Negative Dielectric Anisotropic Liquid Crystal Compounds Containing 2,3-Difluorophenyl Group, and Preparation Method and Use Thereof
申请人:Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.
公开号:US20150152330A1
公开(公告)日:2015-06-04
A negative dielectric anisotropic liquid crystal compound containing 2,3-difluorophenyl, and a preparation method and use thereof are disclosed. The compound has a general structural formula as shown in Formula I. The negative dielectric anisotropic liquid crystal compound has a negative dielectric anisotropy (Δε), and has cyclobutyl or cyclopentyl as a terminal group. Compared with conventional liquid crystal compounds with a flexible alkyl chain as a terminal group, the compound of Formula I according to the present invention has the advantage of high clearing point, and enables extension of the application range of a liquid crystal mixture because a positive correlation exists between the clearing points of the liquid crystal mixture and monomer liquid crystal compounds. In addition, the compound can increase the absolute value of the negative dielectric constant of the liquid crystal mixture, thus having an important application value.
本公开揭示了一种含有2,3-二氟苯基的负介电各向异性液晶化合物,以及其制备方法和用途。该化合物具有如化学式I所示的一般结构式。该负介电各向异性液晶化合物具有负的介电各向异性(Δε),并且具有环丁基或环戊基作为末端基团。与末端基团为柔性烷基链的传统液晶化合物相比,根据本发明的化合物具有高清晰点的优点,并且能够扩展液晶混合物的应用范围,因为液晶混合物的清晰点与单体液晶化合物的清晰点之间存在正相关关系。此外,该化合物可以增加液晶混合物的负介电常数的绝对值,因此具有重要的应用价值。