摘要:
Liquid crystal mixture comprising compounds of formula (I) wherein R1: is H or a linear or branched alkyl group or branched alkenyl group R2: stands for a) H or F b) a linear or branched alkyl group or a linear or branched alkenyl group c) a radical wherein R3, R4, R5, R6: are an alkyl group M1, M2: represent independently from another a single bond, —OC(═O), —C(═O)O—, —OCH2—, —NH— A: is a) a linear or branched alkan-α,ω-diylgroup or alkene-α,ω-diyl group b) the group —C(═Y)— wherein Y is CH-Z with Z being phenylen-1,4-diyl, optionally substituted by one to three halogenatoms, alkyl or alkyloxy groups, c) the group —CHY wherein Y is CH2-Z with Z being phenylen-1,4-diyl, optionally substituted by one to three halogenatoms, alkyl or alkyloxy groups d) a group wherein p, q are 0, 1 or 2; M3 is a single bond or —OC(═O)—, —C(═O)O—, —OCH2—, —CH2O—, —C≡C—, —CH2CH2—, —CH2CH2CH2CH2— the radicals are phenylen-1,4-diyl, X is H, OH, a linear or branched alkyl or alkyloxy group, m: is 0 or 1 X and M1-(A)m-M2-R2 together can constitute a) a ring of 4 to 16 members, b) a combination of two either directly linked or spiro-linked rings.
摘要:
Liquid crystal mixture comprising one or several compounds of formula (I) (I) wherein R1, R2, R3, R4, R5, R6, M1, M2, X, A, and m are defined herein.
摘要:
Fluorinated five-membered ring compounds of the formula (I) R1—X—(A1—M1)a—(A2—M2)b—A3—Y—E (I) where E is a radical T—Z—R2 containing a five-membered ring and, for example, T is undirected and is 4-fluorothiophene-2,5-diyl, 3-fluorothiophene-2,5-diyl, 3-fluorothiophene-2,4-diyl, 5-fluorothiophene-2,4-diyl, furan-2,5-diyl, furan-2,4-diyl, isoxazole-3,5-diyl, thiazole-2,5-diyl, thiazole-2,4-diyl, cyclopentane-1,3-diyl or cyclopentene-1,3-diyl, R1 and R2 are hydrogen, X is a single bond, —O—, OC(═O)—, —C(═O)O— or —OC(═O)O—, Y is —OC(═O)—, —OCH2—, —CH2CH2—, Z is a single bond or —O—, A1, A2, A3 are each, independently of one another, phenylene-1,4-diyl, M1, M2 are undirected and are each, independently of one another, —OC(═O)—, —OCH2—, —CH2CH2—, —OC(═O)CH2CH2—, —OCH2CH2CH2—, —C≡C—, —CH2CH2CH2CH2— or a single bond, a, b are each, independently of one another, 0 or 1, are used in FLC mixtures.
摘要:
Difluorophenylpyrimidylpyridine derivatives of the formula (I) ##STR1## wherein X is N and Y is CH or X is CH and Y is N;R.sup.1 and R.sup.2 are identical or different and area) an unbranched or branched alkyl chain having 1 to 20 carbon atoms, whereaa) one or more non-adjacent and non-terminal CH.sub.2 groups may be replaced by --O--, --CO--O--, --O--CO--, --O--CO--O-- or --Si(CH.sub.3).sub.2 --, and/orab) one or more H atoms may be replaced by F, and/orac) the terminal CH.sub.3 group may be replaced by one of the following chiral groups (optically active or racemic): ##STR2## R.sup.3, R.sup.4 and R.sup.5 are identical or different and are hydrogen or a straight-chain or branched alkyl radical having 1-16 carbon atoms (with or without an asymmetrical carbon atom), where, in addition, one or more non-adjacent non-terminal CH.sub.2 groups may be replaced by --O--, and/or where one or more H atoms of the alkyl radical may be substituted by --F; R.sup.4 and R.sup.5 may alternatively together be --(CH.sub.2).sub.4 -- or --(CH.sub.2).sub.5 -- if they are bonded to a dioxolane system,are suitable as components, in particular, of ferroelectric liquid-crystal mixtures.
摘要:
Compounds of the formula (I) R1—A—Z1 (I) in which: R1 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) —CH2— 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 Z1 is F, OCHxF3−x or CHxF3−x, where, in each case, x is 0, 1 or 2, OC2HzF5−z or C2HzF5−z, where, in each case, z is 0, 1, 2, 3 or 4, CH═CF2 or Cl, with the proviso that 2-fluoro-7-methoxy-phenanthrene is excluded.
摘要翻译:其中:R1是具有1-8个碳原子的烷基或具有2至8个碳原子的烯基的式(I)化合物,其中在每种情况下都可以被一个(非终端的)-CH 2 - 基团取代 通过-O - 或-C(= O)O-和/或一个或多个H可以被FA代替为菲-2,7-二基或9,10-二氢菲-2,7-二基Z1为F,OCHxF3- x或CH x F 3-x,其中,在每种情况下,x为0,1或2,OC2HzF5-z或C2H5F5-z,其中,在每种情况下,z为0,1,2,3或4,CH = CF 2或 Cl,条件是排除了2-氟-7-甲氧基菲。
摘要:
The invention relates to liquid-crystalline (dihydro)phenanthrene derivatives of the formula I in which R, G, A1, Z1, m, L1, L2, L3, L4, L5 and Y are as defined in claim 1, and to liquid-crystalline media comprising at least one (dihydro)phenanthrene derivative of the formula I, and to electro-optical displays containing a liquid-crystalline medium of this type.
摘要:
In the fluorinated azoles of the formula (I) R1(—A1)a—T—(A2—)b(M—A3—)cR2 (I) the symbols and indices have -the following meanings: T is undirected and is 4-fluorothiazole-2,5-diyl, 5-fluorothiazole-2,4-diyl, 4-fluorooxazole-2,5-diyl, 5-fluorooxazole-2,4-diyl or 4-fluoroisoxazole-2,5-diyl; R1 and R2 are identical or different and are hydrogen or a straight-chain or branched C1-20-alkyl or C2-20-alkenyl radical (with or without asymmetrical carbon atoms); A1, A2 and A3 are identical or different and are, for example, phenylene-1,4-diyl or cyclohexane-1,4-diyl; M is undirected and is —OC(═O)—, —OCH2—, —CH2CH2—, —OC(═O)CH2CH2—, —OCH2CH2CH2—, —C≡C—, —CH2CH2CH2CH2— or a single bond; a, b and c, independently of one another, are 0 or 1, with the proviso that the sum a+b+c is 1 or 2.
摘要:
A ferroelectric liquid crystal mixture, especially useful for operation in the &tgr;Vmin−mode, comprises a 5-Arylindane derivative of the formula (I), wherein Y is CH, CF or N and R1(—A1—M1)a(—A2—M2)b—, (M3—A3—)cR2 are mesogenic groups.