LC and GC Study of a New Phenyldiazene Liquid Crystal

A new phenyldiazene liquid crystal α with a methylene group in the ortho position to the diazo linkage was cyclized by heating. Differential scanning calorimetry was used to precisely identify the nature of the liquid crystal in its initial and final states, and the exothermic enthalpy of the cycliz...

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Bibliographic Details
Published in:Chromatographia 2010-08, Vol.72 (3-4), p.343-346
Main Authors: Saïdat, Boubakeur, Guermouche, Moulay Hassan, Bayle, Jean-Pierre
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Chromatographic methods and physical methods associated with chromatography
Chromatography
Column liquid chromatography
differential scanning calorimetry
Exact sciences and technology
Full Short Communication
Gas chromatographic methods
gas chromatography
Kinetics of cyclization
Laboratory Medicine
Liquid crystal
Other chromatographic methods
Pharmacy
Proteomics
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Summary:A new phenyldiazene liquid crystal α with a methylene group in the ortho position to the diazo linkage was cyclized by heating. Differential scanning calorimetry was used to precisely identify the nature of the liquid crystal in its initial and final states, and the exothermic enthalpy of the cyclization. The complete kinetics of cyclization (kinetic order, reaction constants and activation energy) was determined by LC. Gas chromatographic properties of the final compound (β) were determined and showed to have excellent separation capabilities for phenols and polyaromatic compounds.
ISSN:0009-5893
1612-1112
DOI:10.1365/s10337-010-1641-7