A swallow-tailed compound of the following general formula (1),
wherein m is an integer of 4 to 10, n is an integer of 2 to 6, p is 0 or 1 and each of X and Y is independently a hydrogen or fluorine atom; and a ferrielectric liquid crystal composition consisting essentially of the swallow-tailed compound of the general formula (1) and a ferrielectric liquid crystal compound of the following general formula (2),
wherein R is a linear alkyl group having 6 to 12 carbon atoms, Z is a hydrogen or fluorine atom, r is an integer of 2 to 4 and s is an integer of 2 to 4. The ferrielectric liquid crystal composition has a ferrielectric phase in a broad temperature range and attains a fast response and a large tilt angle in a broad temperature range so that a ferrielectric liquid crystal display device having high display qualities can be provided.
以下通式(1)的燕尾化合物、
其中 m 为 4 至 10 的整数,n 为 2 至 6 的整数,p 为 0 或 1,X 和 Y 分别独立地为
氢原子或
氟原子;以及
铁电
液晶组合物,主要由通式(1)的燕尾化合物和通式(2)的
铁电
液晶化合物组成、
铁电
液晶组合物在较宽的温度范围内具有
铁电相,并在较宽的温度范围内实现快速响应和较大的倾斜角,从而可提供具有较高显示质量的
铁电
液晶显示设备。