An optically active compound represented by the following formula (I):
wherein R₁ denotes an alkyl or alkoxy group having 1 - 18 carbon atoms; R₂ denotes an alkyl group having 1 - 12 carbon atoms; A denotes
X denotes
or -OCH₂-; and C* denotes an optically active asymmetric carbon atom. The optically active compound, when included as a component, provides a ferroelectric liquid crystal composition or device showing an improved electro-field response characteristic.
下式(I)所代表的光学活性化合物:
其中 R₁ 表示具有 1 - 18 个碳原子的烷基或烷氧基;R₂ 表示具有 1 - 12 个碳原子的烷基;A 表示
X 表示
或 -OCH₂-;以及 C* 表示具有光学活性的不对称碳原子。光学活性化合物作为一种成分,可提供一种
铁电液晶组合物或装置,显示出更好的电场响应特性。