1,3-二-(3-磺酸基丙基)咪唑离子液体的新合成方法研究

A New Synthesis of 1,3-bis-(3-sulfopropyl) imidazole Ionic Liquid

离子液体以其不易挥发、热稳定性好、应用范围广、可重复使用等优点成为了目前化学研究的热点。本文设计了新型双磺酸型烷基咪唑类离子液体1,3-二-(3-磺酸基丙基)咪唑硫酸氢盐的新合成路线,即以价廉的咪唑为原料,经过成盐、烷基化、离子交换等步骤制得终产品,并用1H-NMR和13C-NMR对其结构进行了确证。该方法原料易得、操作简单、反应条件温和,经反应条件优化后收率可达到58.8%。

Ionic liquid is becoming the hotspot in the research of chemical with advantages of less volatile,good thermal stability,wide application range and reusability,etc.In this letter a new synthetic route of 1,3-bis-（3-sulfonic acid）-propyl-imidazolium hydrogen sulfate was designed with cheap imidazole as the starting material through salifying,alkylation,ion exchange to get the final product.The structure of the ionic liquid was confirmed by1H-NMR and13C-NMR.The new method has advantages of cheap raw materials,easy operation and mild reaction conditions.What＇s more,the yield of the route can reach 58.8% after process optimization.