Liquidcrystalline cyclohexylbenzene derivatives their manufacturing and novel nematic admixtures containing same
申请人:Wojskowa Akademia Techniczna im.
Jaroslawa Dabrowskiego
公开号:EP0272580A2
公开(公告)日:1988-06-29
New compounds of the general formula I:
wherein R¹ is a normal or branched alkyl chain H2n+1Cn- or a normal or branched alkoxy group H2n+1CnO-, n being an integer number from 1 to 12; X is a bridging group from the set: -COO-, -OCO-, -CH₂O-, -OCH₂-, -COCH₂-, -CHOHCH₂-, -CH=CH-,-CH₂CH₂-, -CHClCH₂-, -CHCNCH₂-, -CHBrCH₂-, -CHFCH₂-, -CHOCH₃CH₂-; Y is a terminal group from the set: -NO₂, -NH₂, -NCS, -Cl, -Br, -F; the cyclohexane rings are trans-1,4-disubstituted ones and the benzene rings are 1,4-disubstituted ones, and besides one of them may contain sometimes additionally a fluorine atom in position 2 or 3, k and l are integer numbers from the set: 0, 1, 2 fulfilling the condition that k+1=2 or 3; besides, if X denotes the -COO- or -OCO- group, then k+1 also may assume the value of 1 , their manufacture and liquid crystalline admixture containing them and use for electro-optical devices as dielectrics are described.
通式 I 的新化合物
其中 R¹ 是正链或支链烷基 H2n+1Cn- 或正链或支链烷氧基 H2n+1CnO-,n 是 1 至 12 之间的整数;X 是来自以下集合的桥基:-COO-、-OCO-、-CH₂O-、-OCH₂-、-COCH₂-、-CHOHCH₂-、-CH=CH-、-CH₂CH₂-、-CHClCH₂-、-CHCNCH₂-、-CHBrCH₂-、-CHFCH₂-、-CHOCH₃CH₂-;Y 是一组中的末端基团:-环己烷环是反式-1,4-二取代环,苯环是 1,4-二取代环,此外,其中一个环有时还可能在第 2 位或第 3 位含有一个氟原子,k 和 l 是一组中的整数:此外,如果 X 表示-COO-或-OCO-基团,则 k+1 的值也可以是 1。