Optically active ether derivatives represented by the formula (I):
wherein X represents -COO- or -OCO-; A represents an alkyl or alkoxyl group having 3 to 15 carbon atoms; R represents an alkyl or alkyloxyalkyl group having 1 to 20 carbon atoms; ℓ and m each represents a number of 1 or 2; and * indicates an asymmetric carbon atom; preparation processes therefor; liquid crystal materials containing such ether derivatives as active ingredient; and an optical switching element using said liquid crystal material as liquid crystal element.
由式(I)代表的光学活性醚衍
生物:
其中,X 代表 -COO- 或 -OCO-;A 代表具有 3 至 15 个碳原子的烷基或烷氧基;R 代表具有 1 至 20 个碳原子的烷基或烷氧烷基;ℓ 和 m 分别代表 1 或 2;* 表示不对称碳原子;其制备方法;含有此类醚衍
生物作为活性成分的液晶材料;以及使用上述液晶材料作为液晶元件的光学开关元件。