Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages
A series of new calamitic liquid crystals, 4-[3-(pyridin-4-yl)prop-2-enoyl]phenyl 4-alkyloxybenzoates, comprising a pyridyl core,ester–chalcone central linkage and terminal alkyloxy chain were synthesized and characterized. This series consists of four membersthat differ by the length of the alkylox...
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| Format: | Article |
| Language: | English |
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Taylor & Francis
2017
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| Online Access: | http://eprints.usm.my/37239/1/%28Synthesis_and_mesomorphic_properties%29_1-s2.0-S1658365515001879-main.pdf |
| _version_ | 1797009788677128192 |
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| author | Lim, Chery Yong Wei Ha, Sie Tiong Yeap, Guan Yeow Sastry, S. Sreehari |
| author_facet | Lim, Chery Yong Wei Ha, Sie Tiong Yeap, Guan Yeow Sastry, S. Sreehari |
| author_sort | Lim, Chery Yong Wei |
| collection | USM |
| description | A series of new calamitic liquid crystals, 4-[3-(pyridin-4-yl)prop-2-enoyl]phenyl 4-alkyloxybenzoates, comprising a pyridyl core,ester–chalcone central linkage and terminal alkyloxy chain were synthesized and characterized. This series consists of four membersthat differ by the length of the alkyloxy chain (CnH2n+1O , where n = 10, 12, 14, 16). The structures of the title compounds wereelucidated using spectroscopic and spectrometric techniques, such as FT-IR, NMR (1H and13C) and EI-MS. The mesomorphicproperties were studied using differential scanning calorimetry and optical polarizing microscopy. The decyloxy-containing com-pound was found to be non-mesogenic, whilst the compounds containing n-dodecyloxy to n-hexadecyloxy chains exhibited anenantiotropic smectic A phase with a fan-shaped texture. From the structure–property relationship study, it was proposed that thenumber of carbons in the alkyloxy chain must be at least 12 (n ≥ 12) to generate the smectic phase in the corresponding substitutedArCOOArCOCH CHC5H4N compounds. |
| first_indexed | 2024-03-06T15:10:34Z |
| format | Article |
| id | usm.eprints-37239 |
| institution | Universiti Sains Malaysia |
| language | English |
| last_indexed | 2024-03-06T15:10:34Z |
| publishDate | 2017 |
| publisher | Taylor & Francis |
| record_format | dspace |
| spelling | usm.eprints-372392019-09-06T09:00:02Z http://eprints.usm.my/37239/ Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages Lim, Chery Yong Wei Ha, Sie Tiong Yeap, Guan Yeow Sastry, S. Sreehari QD1-999 Chemistry A series of new calamitic liquid crystals, 4-[3-(pyridin-4-yl)prop-2-enoyl]phenyl 4-alkyloxybenzoates, comprising a pyridyl core,ester–chalcone central linkage and terminal alkyloxy chain were synthesized and characterized. This series consists of four membersthat differ by the length of the alkyloxy chain (CnH2n+1O , where n = 10, 12, 14, 16). The structures of the title compounds wereelucidated using spectroscopic and spectrometric techniques, such as FT-IR, NMR (1H and13C) and EI-MS. The mesomorphicproperties were studied using differential scanning calorimetry and optical polarizing microscopy. The decyloxy-containing com-pound was found to be non-mesogenic, whilst the compounds containing n-dodecyloxy to n-hexadecyloxy chains exhibited anenantiotropic smectic A phase with a fan-shaped texture. From the structure–property relationship study, it was proposed that thenumber of carbons in the alkyloxy chain must be at least 12 (n ≥ 12) to generate the smectic phase in the corresponding substitutedArCOOArCOCH CHC5H4N compounds. Taylor & Francis 2017-01 Article PeerReviewed application/pdf en http://eprints.usm.my/37239/1/%28Synthesis_and_mesomorphic_properties%29_1-s2.0-S1658365515001879-main.pdf Lim, Chery Yong Wei and Ha, Sie Tiong and Yeap, Guan Yeow and Sastry, S. Sreehari (2017) Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages. Journal of Taibah University for Science, 11 (1). pp. 133-140. ISSN 1658-3655 https://doi.org/10.1016/j.jtusci.2015.12.004 |
| spellingShingle | QD1-999 Chemistry Lim, Chery Yong Wei Ha, Sie Tiong Yeap, Guan Yeow Sastry, S. Sreehari Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages |
| title | Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages |
| title_full | Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages |
| title_fullStr | Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages |
| title_full_unstemmed | Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages |
| title_short | Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages |
| title_sort | synthesis and mesomorphic properties of new heterocyclic liquidcrystals with central ester chalcone linkages |
| topic | QD1-999 Chemistry |
| url | http://eprints.usm.my/37239/1/%28Synthesis_and_mesomorphic_properties%29_1-s2.0-S1658365515001879-main.pdf |
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