Synthesis and Characterization of Novel Bronsted-Lewis Acidic Ionic Liquids  

作　　者：Hualiang An Lijuan Kang Wei Gao Xinqiang Zhao Yanji Wang 

机构地区：[1]Hebei Provincial Key Lab of Green Chemical Technology and High Efficient Energy Saving,Hebei University of Technology,Tianjin,China

出　　处：《Green and Sustainable Chemistry》2013年第2期32-37,共6页绿色与可持续化学（英文）

基　　金：the Special Program of National Basic Research Program of China(973 Program)(Grant 2010CB234602);National Natural Science Foundation of China(Grant 21076059);the Natural Science Foundation of Tianjin City(Grant 12JCYBJC12800);the Key Basic Program of Applied Basic Research Plan of Hebei Province(Grant 12965642D).

摘　　要：To meet the demands of some kinds of reactions catalyzed simultaneously by Br?nsted acid and Lewis acid catalyst, two novel Br?nsted-Lewis acidic ionic liquids, 1-carboxyethylene-3-(4-zinc acetate sulfobutyl) imidazolium chloride ([CH3COO-Zn-O3S-bim-CH2CH2COOH]Cl) and 1-(1,2-dicarboxy) ethylene-3-(4-zinc acetate sulfobutyl) imidazolium chloride ([CH3COO-Zn-O3S-bim-C4H5O4]Cl) were synthesized, in which both Br?nsted and Lewis acidic sites existed in the cation. The structures of the ionic liquids were determined by means of FT-IR, 1H NMR and elemental analysis. The results of Py-IR analysis indicated that the two novel ionic liquids have both Br?nsted and Lewis acid properties. The acid strength values (H0) of the ionic liquids were measured utilizing the UV-visible spectroscopy combined with Hammett indicator method, and the acid amount of them was determined by acid-base titration.To meet the demands of some kinds of reactions catalyzed simultaneously by Br?nsted acid and Lewis acid catalyst, two novel Br?nsted-Lewis acidic ionic liquids, 1-carboxyethylene-3-(4-zinc acetate sulfobutyl) imidazolium chloride ([CH3COO-Zn-O3S-bim-CH2CH2COOH]Cl) and 1-(1,2-dicarboxy) ethylene-3-(4-zinc acetate sulfobutyl) imidazolium chloride ([CH3COO-Zn-O3S-bim-C4H5O4]Cl) were synthesized, in which both Br?nsted and Lewis acidic sites existed in the cation. The structures of the ionic liquids were determined by means of FT-IR, 1H NMR and elemental analysis. The results of Py-IR analysis indicated that the two novel ionic liquids have both Br?nsted and Lewis acid properties. The acid strength values (H0) of the ionic liquids were measured utilizing the UV-visible spectroscopy combined with Hammett indicator method, and the acid amount of them was determined by acid-base titration.

关 键 词：Bronsted-Lewis Acidic Ionic Liquids SYNTHESIS CHARACTERIZATION 

分 类 号：O6[理学—化学]