Synthesis of new schiff base ester liquid crystals with a benzothiazole core
A series of new calamitic liquid crystals, 6-methoxy-2-(4-alkanoyloxybenzylidenamino)benzothiazoles, comprising a benzothiazole core, terminal methoxy group and a Schiff base linkage were synthesised and characterised. This series comprises 12 members wherein members differ by the length of the alka...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Published: |
Taylor & Francis Group, LLC
2010
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/26652/ http://dx.doi.org/10.1080/02678291003710425 |
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| Institution: | Universiti Teknologi Malaysia |
| Summary: | A series of new calamitic liquid crystals, 6-methoxy-2-(4-alkanoyloxybenzylidenamino)benzothiazoles, comprising a benzothiazole core, terminal methoxy group and a Schiff base linkage were synthesised and characterised. This series comprises 12 members wherein members differ by the length of the alkanoyloxy chain (C n-1H2n-1COO-, where n?=?2–8, 10, 12, 14, 16, 18). Their mesomorphic properties were studied by using differential scanning calorimetry, optical polarising microscopy and powder X-ray diffraction techniques. The short chain derivatives (n?=?2 and 3) were non-mesogenic compounds, while an enantiotropic nematic phase was present throughout the remaining members of the series. The smectic C phase emerged from the decanoyloxy derivative onwards. |
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