Citation: MA Hao, ZHAO Xue, LI Kunlan, SHAO Guolin, AN Qingda, YANG Liyu, WEI Ligang. Evaluation of Silane Imidazolium Bis(trifluoromethane)sulfonimide Ionic Liquid Stationary Phase for Gas Chromatography[J]. Chinese Journal of Applied Chemistry, ;2020, 37(4): 447-454. doi: 10.11944/j.issn.1000-0518.2020.04.190231 shu

Evaluation of Silane Imidazolium Bis(trifluoromethane)sulfonimide Ionic Liquid Stationary Phase for Gas Chromatography

MA Hao ^a ,
ZHAO Xue ^b ,
LI Kunlan ^a ,
SHAO Guolin ^a ,
AN Qingda ^a,, ,
YANG Liyu ^a ,
WEI Ligang ^a,,

a.
School of Light Industry & Chemical Engineering, Dalian Polytechnic University, Dalian, Liaoning 116034, China
b.
Dalian Zhonghuida Scientific Instrument Co. Ltd., Dalian, Liaoning 116023, China

Corresponding author: AN Qingda, anqingda@dlpu.edu.cn WEI Ligang, wei_ligang@hotmail.com
Received Date: 2 September 2019
Revised Date: 17 January 2020
Accepted Date: 27 February 2020

Fund Project: the National Natural Science Foundation of China 21776026Supported by the National Natural Science Foundation of China(No.21776026)

Figures(4)

Silane imidazolium ionic liquids (ILs) with different alkyl substituted groups (C1, C2 and C4) on the cations and bis(trifluoromethane)sulfonimide ions ([NTf₂]^-) as the anions were synthesized as the stationary phase for packed column gas chromatography. The silane-based imidazolium ILs are strong polar stationary phases. The cation structure influences the thermal stability, polarity and separation properties. The separation behavior of 1-butyl-3-[(3-trimethoxysilyl)-propyl]imidazolium bis(trifluoromethane)sulfonimide ([PBIM] NTf₂) is better than that of other IL stationary phases. The [PBIM] NTf₂ stationary phase was further evaluated using solvation parameter model. The interaction mechanism between stationary phase and components as well as separation properties of [PBIM] NTf₂ column for different chemical compounds were investigated. The results indicate that hydrogen-bond basicity and dipole-dipole interactions as the main intermolecular forces exist between [PBIM] NTf₂ and components. The stationary phase shows a good selectivity for the components such as Grob test mixture, alkanes, alcohols, esters and amines.
- ionic liquid,
- silane,
- gas chromatography,
- stationary phase
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