| 摘要 |
The present disclosure discloses a liquid crystal compound and a liquid crystal composition. The liquid crystal compound has a general structural formula as represented by formula I. The liquid crystal composition provided by the present disclosure has a lower rotary viscosity γ1, can achieve a quick response, and further has an appropriate dielectric anisotropy Δε, an appropriate optical anisotropy Δn, a high stability to heat and light, a high VHR numerical value especially in the case where the liquid crystal is under harsh conditions, and a stability to electric field and electromagnetic radiation. As a liquid crystal material for use in thin film transistor techniques (TFT-LCD), the material further has the properties of a wider nematic phase temperature range, an appropriate birefringence anisotropy, a very high electrical resistivity, a good anti-ultraviolet performance, a high charge holding rate, a low vapor pressure etc.; |
| 主权项 |
1. A compound as represented by formula I, in said formula I, R1 represents an alkyl having a carbon atom number of 1-9, a fluoro-substituted alkyl having a carbon atom number of 1-9, an alkoxy having a carbon atom number of 1-9, a fluoro-substituted alkoxy having a carbon atom number of 1-9, an alkenyl having a carbon atom number of 2-9, a fluoro-substituted alkenyl having a carbon atom number of 2-9, an alkenyloxy having a carbon atom number of 3-8, or an alkenyloxy having a carbon atom number of 3-8;represents 1,4-phenylene, fluoro-substituted 1,4-phenylene, 1,4-cyclohexylidene, 1,4-cyclohexenylene, or 1,4-cyclohexylidene with one or two —CH2— being substituted by oxygen atoms;
X1 and X3 each independently represent hydrogen or fluorine; and X2 represents hydrogen, fluorine, an alkyl having a carbon atom number of 1-9, an alkoxy having a carbon atom number of 1-9, a fluoro-substituted alkyl having a carbon atom number of 1-9, a fluoro-substituted alkoxy having a carbon atom number of 1-9, or an alkenyl having a carbon atom number of 2-9. |
