Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (21): 2499-2504. Previous Articles    



  1. (四川师范大学化学与材料科学学院 成都 610066)
  • 投稿日期:2006-11-10 修回日期:2007-04-04 发布日期:2007-11-14
  • 通讯作者: 赵可清

Synthesis and Mesomorphism of Perfluoroalkyl Chain Containing Biphenyl Liquid Crystals

WANG Bi-Qin; WANG Xin-Ling; ZHAO Ke-Qing*; HU Ping   

  1. (College of Chemistry and Material Sciences, Sichuan Normal University, Chengdu 610066)
  • Received:2006-11-10 Revised:2007-04-04 Published:2007-11-14
  • Contact: ZHAO Ke-Qing

Perfluorinated or semi-perfluorinated alkyl chain containing achiral liquid crystals can display ferroelectric liquid crystalline properties, which have great potential applications to industry, therefore have attracted the attention of researchers. In this report, biphenylyl 4-perfluorohexylbenzoate liquid crystalline compounds ROC6H4C6H4O2CC6H4C6F13 and C3H7C6H4C6H4O2CC6H4C6F13, (R=CnH2n+1, n=6, 8, 10, 12, 16) have been synthesized. Their mesogenic behavior was investigated with differential scanning calorimetry (DSC) and polarized op-tical microscopy (POM). The results showed that the alkyl chain compounds exhibited nematic phases with higher melting points, lower clearing points, therefore narrower mesophase temperature ranges. The per-fluoroalkyl chain containing molecules showed highly ordered smectic phases with lower melting points, higher clearing points and broader mesophases.

Key words: liquid crystal, 4-propylbiphenyl-4'-ol, perfluoroalkyl chain, fluorophilic effect, fluorophobic effect