Liquid crystal composition and liquid crystal display device

1. A liquid crystal composition that has a nematic phase and negative dielectric anisotropy, and contains at least one compound selected from the group of compounds represented by formula (1) as a first component:

wherein, in formula (1), R 1 and R 2 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring A and ring C are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, naphthalene-2,6-diyl, naphthalene-2,6-diyl in which at least one hydrogen is replaced by fluorine or chlorine, chroman-2,6-diyl, or chroman-2,6-diyl in which at least one hydrogen is replaced by fluorine or chlorine; and ring B has the following structure:

wherein, X is sulfur; Y 1 and Y 2 are independently hydrogen, fluorine or trifluoromethyl; Z 1 and Z 2 are independently a single bond, ethylene, carbonyloxy or methyleneoxy; a is 0, 1, 2 or 3; b is 0 or 1; and a sum of a and b is 3 or less.

2. The liquid crystal composition according to claim 1 , wherein a proportion of the first component is in the range of 1% by weight to 30% by weight based on the total amount of the liquid crystal composition.

3. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (2) as a second component:

wherein, in formula (2), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring D and ring E are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,5-difluoro-1,4-phenylene; Z 3 is a single bond, ethylene or carbonyloxy; and c is 1, 2 or 3.

4. The liquid crystal composition according to claim 3 , containing at least one compound selected from the group of compounds represented by formula (2-1) to formula (2-13) as the second component:

wherein, in formula (2-1) to formula (2-13), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkyl having 1 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.

5. The liquid crystal composition according to claim 3 , wherein a proportion of the second component is in the range of 15% by weight to 90% by weight based on the total amount of the liquid crystal composition.

6. The liquid crystal composition according to claim 3 , containing at least one compound selected from the group of compounds represented by formula (3) as a third component:

wherein, in formula (3), R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring F and ring I are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, naphthalene-2,6-diyl, naphthalene-2,6-diyl in which at least one hydrogen is replaced by fluorine or chlorine, chroman-2,6-diyl, or chroman-2,6-diyl in which at least one hydrogen is replaced by fluorine or chlorine; rings G is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl; Z 4 and Z 5 are independently a single bond, ethylene, carbonyloxy or methyleneoxy; d is 1, 2 or 3; e is 0 or 1; and a sum of d and e is 3 or less.

7. The liquid crystal composition according to claim 6 , containing at least one compound selected from the group of compounds represented by formula (3-1) to formula (3-21) as the third component:

wherein, in formula (3-1) to formula (3-21), R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.

8. The liquid crystal composition according to claim 6 , wherein a proportion of the third component is in the range of 10% by weight to 80% by weight based on the total amount of the liquid crystal composition.

9. The liquid crystal composition according to claim 6 , containing at least one polymerizable compound selected from the group of compounds represented by formula (4) as an additive component:

wherein, in formula (4), ring K and ring M are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-2-yl, pyrimidine-2-yl or pyridine-2-yl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring L is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl or pyridine-2,5-diyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; Z 6 and Z 7 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —CO—, —COO— or —OCO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH—, —C(CH 3 )═CH—, —CH═C(CH 3 )— or —C(CH 3 )═C(CH 3 )—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine; P 1 , P 2 and P 3 are independently a polymerizable group; Sp 1 , Sp 2 and Sp 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH— or —C≡C—, and in the group, at least one hydrogen may be replaced by fluorine or chlorine; g is 0, 1 or 2; h, j and k are independently 0, 1, 2, 3 or 4; and a sum of h, h, j and k is 1 or more.

10. The liquid crystal composition according to claim 3 , containing at least one polymerizable compound selected from the group of compounds represented by formula (4) as an additive component:

wherein, in formula (4), ring K and ring M are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-2-yl, pyrimidine-2-yl or pyridine-2-yl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring L is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl or pyridine-2,5-diyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; Z 6 and Z 7 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —CO—, —COO— or —OCO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH—, —C(CH 3 )═CH—, —CH═C(CH 3 )— or —C(CH 3 )═C(CH 3 )—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine; P 1 , P 2 and P 3 are independently a polymerizable group; Sp 1 , Sp 2 and Sp 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH— or —C≡C—, and in the group, at least one hydrogen may be replaced by fluorine or chlorine; g is 0, 1 or 2; h, j and k are independently 0, 1, 2, 3 or 4; and a sum of h, j and k is 1 or more.

11. The liquid crystal composition according to claim 1 , containing at least one polymerizable compound selected from the group of compounds represented by formula (4) as an additive component:

wherein, in formula (4), ring K and ring M are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-2-yl, pyrimidine-2-yl or pyridine-2-yl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring L is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl or pyridine-2,5-diyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; Z 6 and Z 7 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —CO—, —COO— or —OCO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH—, —C(CH 3 )═CH—, —CH═C(CH 3 )— or —C(CH 3 )═C(CH 3 )—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine; P 1 , P 2 and P 3 are independently a polymerizable group; Sp 1 , Sp 2 and Sp a are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH— or —C≡C—, and in the group, at least one hydrogen may be replaced by fluorine or chlorine; g is 0, 1 or 2; h, j and k are independently 0, 1, 2, 3 or 4; and a sum of h, h, j and k is 1 or more.

12. The liquid crystal composition according to claim 11 , wherein, in formula (4), P 1 , P 2 and P 3 are independently a polymerizable group selected from the group of groups represented by formula (P-1) to formula (P-6):

wherein, in formula (P-1) to formula (P-6), M 1 , M 2 and M 3 are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine; and

in formula (4), when all of h pieces of P 1 and k pieces of P 3 are the group represented by formula (P-4), at least one of h pieces of Sp 1 and k pieces of Sp 3 is alkylene having 1 to 10 carbons in which at least one piece of —CH 2 — is replaced by —O—, —COO—, —OCO— or —OCOO—.

13. The liquid crystal composition according to claim 11 , containing at least one polymerizable compound selected from the group of compounds represented by formula (4-1) to formula (4-27) as the additive component:

wherein, in formula (4-1) to formula (4-27), P 4 , P 5 and P 6 are independently a polymerizable group selected from the group of groups represented by formula (P-1) to formula (P-3):

wherein, in formula (P-1) to formula (P-3), M 1 , M 2 and M 3 are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine; and

in formula (4-1) to formula (4-27), Sp 1 , Sp 2 and Sp 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one piece of —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one piece of —CH 2 —CH 2 — may be replaced by —CH═CH— or —C≡C—, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine.

14. The liquid crystal composition according to claim 11 , wherein a proportion of addition of the additive component is in the range of 0.03% by weight to 10% by weight based on the total amount of the liquid crystal composition.

15. A liquid crystal display device, including the liquid crystal composition according to claim 1 .

16. The liquid crystal display device according to claim 15 , wherein an operating mode in the liquid crystal display device is an IPS mode, a VA mode, an FFS mode or an FPA mode, and a driving mode in the liquid crystal display device is an active matrix mode.

17. A polymer sustained alignment mode liquid crystal display device, wherein the liquid crystal display device includes the liquid crystal composition according to claim 1 , or a polymerizable compound in the liquid crystal composition is polymerized.