| abstract |
The present invention provides a kind of liquid crystal compounds, liquid-crystal composition, liquid crystal display element, and above-mentioned liquid crystal compounds meet that high to the stability of light, brocken spectrum is high, liquid crystalline phase lower limit temperature is low, viscosity is small, optical anisotropy is appropriate, dielectric anisotropy is big, the dielectric constant of short-axis direction is big, elastic constant is appropriate, at least one of the physical property such as excellent in compatibility.Compound of the liquid crystal compounds of the present invention represented by formula (1).For example, R 1 For the alkyl of carbon number 1~15, ring A 1 ~ring A 4 For Isosorbide-5-Nitrae cyclohexylidene or Isosorbide-5-Nitrae phenylene, Z 1 ~Z 4 It is at least one be CF 2 O, remaining and W 1 For singly-bound, (CH 2 ) 2 , COO or CH 2 O, X 1 For halogen, C ≡ N, CF 3 Or OCF 3 , L 1 、L 2 For hydrogen or fluorine, Y 1 、Y 2 For fluorine；A, b, c, d are 0 or 1, and are 1 or 2. |