Synthesis of four liquid crystals and study of alkyl chain effect on the nematic range for application in GC |
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| Authors: | A. Tafer M. Benalia M. Djedid H. Bouchareb A. H. Al-dujaili |
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| Affiliation: | 1. Laboratory of Process Engineering, Laghouat University, Laghouat, Algeria;2. King Saud University, Department of Chemistry, Faculty of Sciences, Riyadh, Saudi Arabia |
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| Abstract: | Four liquid crystals (LCs) compounds which contain the 1,3,4-oxadiazole group were synthesized and characterized with spectroscopic techniques (IR, 1H- and 13C NMR), their thermal properties were analyzed by the Differential Scanning Calorimetry (DSC) and the polarizing microscope (POM). A comparative study of the mesomorphic properties of these LCs and three other compounds which have already been used as a stationary phase in gas chromatography (GC) was carried out. These compounds have the same main nucleus. LCs V1, LC1, LC2 and LC3 gave a nematic (N) phase to the heating, LCs V2 and V3 recorded smectic A (SmA) and N phases. However, the range (N) has disappeared in V4. |
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| Keywords: | Chromatography nematic synthesis liquid crystal |
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