Novel lactic acid derivatives and liquid crystal compositions containing the same
申请人:DAINIPPON INK AND CHEMICALS, INC.
公开号:EP0329153A2
公开(公告)日:1989-08-23
compound represented by formula (I):
wherein R1 represents an alkyl group having from 1 to 18 carbon atoms; R2 represents an alkyl group having from 2 to 16 carbon atoms; rings A, B, C, and D each represents a 1,4-phenylene group or a 1,4-phenylene group having one or two halogen atoms; Y represents a single bond,
m and n each represents 0 or 1; p represents 0, 1, or 2; q represents 0 or an integer of from 1 to 6; and C* and C" each represents an asymmetric carbon atom in an (S)- or (R)-configuration, and a liquid crystal composition containing the compound of formula (I). The compound of formula (I) is a chiral liquid crystal compound exhibiting large spontaneous polarization, a long helical pitch, an SC* phase in a broad temperature range including room temperature, satisfactory orientation, and a high rate of response.
式 (I) 所代表的化合物:
其中 R1 代表具有 1 至 18 个碳原子的烷基;R2 代表具有 2 至 16 个碳原子的烷基;环 A、B、C 和 D 各代表 1,4-亚苯基或具有一个或两个卤素原子的 1,4-亚苯基;Y 代表单键、
m和n各自代表0或1;p代表0、1或2;q代表0或1至6的整数;以及C*和C "各自代表(S)-或(R)-构型的不对称碳原子,以及含有式(I)化合物的液晶组合物。式(I)化合物是一种手性液晶化合物,具有较大的自发偏振、较长的螺旋间距、在包括室温在内的较宽温度范围内的 SC* 相、令人满意的取向性和较高的响应速度。