A thermodynamic approach to understanding liquid crystal selectivity in gas chromatography

被引：15

作者：

Ammar-Khodja, F

Guermouche, S

Guermouche, MH

Rogalska, E

Rogalski, M

Judeinstein, P

Bayle, JP

机构：

[1] USTHB, Inst Chim, Lab Chromatog, El Alia, Alger, Algeria

[2] Univ Nancy 1, CNRS, UMR 7565, Lab Physicochim Colloides, F-54506 Vandoeuvre Les Nancy, France

[3] Univ Metz, Lab Thermodyam & Anal Chim, F-57045 Metz, France

[4] ICMO, Chim Organ Struct Lab, F-91405 Orsay, France

来源：

CHROMATOGRAPHIA | 2003年 / 57卷 / 3-4期

关键词：

gas chromatography; liquid crystal stationary phases; thermodynamic and surface properties; positional isomers;

D O I：

10.1007/BF02491724

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The thermodynamics of four new liquid crystals were investigated in order to understand their selectivity as stationary phases in gas chromatography In this case study, liquid crystals with a benzoyloxy azobenzene mesogenic core substituted with heptyloxy (C7) and/or dioxyethylene ether (DOE) groups, were used. The chromatographic separations of linalool and citronellal, and of xylene, tetraethylbenzene and cresol isomers, which were achieved with the liquid crystal stationary phases, have been related to the dissolution thermodynamics of the solutes. The results gave us an insight into the mechanism of the molecular recognition involved in the separation processes.

引用

页码：249 / 253

页数：5

共 34 条

[1] Gas chromatographic properties of some liquid crystals containing dioxyethylene ether terminal chains [J].