摘要
用两步法合成离子液体(emim)BF4,以莫尔法测定N-甲基咪唑的转化率.在第一步季铵化反应过程中,不加热不添加任何有机溶剂,可获得高达96.5%的转化率;在第二步离子交换反应中,不加溶剂反应照样进行,转化率可达85.1%.在无惰性气体保护下,合成的产物(emim)BF4为无色透明(或略带黄色)的液体,红外吸收光谱分析未发现杂质吸收峰.结果表明,在简单条件下能得到较高的生产率.
Room temperature ionic liquids （IL） of （emim）BF4 was synthesized from N-methylimidazole by two steps： quaternization and ion metathesis. The conversion ratio was determined by Mohr method. It is found that, in the first step the conversion can be as high as 96.5% without heating and solvent in the reaction. In the second step, ion metathesis goes along well and a conversion as high as 85.1% can be obtained without solvent. Without the protection of inert atmosphere in synthesis, the received products （emim）BF4 are colorless （or yellowy） liquid at room temperature. IR absorption spectra analysis confirmed no impurity peaks were found. Results show that IL derived from imidazole can be synthesized with a high conversion in a simple condition without solvent, heating or inert atmosphere protection.
出处
《深圳大学学报（理工版）》
EI
CAS
北大核心
2007年第4期414-417,共4页
Journal of Shenzhen University(Science and Engineering)
基金
深圳市科技计划资助项目(200504)
