申请人:Canon Kabushiki Kaisha
公开号:US05213709A1
公开(公告)日:1993-05-25
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote an alkyl group having 1-16 carbon atoms optionally substituted; X.sub.1 and X.sub.3 respectively denote a single bond, --O--, ##STR2## X.sub.2 denotes a single bond, ##STR3## A.sub.1 denotes a single bond ##STR4## A.sub.3 denotes ##STR5## A.sub.2 denotes 9, 10-dihydro-2,7-phenanthrenediyl, 2,7-fluorenediyl or 2,7-fluorenonediyl; n is 0 or 1; and X.sub.4 and X.sub.5 respectively denote hydrogen, F, Cl, Br, --CH.sub.3, --CN or --CF.sub.3, with proviso that X.sub.1 is a single bond when A.sub.1 is a single bond.
以下是公式(I)所代表的一种中间化合物:其中R.sub.1和R.sub.2分别表示具有1-16个碳原子的烷基基团,可选择性地取代;X.sub.1和X.sub.3分别表示单键,--O--,X.sub.2表示单键,A.sub.1表示单键,A.sub.3表示,A.sub.2表示9,10-二氢-2,7-苯并二基,2,7-芴二基或2,7-芴醌二基;n为0或1;X.sub.4和X.sub.5分别表示氢,F,Cl,Br,--CH.sub.3,--CN或--CF.sub.3,但X.sub.1为单键时,A.sub.1为单键。