Provided is a polar compound having high chemically stability, high ability to align liquid crystal molecules, and high solubility in a liquid crystal composition, and which has a large voltage-holding ratio in a liquid crystal display element. Specifically, compound (1) is provided.
R1-MES-Sp1-P1 (1)
For example, R1 is a C1-15 alkyl; MES is a mesogenic group having at least one ring; Sp1 is a single bond or a C1-10 alkylene, in this alkylene, at least one hydrogen is substituted by a group (1a); P1 is a group (1e) or (If);
M1, M2, M3 and M4 are hydrogen; Sp2 and Sp3 are a single bond or a C1-10 alkylene; R2 is a C1-15 alkyl; R3 is a group (1g), (1h) or (1i);
Sp4 and Sp5 are a single bond or a C1-10 alkylene; S1 is >CH-, S2 is >C<; and X1 is -OH.
本发明提供了一种极性化合物,它在液晶组合物中具有较高的
化学稳定性、较强的液晶分子排列能力和较高的溶解度,并且在液晶显示元件中具有较大的电压保持率。具体而言,提供了化合物 (1)。
R1-
MES-Sp1-P1 (1)
例如,R1 是 C1-15 烷基;
MES 是至少有一个环的介原基;Sp1 是单键或 C1-10 亚烷基,在该亚烷基中,至少有一个氢被基团(1a)取代;P1 是基团(1e)或(If);
M1、M2、M3 和
M4 为氢;Sp2 和 Sp3 为单键或 C1-10 亚烷基;R2 为 C1-15 烷基;R3 为基团 (1g)、(1h) 或 (1i);
Sp4和Sp5是单键或C1-10亚烷基;S1是>CH-,S2是>C<;X1是-OH。