Novel bent-core mesogenic of 4-amino-triazole derivatives: synthesis, characterization and liquid crystalline study
| Autor: | Ivan Hameed R. Tomi, Ali Hussein R. Al-Daraji, Alaa Hussein J. Al-Qaisi, Dhafir T.A. Al-Heetimi, Ziad Hussein J. Al-Qaisi |
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| Rok vydání: | 2016 |
| Předmět: |
010405 organic chemistry
Mesogen Organic Chemistry Triazole Mesophase 02 engineering and technology 021001 nanoscience & nanotechnology Ring (chemistry) 01 natural sciences Biochemistry 0104 chemical sciences Crystal chemistry.chemical_compound Differential scanning calorimetry chemistry Liquid crystal Drug Discovery Polymer chemistry Alkoxy group 0210 nano-technology |
| Zdroj: | Tetrahedron. 72:4390-4399 |
| ISSN: | 0040-4020 |
| DOI: | 10.1016/j.tet.2016.06.013 |
| Popis: | The synthesis, characterization and mesomorphism of twelve new bent-shaped mesogens containing 4-amino-1,2,4-triazole as a central rigid core (II)n are reported. The amino triazole derivatives were characterized by 1H, 13C NMR spectroscopy, FT infrared, elemental analysis and one of them by mass spectrometry. The mesophase behavior was investigated using polarizing optical microscopy (POM) and differential scanning calorimetry (DSC). The homologues with short alkoxy terminal groups (II)a–d do not show any mesomorphic properties and only crystal to isotropic transition was observed by POM, whilst the analogue with the longest alkoxy terminal groups (II)e–l exhibit enantiotropic SmA, B1, B2, B6 and B7 phases with wide mesomorphic temperature ranges. The effect of the triazole ring and the length of the terminal alkoxy chains on the liquid crystals behavior of the compounds were discussed. |
| Databáze: | OpenAIRE |
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