Stationary Phase for Gas Chromatography on the Basis of a Precursor of Macroheterocycles and a Nematic Liquid Crystal

被引:0
作者
S. A. Kuvshinova
I. V. Novikov
G. V. Kuvshinov
K. M. Litov
V. A. Burmistrov
M. K. Islyaikin
O. I. Koifman
机构
[1] Ivanovo State University of Chemistry and Technology,Krestov Institute of Solution Chemistry
[2] Russian Academy of Sciences,Federal State Budgetary Educational Institution of Higher Education
[3] “Ivanovo State Medical Academy” of the Ministry of Healthcare of the Russian Federation,undefined
来源
Russian Journal of General Chemistry | 2019年 / 89卷
关键词
precursor of macroheterocycles; nematic liquid crystal; stationary phase; gas chromatography; selectivity; sorption;
D O I
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中图分类号
学科分类号
摘要
The stationary phase for gas chromatography on the basis of the chiral R(+)-1′,7′,7′-trimethylbicyclo-[2.2.1]heptano[2′,3′-b]-2,3-dicyanopyrazine (10.4 wt %) and a liquid crystalline 4,4′-dihexyloxyazoxybenzene was studied. The phase transition temperatures of the binary mixture were measured by polarizing microscopy. It was shown that the chiral camphor-substituted 2,3-dicyanopyrazine induces formation of an enantiotropic chiral helically coiled nematic phase in the achiral liquid crystal over a wide temperature range. The gas chromatographic retention times of organic compounds on this sorbents were measured. The structural and chiral selectivity of the stationary phase on the basis of a liquid crystal and camphor-substituted 2,3-dicyanopyrazine was determined. The retention volumes, activity coefficients, and sorption enthalpies and entropies were calculated and analyzed.
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页码:574 / 579
页数:5
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