Yonggang Yang, Haitao Li, Jianxun Wen  

 Liq. Cryst., 2007, 34, 975-979.

           Some fluorinated chiral liquid crystals were synthesized and the compounds characterized by IR, 1H NMR, 19F NMR and mass spectroscopy and elemental analysis. Their phase transition behaviour was investigated by differential scanning calorimetry and polarizing optical microscopy. Nearly all of the compounds synthesized are liquid crystals with an enantiotropic cholesteric phase. Some of them exhibit a blue phase. Lateral tetrafluoro substitution decreases the clearing point and molecular polarity affects the formation of liquid crystalline phases.