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.
以下为化学式(I)所代表的一种介向化合物:
##STR1##
其中,R1和R2分别表示1-16个碳原子的烷基基团,可以选择性地被取代;X1和X3分别表示单键,--O--,##STR2##;X2表示单键,##STR3##;A1表示单键,##STR4##;A3表示##STR5##;A2表示9,10-二氢-2,7-菲基二基苯基、2,7-芴二基苯基或2,7-芴酮二基苯基;n为0或1;X4和X5分别表示氢、F、Cl、Br、--CH3、--CN或--CF3,但X1为单键时,A1为单键。