%0 Journal Article %A AN Qingda %A LI Kunlan %A MA Hao %A SHAO Guolin %A WEI Ligang %A YANG Liyu %A ZHAO Xue %T Evaluation of Silane Imidazolium Bis(trifluoromethane)sulfonimide Ionic Liquid Stationary Phase for Gas Chromatography %D 2020 %R 10.11944/j.issn.1000-0518.2020.04.190231 %J Chinese Journal of Applied Chemistry %P 447-454 %V 37 %N 4 %X

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.

%U http://yyhx.ciac.jl.cn/EN/10.11944/j.issn.1000-0518.2020.04.190231