CJCU

Chem. J. Chinese Universities

• 研究论文 • Previous Articles     Next Articles

Synthesis and Characterization of Liquid Crystalline Poly(p-phenylene ethynylene)s with Laterally Attached Dipolar Unit

ZHENG Shi-Jun1*, HUANG Yuan-Can1, WEN Gang1, LUO Fei1, LI Shao-Feng1, CAO Shao-Kui1, CHEN Si2   

    1. College of the Material Science and Engineering, Zhengzhou University, Zhengzhou 450052, China;
    2. Department of Polymer Science and Engineering, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
  • Received:2007-10-22 Revised:1900-01-01 Online:2008-05-10 Published:2008-05-10
  • Contact: ZHENG Shi-Jun

PDF (PC)

Abstract: Poly(p-phenylene ethynylene)s containing laterally attached dipolar unit were synthesized with Sonogashira coupling reaction using different Pd catalysts in order to develop new organic materials with polarized dichroism. The structures and properties of the intermediate were identified via elementary analysis, IR, NMR etc. The polymers were soluble in common organic solvents and exhibited enantiotropic liquid crystal behavior. It is found that the polymers prepared with different Pd catalysts have similar molecular weights and mesophase temperature. The kind of catalysts has a large effect on the structures of the polymer main chain and polymers textures. The study of thermal WAXD suggests that the polymers formed a Nematic phase.

Key words: Poly(p-phenylene ethynylene), Liquid crystalline conjugated polymer, Materials with polarized light

CLC Number: 

TrendMD: