文献类型：期刊文献

英文题名：Effect of Ionic Composition on Physicochemical Properties of Mono-Ether Functional Ionic Liquids

作者：Zhou, Hancheng[1];Chen, Lifei[1];Wei, Zhuo[1];Lu, Yongjuan[1];Peng, Cheng[1];Zhang, Bin[1];Zhao, Xiaojuan[2];Wu, Lan[1];Wang, Yanbin[1]

第一作者：Zhou, Hancheng

通信作者：Zhou, HC[1];Lu, YJ[1];Wu, L[1]

机构：[1]Northwest Minzu Univ, Key Lab Util Environm Friendly Composite Mat & Bu, Dept Chem Engn, Lanzhou 730000, Gansu, Peoples R China;[2]Gansu Univ Chinese Med, Coll Pharm, Lanzhou 730000, Gansu, Peoples R China

第一机构：Northwest Minzu Univ, Key Lab Util Environm Friendly Composite Mat & Bu, Dept Chem Engn, Lanzhou 730000, Gansu, Peoples R China

通信机构：[1]corresponding author), Northwest Minzu Univ, Key Lab Util Environm Friendly Composite Mat & Bu, Dept Chem Engn, Lanzhou 730000, Gansu, Peoples R China.

年份：2019

卷号：24

期号：17

外文期刊名：MOLECULES

收录：;Scopus(收录号：2-s2.0-85071399625);WOS:【SCI-EXPANDED(收录号:WOS:000488613700092)】；

基金：This research was financially supported by the National Natural Science Foundation of China (Nos. 21203150, 21962016, and 51562033), the Gansu Provincial Council for Science and Technology (144GKCA031), the Fundamental Research Funds for the Central Universities (31920180046), and the Natural Science Foundation of Gansu (1610RJZA071).

语种：英文

外文关键词：functional ionic liquids; ionic conductivity; heat capacity; phase behavior

摘要：Tunable properties prompt the development of different "tailor-made" functional ionic liquids (FILs) for specific tasks. FILs with an ether group are good solvents for many organic compounds and enzymatic reactions. However, ionic composition influences the solubility by affecting the physiochemical properties of these FILs. To address the structure effect, a series of novel FILs with a mono-ether group (ME) based on imidazole were prepared through cationic functionalization and anionic exchange reactions, and characterized by NMR, mass spectroscopy, and Thermogravimetric analysis (TGA). The effect of ionic composition (cationic structure and anions) on density, viscosity, ionic conductivity, electrochemical window, and thermal properties of these ME-FILs were systematically investigated. In general, the viscosity and heat capacity increases with the bigger cationic volume of ME-FILs; in particular, the 2-alkyl substitution of imidazolium enhances the viscosity remarkably, whereas the density and conductivity decrease on the condition of the same [NTf2](-) anion; For these ME-FILs with the same cations, the density follows the order of [NTf2](-) [PF6](-) > [BF4](-). The viscosity follows the order of [PF6](-) > [BF4-]> [NTf2](-). Ion conductivity follows the order of [NTf2](-) [BF4](-) > [PF6](-). It is noted that the dynamic density has a good linear relationship with the temperature, and the slopes are the same for all ME-FILs. Furthermore, these ME-FILs have broad electrochemical windows and glass transition temperatures in addition to a cold crystallization and a melt temperature for ME-FIL7. Therefore, the cationic structure and counter anion affect the physicochemical properties of these ME-FILs together.