Liquid-crystalline medium and high-frequency components comprising same

Liquid-crystal medium, characterised in that it comprises

• one or more compounds selected from the group of compounds of formulae CC and CP
• in which
• Alkenyl denotes unfluorinated alkenyl having 2 to 15 C atoms,
• R01 denotes unfluorinated alkyl having 1 to 17 C atoms or unfluorinated alkenyl having 2 to 15 C atoms, and
• R02 denotes unfluorinated alkyl having 1 to 17 C atoms or unfluorinated alkenyl having 2 to 15 C atoms,
• one or more compounds selected from the group of compounds of formulae I, II and III
• in which
• L11 denotes R11 or X11,
• L12 denotes R12 or X12,
• R11 and R12, independently of one another, denote H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 15 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms,
• X11 and X12, independently of one another, denote H, F, Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated or fluorinated alkoxyalkyl having 2 to 7 C atoms, and
• independently of one another, denote
• in which
• L21 denotes R21 and, in the case where Z21 and/or Z22 denote trans-CH═CH— or trans-CF═CF—, alternatively denotes X21,
• L22 denotes R22 and, in the case where Z21 and/or Z22 denote trans-CH═CH— or trans-CF═CF—, alternatively denotes X22,
• R21 and R22, independently of one another, denote H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17, preferably having 3 to 10, C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15, preferably 3 to 10, C atoms,
• X21 and X22, independently of one another, denote F or Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, fluorinated alkenyloxy or fluorinated alkoxyalkyl having 2 to 7 C atoms,
• one of
• Z21 and Z22 denotes trans-CH═CH—, trans-CF═CF— or —C≡C— and the other, independently thereof, denotes trans-CH═CH—, trans-CF═CF— or a single bond, and
• independently of one another, denote
• in which
• L31 denotes R31 or X31,
• L32 denotes R32 or X32,
• R31 and R32, independently of one another, denote H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms,
• X31 and X32, independently of one another, denote H, F, Cl, —CN, —NCS, —SF5, fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, unfluorinated or fluorinated alkenyloxy or unfluorinated or fluorinated alkoxyalkyl having 2 to 7 C atoms,
• Z31 to Z33, independently of one another, denote trans-CH═CH—, trans-CF═CF—, —C≡C— or a single bond, and
• independently of one another, denote
• and
• optionally one or more
• polymerisable, preferably mesogenic, compounds preferably of formula P
• Pa—(Spa)s1-(A1Z1)n1-A2-Q-A3-(Z4-A4)n2-(Spb)s2-Pb P
• wherein the individual radicals have the following meanings:
• Pa, Pb each, independently of one another, are a polymerisable group,
• Spa, Spb each, independently of one another, denote a spacer group,
• s1, s2 each, independently of one another, denote 0 or 1,
• n1, n2 each, independently of one another, denote 0 or 1, preferably 0,
• Q denotes a single bond, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —(CO)O—, —O(CO)—, —(CH2)4—, —CH2—CH2—, —CF2—CF2—, —CF2—CH2—, —CH2—CF2—, —CH═CH—, —CF═CF—, —CF═CH—, —(CH2)3O—, —O(CH2)3—, —CH═CF—, —C≡C—, —O—, —CH2—, —(CH2)3—, CF2, preferably —CF2O—,
• Z1, Z4 each, independently of one another, denote a single bond, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —(CO)O—, —O(CO)—, —(CH2)4—, —CH2—CH2—, —CF2—CF2—, —CF2—CH2—, —CH2—CF2—, —CH═CH—, —CF═CF—, —CF═CH—, —(CH2)3O—, —O(CH2)3—, —CH═CF—, —C≡C—, —O—, —CH2—, —(CH2)3—, —CF2—, where Z1 and Q or Z4 and Q do not simultaneously denote a group selected from —CF2O— and —OCF2—,
• A1, A2, A3, A4 each, independently of one another, denote a diradical group selected from the following groups:
• a) the group consisting of trans-1,4-cyclohexylene, 1,4-cyclohexenylene and 1,4-bicyclohexylene, in which, in addition, one or more non-adjacent CH2 groups may be replaced by —O— and/or —S— and in which, in addition, one or more H atoms may be replaced by F,
• b) the group consisting of 1,4-phenylene and 1,3-phenylene, in which, in addition, one or two CH groups may be replaced by N and in which, in addition, one or more H atoms may be replaced by L,
• c) the group consisting of tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, tetrahydrofuran-2,5-diyl, cyclobutane-1,3-diyl, piperidine-1,4-diyl, thiophene-2,5-diyl and selenophene-2,5-diyl, each of which may also be mono- or polysubstituted by L,
• d) the group consisting of saturated, partially unsaturated or fully unsaturated, and optionally substituted, polycyclic radicals having 5 to 20 cyclic C atoms, one or more of which may, in addition, be replaced by heteroatoms, preferably selected from the group consisting of bicyclo[1.1.1]pentane-1,3-diyl, bicyclo[2.2.2]octane-1,4-diyl, spiro[3.3]heptane-2,6-diyl,
• where, in addition, one or more H atoms in these radicals may be replaced by L, and/or one or more double bonds may be replaced by single bonds, and/or one or more CH groups may be replaced by N,
• and A3, alternatively may be a single bond,
• L on each occurrence, identically or differently, denotes F, Cl, CN, SCN, SF5 or straight-chain or branched, in each case optionally fluorinated, alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 12 C atoms,
• R03, R04 each, independently of one another, denote H, F or straight-chain or branched alkyl having 1 to 12 C atoms, in which, in addition, one or more H atoms may be replaced by F,
• M denotes —O—, —S—, —CH2—, —CHY1— or —CY1Y2—, and
• Y1 and Y2 each, independently of one another, have one of the meanings indicated above for R0, or denote Cl or CN, and one of the groups Y1 and Y2 alternatively denotes —OCF3, preferably H, F, Cl, CN or CF3.