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Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages

หน่วยงาน Universiti Sains Malaysia, Malaysia

รายละเอียด

ชื่อเรื่อง : Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages
นักวิจัย : Sastry, S. Sreehari , Lim, Chery Yong Wei , Ha, Sie Tiong , Yeap, Guan Yeow
คำค้น : QD1-999 Chemistry
หน่วยงาน : Universiti Sains Malaysia, Malaysia
ผู้ร่วมงาน : -
ปีพิมพ์ : 2560
อ้างอิง : 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 , http://eprints.usm.my/37239/1/%28Synthesis_and_mesomorphic_properties%29_1-s2.0-S1658365515001879-main.pdf
ที่มา : -
ความเชี่ยวชาญ : -
ความสัมพันธ์ : http://eprints.usm.my/37239/ , https://doi.org/10.1016/j.jtusci.2015.12.004
ขอบเขตของเนื้อหา : -
บทคัดย่อ/คำอธิบาย :

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.

บรรณานุกรม :
Sastry, S. Sreehari , Lim, Chery Yong Wei , Ha, Sie Tiong , Yeap, Guan Yeow . (2560). Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages.
    กรุงเทพมหานคร : Universiti Sains Malaysia, Malaysia.
Sastry, S. Sreehari , Lim, Chery Yong Wei , Ha, Sie Tiong , Yeap, Guan Yeow . 2560. "Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages".
    กรุงเทพมหานคร : Universiti Sains Malaysia, Malaysia.
Sastry, S. Sreehari , Lim, Chery Yong Wei , Ha, Sie Tiong , Yeap, Guan Yeow . "Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages."
    กรุงเทพมหานคร : Universiti Sains Malaysia, Malaysia, 2560. Print.
Sastry, S. Sreehari , Lim, Chery Yong Wei , Ha, Sie Tiong , Yeap, Guan Yeow . Synthesis and mesomorphic properties of new heterocyclic liquidcrystals with Central Ester–Chalcone linkages. กรุงเทพมหานคร : Universiti Sains Malaysia, Malaysia; 2560.