申请人:The Secretary of State for Defence In Her Britannic Majesty's Government
公开号:US04769176A1
公开(公告)日:1988-09-06
Biphenyl esters of formula (I), wherein formula (II) represents formula (III) or formula (IV), R.sub.1 represents C.sub.3 -C.sub.12 alkyl, alkoxy, alkylcarbonyloxy, alkoxycarbonyl or alkoxycarbonyloxy, j is 0 or 1, R.sub.2 represents C.sub.3 -C.sub.12 alkyl or alkoxy, one of Q.sub.1 or Q.sub.2 is fluorine and the other is hydrogen, provided that when j is 0 and formula (II) is formula (III) and both R.sub.1 and R.sub.2 are n-alkyl, then the total number of carbon atoms in R.sub.1 and R.sub.2 is more than 12. These compounds may be used as constituents of liquid crystal mixtures which show a room temperature ferroelectric smectic phase, and a number of such mixtures are described.
式(I)的联苯酯,其中式(II)表示式(III)或式(IV),R.sub.1代表C.sub.3-C.sub.12烷基,烷氧基,烷基羰氧基,烷氧羰酰基或烷氧羰氧基,j为0或1,R.sub.2代表C.sub.3-C.sub.12烷基或烷氧基,Q.sub.1或Q.sub.2中的一个为氟,另一个为氢,但当j为0且式(II)为式(III)且R.sub.1和R.sub.2均为正烷基时,则R.sub.1和R.sub.2中的碳原子总数大于12。这些化合物可用作液晶混合物的组分,该混合物在室温下显示铁电液晶相,并描述了许多这样的混合物。