Retention behaviors of novel ionic liquid stationary phases and their selectivity for capillary gas chromatography  

作　　者：Kai Lu Wei Liu Mei Ling Qi Ruo Nong Fu 

机构地区：[1]Department of Chemistry, School of Science, Beijing Institute of Technology, Beijing 100081, China [2]Institute of Nutrition & Food Hygiene, Beijing Centers for Disease Control & Prevention, Beijing 100013, China

出　　处：《Chinese Chemical Letters》2010年第12期1475-1478,共4页中国化学快报（英文版）

基　　金：the National Nature Science Foundation of China(No.20675007).

摘　　要：One chloride-terminated ionic liquid（CTIL） and two hydroxyl-terminated ionic liquids（HTILs） were synthesized and used as stationary phases for capillary gas chromatography（CGC）.Molecular interactions of these stationary phases were evaluated by Abraham solvation parameter model,indicating that the CTIL exhibits remarkably strong H-bond basicity and the HTILs possess both H-bond basicity and acidity.The molecular interactions were further confirmed by separation of a complex mixture consisting of ketones,aldehydes,esters,alcohols and aromatic compounds.It was found that the obtained solvation parameters correlate well with the chromatographic performances of the analytes in terms of elution order and resolution.The well correlated relationship between the solvation parameters and the selectivity of the CTIL and HTILs stationary phases is quite helpful in predicting and understanding the retention behaviors of different types of analytes on these stationary phases.One chloride-terminated ionic liquid（CTIL） and two hydroxyl-terminated ionic liquids（HTILs） were synthesized and used as stationary phases for capillary gas chromatography（CGC）.Molecular interactions of these stationary phases were evaluated by Abraham solvation parameter model,indicating that the CTIL exhibits remarkably strong H-bond basicity and the HTILs possess both H-bond basicity and acidity.The molecular interactions were further confirmed by separation of a complex mixture consisting of ketones,aldehydes,esters,alcohols and aromatic compounds.It was found that the obtained solvation parameters correlate well with the chromatographic performances of the analytes in terms of elution order and resolution.The well correlated relationship between the solvation parameters and the selectivity of the CTIL and HTILs stationary phases is quite helpful in predicting and understanding the retention behaviors of different types of analytes on these stationary phases.

关 键 词：Molecular interactions SELECTIVITY Ionic liquids Stationary phases for capillary gas chromatography 

分 类 号：O657.71[理学—分析化学] O646.1[理学—化学]