申请人:Clariant International Ltd.
公开号:US20030108684A1
公开(公告)日:2003-06-12
Compounds of the formula (I), liquid-crystal mixtures comprising these compounds, and their use in liquid-crystal displays:
1
in which
R
1
is H, F, CF
3
, OCF
3
, OCF
2
H, OCFH
2
, an alkyl radical or alkyloxy radical or an alkenyl radical or alkenyloxy radical;
R
2
is H, an alkyl radical or alkyloxy radical or an alkenyl radical or alkenyloxy radical
M
1
is —C(═O)O—, —OC(═O)—, —CH
2
O—, —OCH
2
—, —OCF
2
—, —CF
2
O—, —C≡C—, —CH
2
CH
2
—, —CF
2
CF
2
—, —CF═CFC(═O)O— or a single bond
M
2
is —C(═O)O—, —OC(═O)—, —CH
2
O—, —OCH
2
—, —CH
2
CH
2
—, —CF
2
CF
2
— or a single bond;
A
1
and A
2
are &agr;-1,4-diyl, unsubstituted or mono- or disubstituted by F; where &agr; is: phenylene, cyclohexane,1-cyclohexene
or 1,3-dioxane-2,5-diyl;
m and n are zero or 1; m+n=0 or 1
L
1
, L
2
, L
3
, L
4
and L
5
are H or F.
式 (I) 的化合物、包含这些化合物的液晶混合物及其在液晶显示器中的应用:
1
其中
R
1
是 H、F、CF
3
、OCF
3
OCF
2
H、OCFH
2
烷基、烷氧基、烯基或烯氧基;
R
2
是 H、烷基或烷氧基、烯基或烯酰氧基
M
1
是-C(═O)O-、-OC(═O)-、-CH
2
O-、-OCH
2
-、-OCF
2
-、-CF
2
O-、-C≡C-、-CH
2
CH
2
-、-CF
2
CF
2
-、-CF═CFC(═O)O- 或单键
M
2
是-C(═O)O-、-OC(═O)-、-CH
2
O-、-OCH
2
-、-CH
2
CH
2
-,-CF
2
CF
2
- 或单键;
A
1
和 A
2
是&agr;-1,4-二基,未被 F 取代或被 F 单取代或二取代;其中&agr;是:亚苯基、环己烷、1-环己烯
或 1,3-二恶烷-2,5-二基;
m 和 n 为 0 或 1;m+n=0 或 1
L
1
, L
2
, L
3
, L
4
和 L
5
为 H 或 F。