| Title: | Effect of the chain length on the thermal and analytical properties of laterally biforked nematogens |
| Author(s): | Dahmane M; Athman F; Sebih S; Guermouche MH; Bayle JP; Boudah S; |
| Address: | "Laboratoire de Chromatographie, Faculte de Chimie, Universite des Sciences et de la Technologie Houari Boumediene, B.P. 32, El-Alia, 16111 Bab-Ezzouar, Alger, Algeria" |
| DOI: | 10.1016/j.chroma.2010.08.036 |
| ISSN/ISBN: | 1873-3778 (Electronic) 0021-9673 (Linking) |
| Abstract: | "Three laterally substituted liquid crystals were synthesized in order to investigate the effect of a lateral biforked chain on the thermal and analytical properties. The mesogenic molecules have the same core containing four aromatic rings connected by two ester and one diazo linkages, they differ by the length of one chain within the lateral biforked substituent. The phase transition temperatures were obtained by polarized light microscopy and differential scanning calorimetry (DSC). The clearing temperature and the nematic range decrease with increasing length of the lateral biforked chain. The stationary phases derived from these nematogens provide excellent resolution of various classes of compounds, including aromatic hydrocarbons (AH), substituted benzenes, polycyclic aromatic hydrocarbons (PAH), phenols and volatile organic compounds (VOC) present in the essential oils. The selectivities of the stationary phases were found to decrease according to the length of the side chain" |
| Keywords: | "Benzene Derivatives/chemistry Calorimetry, Differential Scanning Chromatography, Gas/*methods Hydrocarbons, Aromatic/*chemistry Microscopy Models, Molecular Oils, Volatile Phase Transition Phenols/*chemistry Temperature;" |
| Notes: | "MedlineDahmane, Mohamed Athman, Fatiha Sebih, Said Guermouche, Moulay-Hassane Bayle, Jean-Pierre Boudah, Soulimane eng Netherlands 2010/09/11 J Chromatogr A. 2010 Oct 15; 1217(42):6562-8. doi: 10.1016/j.chroma.2010.08.036. Epub 2010 Aug 19" |
