Compound having dibenzofuran ring, liquid crystal composition, and liquid crystal display element
AssigneesJnc Corporation, Jnc Petrochemical Corporation
InventorAkihiro TAKATA
Life of this patent
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Abstract
A liquid crystalline compound, a liquid crystal composition, and a liquid crystal display element are provided. The liquid crystalline compound satisfying at least one physical property among high stability against heat and light, high transparency, low minimum temperature of the liquid crystal phase, low viscosity, proper optical anisotropy, negatively large dielectric anisotropy, proper elastic constant, good compatibility with other liquid crystalline compounds at room temperature and low temperature. The liquid crystalline compound represented by formula (1).
Claims12
A compound represented by Formula (1):
- in Formula (1),
- R1 and R2 independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and in the alkyl group, at least one —CH2— is optionally substituted with —O—, —S—, —CO—, or —SiH2—, at least one —CH2CH2— is optionally substituted with —CH═CH— or —C≡C—, and in these groups, at least one hydrogen atom is optionally substituted with a fluorine atom;
- the ring A1 represents 1,2-cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,3-cyclopentenylene, or 1,4-cyclopentenylene, and in these groups, at least one —CH2— is optionally substituted with —O—;
- the ring N1 represents 1,4-cyclohexylene, decahydronaphthalene-2,6-diyl, or 1,4-phenylene, and in these groups, at least one —CH2— is optionally substituted with —O—, —S—, —CO—, or —SiH2—, at least one —CH2CH2— is optionally substituted with —CH═CH— or —CH═N—, and in these divalent groups, at least one hydrogen atom is optionally substituted with a fluorine atom, a chlorine atom, —C≡N, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2, or —OCH2F;
- Y1 and Y2 independently represent a hydrogen atom, a fluorine atom, a chlorine atom, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2, or —OCH2F;
- n is 0, 1 or 2;
- Z1 and Z2 independently represent a single bond or an alkylene group having 1 to 6 carbon atoms, and in the alkylene group, at least one —CH2— is optionally substituted with —O—, —S—, or —CO—, one or two —CH2CH2—'s are optionally substituted with —CH═CH— or —C≡C—, and in these divalent groups, at least one hydrogen atom is optionally substituted with a fluorine atom.
A liquid crystal composition comprising at least one compound selected from the group consisting of compounds represented by Formula (1) and at least one compound selected from the group consisting of compounds represented by Formulae (2) to (4):
- in Formula (1),
- R1 and R2 independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and in the alkyl group, at least one —CH2— is optionally substituted with —O—, —S—, —CO—, or —SiH2—, at least one —CH2CH2— is optionally substituted with —CH═CH— or —C≡C—, and in these groups, at least one hydrogen atom is optionally substituted with a fluorine atom;
- the ring A1 represents 1,2-cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,3-cyclopentenylene, or 1,4-cyclopentenylene, and in these groups, at least one —CH2— is optionally substituted with —O—;
- the ring N1 represents 1,4-cyclohexylene, decahydronaphthalene-2,6-diyl, or 1,4-phenylene, and in these groups, at least one —CH2— is optionally substituted with —O—, —S—, —CO—, or —SiH2—, at least one —CH2CH2— is optionally substituted with —CH═CH— or —CH—N—, and in these divalent groups, at least one hydrogen atom is optionally substituted with a fluorine atom, a chlorine atom, —C≡N, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2, or —OCH2F;
- Y1 and Y2 independently represent a hydrogen atom, a fluorine atom, a chlorine atom, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2, or —OCH2F;
- n is 0, 1 or 2;
- and
- Z1 and Z2 independently represent a single bond or an alkylene group having 1 to 6 carbon atoms, and in the alkylene group, at least one —CH2— is optionally substituted with —O—, —S—, or —CO—, one or two —CH2CH2—'s are optionally substituted with —CH═CH— or —C≡C—, and in these divalent groups, at least one hydrogen atom is optionally substituted with a fluorine atom;
- and
- in Formulae (2) to (4),
- R11 and R12 independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and in the alkyl and alkenyl groups, at least one —CH2— is optionally substituted with —O—, and in these groups, at least one hydrogen atom is optionally substituted with a fluorine atom;
- the ring B1, the ring B2, the ring B3, and the ring B4 independently represent 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, or pyrimidin-2,5-diyl;
- and
- Z11, Z12, and Z13 independently represent a single bond, —COO—, —CH2CH2—, —CH═CH—, or —C≡C—.
Dependencies are inferred from the claim text.