咪唑类室温型离子液体的制备

论文编号:SW205  论文字数:9908,页数:22

摘要：离子液体具有呈液态的温度区间大、溶解范围广、没有显著的蒸气压、良好的稳定性、极性较强且酸性可调、电化学窗口大等优点，在电化学、有机合成催化、生物化学领域都有着广泛的应用前景。
 本文研究了以1-甲基咪唑和溴乙烷为原料，合成1-乙基-3-甲基咪唑溴盐。通过反应时间、温度、投料比等一系列选择建立了合成l-乙基-3-甲基咪唑溴盐的最佳工艺，即：反应温度为50℃，反应时间为6h，l-甲基咪唑与溴乙烷的摩尔比为1:1.2，在此条件下，l-乙基-3-甲基咪唑溴盐的收率为92.73%，产品纯度用HPLC分析为97.85%，并采用红外光谱对合成产物进行表征。
 本文还对l-丙基-3-甲基咪唑溴盐和l-丁基-3-甲基咪唑溴盐的制备及表征制备进行了初步研究。
 
关键词：离子液体；l-甲基咪唑；溴乙烷；l-乙基-3-甲基咪唑溴盐

Abstract: Ionic liquids have advantages of large liquid temperature range, wide solution, no significant vapor pressure, good stability, Polar strong acidic and adjustable, electrochemical window big. They have broad application prospects in the fields of electrochemical, catalytic organic synthesis biochemistry.
In this paper, 1-ethyl-3-methylimidazolium bromides were synthesized with raw materials of 1-methylimidazole and ethyl bromide. Establish the technology of synthetic l - ethyl-3-methylimidazolium bromides by choosing a series of reaction times, temperatures, feed ratios, namely: the reaction temperature of 50℃ and the reaction time of 6 h, 1-methylimidazole and ethyl bromide ratio of 1 : 1.2. Under these conditions, l - ethyl-3-methylimidazolium bromide salt yield of 92.73%. purity of the product was determined by analysis of 97.85%, and characterize the products by using infrared spectroscopy.
    It also prepares and characterize l-propyl- 3-methylimidazolium bromide salt, and 1-butyl - 3-methylimidazolium bromide salt as a preliminary study.

Key words：Ionic liquid; 1-Methylimidazole; Eethyl bromide; 1-Ethyl-3-Methylimidazole

目录
中文摘要………………………………………………………………………………………Ⅰ
英文摘要………………………………………………………………………………………Ⅱ
目录 ……………………………………………………………………………………………Ⅲ
1 绪论 …………………………………………………………………………………………1
 1.1前言   ………………………………………………………………………………1
 1.2 文献综述 …………………………………………………………………………2
 1.2.1离子液体研究动态   ……………………………………………………2
 1.2.2离子液体的研究现状……………………………………………………2
 1.2.3离子液体的应用 …………………………………………………………3
 1.2.4 离子液体的合成方法……………………………………………4
 1.2.5 本论文研究的主要内容 ………………………………………………5
2 实验部分  ……………………………………………………………………………………6
    2.1 实验仪器及试剂……………………………………………………………………6
    2.2 产品分析方法………………………………………………………………………6
    2.3 咪唑类离子液体的合成 …………………………………………………………6
      2.4咪唑类离子液体分析 ……………………………………………………………11
 2.4.1 分析条件的建立………………………………………………11
 2.4.2 数据采集及分析………………………………………………12
3 结果与讨论   ………………………………………………………………………………14
 3.1正交试验结果及分析 ……………………………………………………………14
 3.2 实验结果分析  ……………………………………………………………………14
 3.3 验证试验   …………………………………………………………………………14
 3.4结论 …………………………………………………………………………………15
总结与展望……………………………………………………………………………………16
致谢 ……………………………………………………………………………………………17
参考文献………………………………………………………………………………………18