The ionic parachor and predicting properties of amino acid ionic liquid homologues of 1-alkyl-3-methylimidazolium glycine

作     者：TONG Jing HONG Mei WANG PanPan GUAN Wei FANG DaWei YANG JiaZhen 

作者机构：Key Laboratory qf Green Synthesis and Preparative Chemistry of Advanced MaterialsLiaoning UniversityShenyang 110036China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2012年第55卷第7期

页      面：1330-1337页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation ofChina (20903053) the Education Bureau of Liaoning Province(LS2010069) Liaoning University Research Funding 

主　　题：ionic liquids ionic parachor glycine density surface tension extrathermodynamic assumption 

摘      要：The amino acid ionic liquids （AAILs） [C3mim][Gly] （1-propyl-3-methylimidazolium glycine） and [C4mim][Gly] （l-butyl-3- methylimidazolium glycine） have been prepared by the neutralization method and characterized by IH NMR spectroscopy and differential scanning calorimetry （DSC）. The values of their density, surface tension and refractive index were measured at （298.15 ± 0.05） K. Since the AAILs can form strong hydrogen bonds with water, small amounts of water are difficult to remove from the AAILs by common methods. In order to eliminate the effect of the impurity water, the standard addition method （SAM） was applied to these measurements. A new concept which is called the ionic parachor has been put forward. The [Cn mim]＋ cations were treated as a group of reference ions and the individual values of their ionic parachor were evaluated in terms of an extrathermodynamic assumption. Then, using the values of the ionic parachor of reference ions, the parachor, surface tension y and refractive index no of the ionic liquids investigated in this work were estimated. The estimated values correlate quite well with the corresponding experimental values.