申请人:SANYO CHEMICAL INDUSTRIES, LTD.
公开号:EP0500210A2
公开(公告)日:1992-08-26
Smectic C liquid crystal compounds, represented by the following formula (1) or (2) are disclosed.
wherein R1 and R2 are C1-18 alkyl groups; A is a cyclic group, such as substituted or unsubstituted 1,4-phenylene group,
X is direct bond, O or C-C ; Z is -C≡C- or -CH2CH2-; one of A1 and A2 is 1,4-phenylene group and the other is 2,3-difluoro-1,4-phenylene group ; and p is 0 or 1.
These compounds can provide ferroelectric liquid crystal composition of low viscosity, and are useful as a component giving negative dielectric anisotropy and enlarging a temperature range showing smectic C phase.
液晶化合物Smectic C,其化学式如下(1)或(2)所示。其中,R1和R2为C1-18烷基基团;A为环状基团,如取代或未取代的1,4-苯基基团;X为直接键,O或C-C;Z为-C≡C-或-CH2CH2-;A1和A2中的一个为1,4-苯基基团,另一个为2,3-二氟-1,4-苯基基团;p为0或1。这些化合物可以提供低粘度的铁电液晶组合物,并且可作为给出负介电各向异性并扩大显示Smectic C相的温度范围的组分。