申请人:Chisso Corporation
公开号:US05213708A1
公开(公告)日:1993-05-25
The present invention provides a liquid crystalline compound having a large negative dielectric anisotropy value, a low viscosity and a large birefringence value and a liquid crystal composition suitable as an element constituting light switching elements. The liquid crystalline compound is expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each independently represent an alkyl group or an alkoxy group each of 1 to 15 carbon atoms and Y.sub.1 and Y.sup.2 each independently represent H or F.
本发明提供了一种具有较大负介电各向异性值、低粘度和较大双折射值的液晶化合物和适用于构成光开关元件的液晶组合物。该液晶化合物由式##STR1##表示,其中R1和R2各自独立地表示1至15个碳原子的烷基或烷氧基,Y1和Y2各自独立地表示H或F。