Liquid crystal composition and liquid crystal display device using the same
There is provided a liquid crystal composition which is suitably used in a liquid crystal display device without impairment of properties inherent in liquid crystal display devices. There is provided a liquid crystal display device in which such a liquid crystal composition is used. There is provided a liquid crystal composition having a negative dielectric anisotropy and containing a compound represented by Formula (I-1) and at least one compound represented by General Formula (II) and also provided a liquid crystal display device in which such a liquid crystal composition is used.
1. A liquid crystal composition having a negative dielectric anisotropy, the liquid crystal composition comprising:
a compound represented by Formula (I-1);
at least one compound represented by General Formula (II);
a compound represented by Formula (IVb-1);
a compound represented by Formula (IIIb-1), and
a compound represented by Formula (V-5-1),
wherein in the General Formula (II), R 1 represents an alkyl group having 2 to 5 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.
2. The liquid crystal composition according to claim 1 , wherein R 1 in General Formula (II) is an ethyl group.
3. The liquid crystal composition according to claim 1 , further comprising one or two compounds selected from the group consisting of compounds represented by Formulae (I-2) and (I-3)
4. The liquid crystal composition according to claim 1 , wherein the amount of the compound represented by Formula (I-1) is in the range of 10 to 23 mass %.
5. The liquid crystal composition according to claim 1 , further comprising a compound represented by General Formula (III)
where R 3 and R 4 each independently represent an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms; at least one hydrogen atom of the alkyl group, alkenyl group, alkoxy group, and/or alkenyloxy group is optionally substituted with a fluorine atom; the methylene group of the alkyl group, alkenyl group, alkoxy group, and/or alkenyloxy group is optionally substituted with an oxygen atom provided that the oxygen atom is not bonded to another oxygen atom in series or substituted with a carbonyl group provided that the carbonyl group is not bonded to another carbonyl group in series; A′ represents a 1,4-cyclohexylene group, or a tetrahydropyran-2,5-diyl group.
6. The liquid crystal composition according to claim 1 , further comprising a compound represented by General Formula (IV)
where R 5 and R 6 each independently represent an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms; at least one hydrogen atom of the alkyl group, alkenyl group, alkoxy group, and/or alkenyloxy group is optionally substituted with a fluorine atom; the methylene group of the alkyl group, alkenyl group, alkoxy group, and/or alkenyloxy group is optionally substituted with an oxygen atom provided that the oxygen atom is not bonded to another oxygen atom in series or substituted with a carbonyl group provided that the carbonyl group is not bonded to another carbonyl group in series; A 2 represents a 1,4-cyclohexylene group, a 1,4-phenylene group, or a tetrahydropyran-2,5-diyl group; in the case where A 2 represents a 1,4-phenylene group, at least one hydrogen atom of the 1,4-phenylene group is optionally substituted with a fluorine atom; and the compound represented by General Formula (IV) excludes the compound represented by Formula (IVb-1).
7. The liquid crystal composition according to claim 1 , further comprising a compound represented by General Formula (V)
where R 7 and R 8 each independently represent an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms; at least one hydrogen atom of the alkyl group, alkenyl group, alkoxy group, and/or alkenyloxy group is optionally substituted with a fluorine atom; the methylene group of the alkyl group, alkenyl group, alkoxy group, and/or alkenyloxy group is optionally substituted with an oxygen atom provided that the oxygen atom is not bonded to another oxygen atom in series or substituted with a carbonyl group provided that the carbonyl group is not bonded to another carbonyl group in series;
A 3 represents a 1,4-cyclohexylene group, a 1,4-phenylene group, or a tetrahydropyran-2,5-diyl group; in the case where A 3 represents a 1,4-phenylene group, at least one hydrogen atom of the 1,4-phenylene group is optionally substituted with a fluorine atom;
Z 1 represents a single bond, —CH 2 CH 2 —, —OCH 2 —, —OCF 2 —, —CH 2 O—, or —CF 2 O—;
n represents 0 or 1; and
X 1 to X 6 each independently represents a hydrogen atom or fluorine atom, and at least one of X 1 to X 6 represents a fluorine atom.
8. The liquid crystal composition according to claim 1 , further comprising a reactive monomer.
9. A liquid crystal display device comprising the liquid crystal composition according to claim 1 .
10. A liquid crystal display comprising the liquid crystal display device according to claim 9 .
11. The liquid crystal composition according to claim 1 , further comprising a compound represented by a compound represented by formula (IIIa-1),