Chlorofluorobenzene liquid crystal compound, liquid crystal composition and liquid crystal display device
申请人:Goto Yasuyuki
公开号:US20080075891A1
公开(公告)日:2008-03-27
A liquid crystal compound selected from a group of compounds represented by formula (a):
wherein Ra and Rb are each independently alkyl having 1 to 10 carbons, alkoxy having 1 to 9 carbons, alkoxyalkyl having 2 to 9 carbons, alkenyl having 2 to 10 carbons, alkenyloxy having 2 to 9 carbons, fluoroalkyl having 1 to 10 carbons or fluoroalkoxy having 1 to 9 carbons; ring A
1
, ring A
2
and ring A
3
are each independently trans-1,4-cyclohexylene, trans-1,3-dioxane-2,5-diyl, trans-tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, pyridine-2,5-diyl, 6-fluoropyridine-2,5-diyl or pyridazine-2,5-diyl; Z
1
, Z
2
and Z
3
are each independently a single bond, —(CH
2
)
2
—, —CH═CH—, —C≡C—, —CH
2
O, —OCH
2
—, —COO—, —OCO—, —OCF
2
—, —CF
2
O—, —CH
2
CH
2
OCF
2
— or —CF
2
OCH
2
CH
2
—; l, m and n are each independently 0, 1 or 2, provided that l+m+n is 0, 1, 2 or 3; one of X
1
and X
2
is fluorine, and the other is chlorine; Q is
and atoms comprising the compound each may be an isotope thereof.
从由式(a)表示的化合物组中选择的液晶化合物:
其中Ra和Rb分别独立地是具有1至10个碳的烷基,具有1至9个碳的烷氧基,具有2至9个碳的烷氧基烷基,具有2至10个碳的烯基,具有2至9个碳的烯氧基,具有1至10个碳的氟烷基或具有1至9个碳的氟烷氧基;环A1,环A2和环A3分别独立地是反式-1,4-环己烷基,反式-1,3-二噁烷-2,5-二基,反式-四氢吡喃-2,5-二基,1,4-苯基,2-氟-1,4-苯基,2,3-二氟-1,4-苯基,2,5-二氟-1,4-苯基,2,6-二氟-1,4-苯基,吡啶-2,5-二基,6-氟吡啶-2,5-二基或吡啶并嗪-2,5-二基;Z1,Z2和Z3分别独立地是单键,—(CH2)—,—CH═CH—,—C≡C—,—CH2O,—OCH2—,—COO—,—OCO—,—OCF2—,—CF2O—,—CH2CH2OCF2—或—CF2OCH2CH2—;l,m和n分别独立地为0,1或2,前提是l+m+n为0,1,2或3;X1和X2中的一个是氟,另一个是氯;Q是
化合物中的原子均可是其同位素。