物理化学学报 >> 2006, Vol. 22 >> Issue (06): 747-751.doi: 10.3866/PKU.WHXB20060620

研究简报 上一篇    下一篇

N-酯基取代吡啶功能化离子液体的合成与表征

李雪辉;江燕斌;张磊;李榕   

  1. 华南理工大学化学工程系, 广东省绿色化学产品技术重点实验室 广州 510640; 广东省化学试剂工程技术研究中心, 广州 510280
  • 收稿日期:2005-10-28 修回日期:2005-12-29 发布日期:2006-05-31
  • 通讯作者: 李雪辉 E-mail:cexhli@scut.edu.cn

Synthesis and Characterization of N-ester Appended Pyridine Task-specific Ionic Liquids

LI Xue-Hui;JIANG Yan-Bin;ZHANG Lei;LI Rong   

  1. Department of Chemical Engineering, Guangdong Provincial Laboratory of Green Chemical Technology, South China University of Technology, Guangzhou 510640, P. R. China; Research Center for the Chemical Reagent Engineering and Technology of Guangdong Province, Guangzhou 510280, P. R. China
  • Received:2005-10-28 Revised:2005-12-29 Published:2006-05-31
  • Contact: LI Xue-Hui E-mail:cexhli@scut.edu.cn

摘要: 合成了系列新型N-酯基取代吡啶功能化离子液体, 采用NMR、FTIR、ESI-MS、TG-DSC等表征手段, 对其结构组成和物理性质进行了全面的表征. 结果表明, 阴离子相同的N-酯基功能化离子液体与常规溶剂的相溶性基本相同, 由于酯基的引入, 这类离子液体与乙酸乙酯的相溶性降低. 含有相同阴离子的N-酯基吡啶功能化离子液体的熔点随着取代基碳链的增长逐渐下降, 阴离子为BF4、PF6的功能化离子液体具有较好稳定性, 热分解温度在300 ℃左右. 通过酯基对离子液体阳离子进行功能化, 可以对离子液体的物理、化学性能进行调变.

关键词: 功能化离子液体, 取代酯基, 吡啶, 表征, 相溶性

Abstract: A series of N-ester appended pyridinium task-specific ionic liquids (TSILs) were synthesized and characterized by 1H NMR, 13C NMR, FTIR, ESI-MS, and DSC. Experimental results showed that pyridinium TSILs containing the same anion had the same miscibility with conventional organic solvents. The miscibility between these N-ester appended pyridinium task-specific ionic liquids and ethyl acetate decreased for the grafted ester group. With increasing the carbon number of the appended ester group, the melt point of the pyridinium TSILs containing the same anion decreases. Pyridinium TSILs containing BF4or PF6anion had better thermal stability and the thermal decomposition temperature was as high as 300 ℃. The physical and chemical properties of TSILs could be adjusted by the modification of the cation with the N-ester appended functional group.

Key words: Task-specific ionic liquids, Ester appended, Pyridine, Characterization, Miscibility