Chinese Journal of Applied Chemistry

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α-Cyanostilbene Derivatives as Fluorescence Liquid-Crystal Molecules: Synthesis and Optical Properties

DING Aixiang1, ZHANG Guiyu2, LU Hongbo2, YANG Jiaxiang1,2*   

  1. (1.Department of Chemistry,Key Laboratory of Functional Inorganic Materials of Anhui Province,Anhui University,Hefei 230039,China;
    2.Key Lab of Special Display Technology,Ministry of Education,National Engineering
    Laboratory of Special Display Technology,State Key Laboratory of Advanced Display Technology,
    Academy of Opto-Electronic Technology,Hefei University of Technology,Hefei 230009,China)
  • Received:2014-03-10 Revised:2014-04-24 Published:2014-10-09 Online:2014-10-09
  • Contact: xiang jiayang

Abstract: Liquid-crystal molecule with α-cyanostilbene as the core structure, (Z)-2-(4-(dodecylamino)phenyl)-3-(4-(dodecyloxy)phenyl)acrylonitrile(T3), was synthesized. Compound T3 and its analogue (Z)-2-(4-aminophenyl)-3-(4-(dodecyloxy)phenyl)-acrylonitrile(T2) exhibit strong fluorescence both in concentrated solutions and in solid state at blue-green bands. Thermogravimetric analysis for both compounds demonstrates the good thermal stability. Differential scanning calorimetry(DSC) and polarising optical microscope(POM) were used to study the liquid crystal property of compound T3. Molecular arrangement of compound T3 was studied by powder X-ray diffraction. The results indicate the formation of a smectic liquid crystal by compound T3.

Key words: &, alpha, -cyanostilbene, optical properties, thermal stabilities, liquid crystal, smectic phase

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