TETRA- OR PENTA-CYCLIC LIQUID CRYSTALLINE COMPOUND HAVING LATERAL FLUORINE, LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL DISPLAY ELEMENT
申请人:Chisso Corporation
公开号:EP2206695A1
公开(公告)日:2010-07-14
The invention provides a liquid crystal compound having stability to heat, light and so forth, a wide temperature range of a nematic phase, a small viscosity, a suitable optical anisotropy, and a suitable elastic constant K33, and further having a suitable and negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds, and a liquid crystal composition having stability to heat, light and so forth, a low viscosity, a large optical anisotropy, a suitable and negative dielectric anisotropy, and a suitable elastic constant K33, a low threshold voltage, a high maximum temperature (phase-transition temperature on a nematic phase-isotropic phase) of a nematic phase, and a low minimum temperature of the nematic phase. The liquid crystal compound which has a specific structure having fluorine at a lateral position and also having phenylene in which hydrogen on the benzene ring is replaced by fluorine, and a liquid crystal composition containing the compound are prepared.
本发明提供了一种液晶化合物,它具有对热、光等的稳定性,向列相的温度范围宽,粘度小,具有适当的光学各向异性和适当的弹性常数K33,还具有适当的负介电各向异性以及与其他液晶化合物的良好兼容性、以及一种液晶组合物,该液晶组合物具有对热、光等的稳定性、低粘度、较大的光学各向异性、适当的负介电各向异性和适当的弹性常数 K33、低阈值电压、向列相的最高温度(向列相-各向同性相上的相转变温度)高以及向列相的最低温度低。本发明制备了具有特定结构的液晶化合物,该化合物的侧向位置含有氟,同时还含有苯环上的氢被氟取代的亚苯基,以及含有该化合物的液晶组合物。