Liquid crystal stationary phases for chromatography

Liquid purification or separation – With means to add treating material – Chromatography

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2105021, 210635, 210656, 95 88, 96101, B01D 1508

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active

059001453

ABSTRACT:
The present invention relates to liquid crystalline alkenes and liquid crystalline polysiloxanes prepared from these alkenes. More precisely, the present invention is related to the development of fused ring aromatic-containing side chain liquid crystal polysiloxanes (SCLCP). These liquids crystalline polysiloxanes are particularly useful as the stationary phase in column chromatography for the separation of various isomeric compounds, including polychlorinated dibenzo-p-dioxins (PCDD), polychlorinated diberizofurans (PCDF), polycyclic aromatic hydrocarbons (PAH), polychlorinated biphenyls (PCB) and polysubstituted benzenes.

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Jones, B.A. et al., "Synthesis of Smectic Liquid-Crystalline Polysiloxanes from Biphenylcarboxlate Esters and Their Use as Stationary Phases for High-Resolution Gas Chromatography," J. Org. Chem. 49:4947-4951 (1984).
Markides, K.E. et al., "Smectric Biphenylcarboxlate Ester Liquid Crystalline Polysiloxane Stationary Phase for Capillary Gas Chromatography," Anal. Chem. 57:1296-1299 (1985).
Naikwadi, K.P. et al., "Liquid Crystals II. Applications of Liquid crystals as stationary phases in gas-liquid chromatography," J. Chromatogr. 206:361-367 (1981).
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