Compounds of the formula (I)
R
1
—A—Z
1
(
1
)
in which:
R
1
is an alkyl radical having 1 to 8 carbon atoms or an alkenyl radical having 2 to 8 carbon atoms, where, in each case, one (nonterminal) —CH
2
— group may also be replaced by —O— or —C(═O)O— and/or one or more H may be replaced by F
A is phenanthrene-2,7-diyl or 9,10-dihydrophenanthrene-2,7-diyl
Z
1
is F, OCH
x
F
3-x
or CH
x
F
3-x
, where, in each case, x is 0, 1 or 2, OC
2
H
z
F
5-z
or C
2
H
z
F
5-z
, where, in each case, z is 0, 1, 2, 3 or 4, CH═CF
2
or Cl,
with the proviso that 2-fluoro-7-methoxy-phenanthrene is excluded.
化合物的式子(I)R1-A-Z1(1),其中:R1是具有1至8个碳原子的烷基基团或具有2至8个碳原子的烯基基团,在每种情况下,一个(非末端)的—
CH2—基团也可以被—O—或—C(═O)O—所取代,和/或一个或多个氢可以被FA所取代。A是
菲(Phenanthrene)的2,7-二基或
9,10-二氢菲的2,7-二基。Z1是F、OCHxF3-x或CHxF3-x,其中,在每种情况下,x为0、1或2,OC2HzF5-z或C2HzF5-z,其中,在每种情况下,z为0、1、2、3或4,CH═
CF2或Cl,但排除2-
氟-7-甲氧基
菲。