申请人:Chisso Corporation
公开号:US04834907A1
公开(公告)日:1989-05-30
Novel chiral smectic liquid crystalline ester compounds having a superior stability and exhibiting a high response rate when used in the form of display elements and chiral smectic mixtures containing at least one of these compounds are provided, which compounds are expressed by the formula ##STR1## wherein n is an integer of 2 to 16; l is 0, 1 or 2; m is 1 or 2 under the condition of l+m.gtoreq.2; X represents methylene group --CH.sub.2 -- or single bond when l is zero, methylene group --CH.sub.2 -- or ether linkage --O-- when l=1 or ether linkage --O-- when l=2; and Y represents R, OR, --COR, --OCOR, --OCOOR or --COOR wherein R throughout represents an alkyl group of 1 to 18 carbon atoms; and asterisk * shows an optically active carbon atom.
提供了具有优越稳定性并在显示元件中以及手性液晶混合物中使用时表现出高响应速率的新型手性液晶酯化合物,其中这些化合物由公式##STR1##表示,其中n是2到16的整数;l为0、1或2;在l+m≥2的条件下,m为1或2;当l为零时,X表示亚甲基基--CH.sub.2--或单键,当l=1时,X表示亚甲基基--CH.sub.2--或醚键--O--,当l=2时,X表示醚键--O--;Y表示R、OR、--COR、--OCOR、--OCOOR或--COOR,其中R表示1到18个碳原子的烷基;星号*表示一个光学活性碳原子。