申请人:Clariant International Ltd.
公开号:US06403172B1
公开(公告)日:2002-06-11
Benzothiophene derivatives of the formula (I) are used as components of liquid-crystal mixtures
where the symbols and indices have the following meanings:
X1 and X2, independently of one another, are —CH—, —CF—, the —(R1)C— group or the —(R1—A1—M1)C— group, with the provisos that
x1) X1 and X2 are not simultaneously the —(R1)C— or —(R1—A1—M1)C— group, and
x2) X1 and X2 are only simultaneously —CH— or —CF— if Z is fluorine
Y1 and Y2, independently of one another, are hydrogen or fluorine, but both are not simultaneously fluorine
z is hydrogen or fluorine
R1 and R2, independently of one another, are, for example, a straight-chain or branched alkyl radical (with or without asymmetrical carbon atoms) having 1 to 20 carbon atoms,
A1 and A2 are, for example, phenylene-1,4-diyl,
M1 is undirected and is —OC(═O)—, —OC(═O)O—, —OCH2—, —(CH2)n—, —OC(═O)CH2CH2—, —OCH2CH2CH2—, —C≡C— or a single bond,
m is 0 or 1,
n is from 1 to 6.
苯并噻吩衍生物的化学式(I)用作液晶混合物的组分,其中符号和指数具有以下含义:X1和X2,彼此独立,分别为—CH—、—CF—、—(R1)C—基团或—(R1—A1—M1)C—基团,但需满足以下条件:x1)X1和X2不同时为—(R1)C—或—(R1—A1—M1)C—基团;x2)仅当Z为氟时,X1和X2才能同时为—CH—或—CF—;Y1和Y2,彼此独立,分别为氢或氟,但不同时为氟;Z为氢或氟;R1和R2,彼此独立,例如为直链或支链烷基基团(带有或不带有不对称碳原子),碳原子数为1至20;A1和A2,例如为苯-1,4-二基苯基;M1为未定向的,为—OC(═O)—、—OC(═O)O—、—OCH2—、—(CH2)n—、—OC(═O)CH2CH2—、—OCH2CH2CH2—、—C≡C—或单键;m为0或1;n为1至6。