LIQUID CRYSTAL COMPOUND HAVING XANTHENE SKELETON AND EXHIBITING NEGATIVE DIELECTRIC ANISOTROPY, LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL DISPLAY ELEMENT
申请人:JNC Corporation
公开号:EP2987790A1
公开(公告)日:2016-02-24
To provide a liquid crystal compound satisfying at least one of physical properties such as a high stability to heat, light and so forth, a high clearing point, a low minimum temperature of a liquid crystal phase, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a suitable elastic constant and an excellent compatibility with other liquid crystal compounds.
The compound is represented by formula (1).
In the formula, for example, R1 and R2 are alkyl having 1 to 15 carbons; ring A1 and ring A2 are 1,4-cyclohexylene or 1,4-phenylene, Z1 and Z2 are a single bond, -(CH2)2-, -CH=CH-, -C≡C-, -COO-, -OCO-, -CH2O-, -OCH2-, -CF2O-, -OCF2- or -CF=CF-, a and b are 0, 1 or 2, and a sum of a and b is 1 or 2.
提供一种液晶化合物,它至少满足以下物理特性中的一项:对热、光等的高稳定性、高澄明点、低液晶相最低温度、小粘度、适当的光学各向异性、大的负介电各向异性、适当的弹性常数以及与其他液晶化合物的良好兼容性。
该化合物用式(1)表示。
例如,在式中,R1 和 R2 是具有 1 至 15 个碳原子的烷基;环 A1 和环 A2 是 1,4-环己烯或 1,4-亚苯基,Z1 和 Z2 是单键、-(CH2)2-、-CH=CH-、-C≡C-、-COO-、-OCO-、-CH2O-、-OCH2-、-CF2O-、-OCF2- 或-CF=CF-,a 和 b 是 0、1 或 2,a 和 b 之和是 1 或 2。