Synthesis and characterization of new thermotropic liquid crystals derived from 4-hydroxybenzaldehyde
A homologous series of aromatic esters, 4-nalkanoyloxybenzylidene- 4'-bromoanilines, nABBA, consisting of two 1,4-disubstituted phenyl cores and a Schiff base central linkage was synthesized. All the members can be differed by the number of carbon atoms at terminal alkanoyloxy chain (C nH 2n-1C...
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| Main Authors: | , , , , |
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| Format: | Article |
| Published: |
World Academy of Science Engineering and Technology
2011
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/29418/ https://publications.waset.org/15374/synthesis-and-characterization-of-new-thermotropic-liquid-crystals-derived-from-4-hydroxybenzaldehyde |
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| Summary: | A homologous series of aromatic esters, 4-nalkanoyloxybenzylidene- 4'-bromoanilines, nABBA, consisting of two 1,4-disubstituted phenyl cores and a Schiff base central linkage was synthesized. All the members can be differed by the number of carbon atoms at terminal alkanoyloxy chain (C nH 2n-1COO-, n = 2, 6, 18). The molecular structure of nABBA was confirmed with infrared spectroscopy, nuclear magnetic resonance (NMR) spectroscopy and electron-ionization mass (EI-MS) spectrometry. Mesomorphic properties were studied using differential scanning calorimetry and polarizing optical microscopy. |
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