| 1-烷基-2,3-二甲基咪唑溴盐的合成及表征 |
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| 引用本文： | 章靖,崔锐博,李万博,祝艳琳,田丹碧. 1-烷基-2,3-二甲基咪唑溴盐的合成及表征[J]. 安徽大学学报(自然科学版), 2008, 32(5) |
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| 作者姓名： | 章靖 崔锐博 李万博 祝艳琳 田丹碧 |
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| 作者单位： | 南京工业大学,理学院,江苏,南京,210009 |
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| 基金项目： | 江苏省高校自然科学基础研究基金 |
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| 摘 要： | 以1,2-二甲基咪唑和溴代烷烃为原料,合成了5种离子液体中间体1-烷基-2,3-二甲基咪唑溴盐.讨论了反应时间、反应温度和原料摩尔比对产物收率的影响,得到最佳的条件是:溴代烷烃与1,2-二甲基咪唑以1.1∶1(摩尔比)的比例,在90℃下反应24 h.产物结构经IR和1H-NMR确证,得出结论:阳离子烷基链长度的增加会使3 100~3 000 cm-1波数范围内谱带减弱,降低离子液体的熔点,而对咪唑环上质子化学位移影响不大.
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| 关 键 词： | 1-烷基-2,3-二甲基咪唑溴盐 离子液体 合成 |
Synthesis and characterization of 1-alkyl-2,3-dimethylimidazolium Bromides |
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| ZHANG Jing,CUI Rui-bo,LI Wan-bo,ZHU Yan-lin,TIAN Dan-bi. Synthesis and characterization of 1-alkyl-2,3-dimethylimidazolium Bromides[J]. Journal of Anhui University(Natural Sciences), 2008, 32(5) |
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| Authors: | ZHANG Jing CUI Rui-bo LI Wan-bo ZHU Yan-lin TIAN Dan-bi |
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| Abstract: | Five ionic liquid intermediates 1-alkyl-2,3-dimethylimidazolium bromides were synthesized from 1,2-dimethylimidazolium and alkyl bromides.The effects of reaction temperature and time and molar ratio of materials were investigated.The optimum conditions were: molar ratio of alkyl bromides and 1,2-dimethylimidazolium was 1.1∶1,temperature was 90 ℃,time was 24 h.Their structures were characterized by IR and 1H-NMR.It was concluded the increase of alkyl chain length of cation would weaken band during 3 100~3 000 cm-1 and decreased melting point of ionic liquids,but had weaker effect on proton chemical shifts of imidazolium ring. |
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| Keywords: | 1-alkyl-2 3-dimethylimidazolium bromides ionic liquids synthesis |
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