INVESTIGATION OF THERMAL AND ANALYTICAL PROPERTIES OF 2 NEMATIC LIQUID-CRYSTALS BY GAS-CHROMATOGRAPHY

被引：26

作者：

BERDAGUE, P

PEREZ, F

COURTIEU, J

BAYLE, JP

ABDELHADI, O

GUERMOUCHE, S

GUERMOUCHE, MH

机构：

[1] UNIV PARIS 11,INST CHIM MOLEC ORSAY,CHIM ORGAN STRUCT LAB,CNRS,URA NA1384,F-91405 ORSAY,FRANCE

[2] UNIV SCI & TECHNOL HOUARI BOUMEDIENNE,INST CHIM,BAB EZZOUAR,ALGERIA

来源：

CHROMATOGRAPHIA | 1995年 / 40卷 / 9-10期

关键词：

GAS CHROMATOGRAPHY; LIQUID CRYSTALS; INTERNAL AND EXTERNAL NO2 COMPOUNDS; TRANSITION TEMPERATURE; ANALYTICAL PROPERTIES;

D O I：

10.1007/BF02290272

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Thermal and analytical properties of two liquid crystals containing internal [2-nitro, 3-methyl 4-(4-heptylbenzoyloxy) 4'-methylazobenzene] and external NO2[2-3-dimethyl 4-(4-heptylbenzoyloxy) 4'-nitro-azobenzene] have been investigated by gas chromatography. Transitions temperatures are determined by inverse gas chromatography using standard columns. Good agreement with values determined by differential scanning calorimetry are found. Analytical capabilities of the two liquid crystals are shown in glass capillary columns. Compared to examples in the literature, the crystals used separated different kinds of solutes. In addition, high molecular mass solutes were eluted at relatively low temperatures. Typical separations are observed for hydrocarbon positional isomers, aromatic hydrocarbons, geometric isomers, and volatile aroma compounds. Comparison between the performance of internal and external, NO2-liquid crystals is made.

引用

页码：581 / 586

页数：6

共 30 条

[1] USE OF A LIQUID-CRYSTAL STATIONARY PHASE AT TEMPERATURES BELOW ITS MELTING-POINT FOR THE GAS-CHROMATOGRAPHIC STUDY OF SOME VOLATILE OIL CONSTITUENTS [J].