that the yield of ［EMIM］Br was 87.9% by the method of common refluxing 5 h at 70℃, and the yield of microwave method can be achieved 94.2% with 1000 s reaction time. At 40℃, the density was 1.46 g·cm-3, and the conductivity was 21 S·m-1. DFT B3LYP quantum chemical method showed the reaction mechanism, which followed SN2 reaction mechanism.

Key words: AlCl3/［EMIM］Br ionic liquid, synthesis, structure

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