Method of increasing helical twisting power, optically active compound, liquid crystal composition containing the same, and liquid crystal display device
申请人:Dainippon Ink and Chemicals, Inc.
公开号:US20040021128A1
公开(公告)日:2004-02-05
A method of increasing helical twisting power (HTP) in an optically active compound used in a liquid crystal material is provided. An optically active compound which exhibits a large HTP value is also provided. Furthermore, a liquid crystal composition which exhibits a high upper temperature limit of the liquid crystal after the addition of the optically active compound, and a liquid crystal display device using the same are provided. In a method, an HTP of a compound having a partial structure represented by formula (A), which has an asymmetric carbon atom, is increased by replacing the partial structure represented by formula (A) by a partial structure represented by formula (B).
1
(wherein * represents the position of an asymmetric carbon atom, Y
1
represents a substituent such as an alkyl group and a halogen).
A compound is represented by formula (I):
2
本发明提供了一种增加液晶材料中所使用的光学活性化合物的螺旋扭曲功率(HTP)的方法。还提供了一种具有大的HTP值的光学活性化合物。此外,还提供了一种在加入光学活性化合物后具有高液晶上限温度的液晶组合物和使用该组合物的液晶显示器装置。在该方法中,通过用式(B)所表示的部分结构替换具有不对称碳原子的部分结构所表示的式(A)的化合物的HTP来增加其HTP。(其中*表示不对称碳原子的位置,Y1表示取代基,如烷基和卤素)。化合物由式(I)表示: