Liquid crystal composition and liquid crystal display including the same

A liquid crystal composition, comprising:

• at least one difunctional compound selected from the group consisting of difunctional compounds represented by Formulae (1) and (2), and
• at least one monofunctional compound selected from the group consisting of monofunctional compounds represented by Formulae (3) and (4),
• wherein
• X1 to X6, Y1 to Y6, and W1 to W6 are each, independently of one another, selected from the group consisting of hydrogen, hydroxyl, halogen, a C1-C15 straight alkyl group, a C3-C15 branched alkyl group, a C2-C15 straight alkenyl group, a C3-C15 branched alkenyl group, a C2-C15 straight alkynyl group, and a C4-C15 branched alkynyl group, wherein each of said C1-C15 straight alkyl group, said C3-C15 branched alkyl group, said C2-C15 straight alkenyl group, said C3-C15 branched alkenyl group, said C2-C15 straight alkynyl group, and said C4-C15 branched alkynyl group is unsubstituted or substituted with at least one radical selected from the group consisting of halogen and hydroxyl, and at least one —CH2— group in each of said C1-C15 straight alkyl group, said C3-C15 branched alkyl group, said C2-C15 straight alkenyl group, said C3-C15 branched alkenyl group, said C2-C15 straight alkynyl group, and said C4-C15 branched alkynyl group is optionally replaced with a ring radical;
• Z1 to Z4 are each, independently of one another, selected from the group consisting of a single bond and a spacer group;
• Z5 and Z6 are each, independently of one another, selected from the group consisting of a single bond, a C1-C15 straight alkylene group, a C3-C15 branched alkylene group, a C2-C15 straight alkenylene group, and a C3-C15 branched alkenylene group, wherein each of said C1-C15 straight alkylene group, said C3-C15 branched alkylene group, said C2-C15 straight alkenylene group, and said C3-C15 branched alkenylene group is unsubstituted or substituted with at least one halogen atom, and at least one —CH2— group in each of said C1-C15 straight alkylene group, said C3-C15 branched alkylene group, said C2-C15 straight alkenylene group, and said C3-C15 branched alkenylene group is optionally replaced with a first divalent radical selected from the group consisting of —O—, —CO—, —COO—, and —OCO—, with the proviso that when at least two of said —CH2— groups are replaced with said first divalent radicals, said first divalent radicals are not bonded to each other directly;
• Z7 and Z8 are each, independently of one another, selected from the group consisting of a single bond, —COO—, —OCO—, —C≡C—, a C1-C12 straight alkylene group, a C3-C12 branched alkylene group, a C2-C12 straight alkenylene group, and a C3-C12 branched alkenylene group, wherein each of said C1-C12 straight alkylene group, said C3-C12 branched alkylene group, said C2-C12 straight alkenylene group, and said C3-C12 branched alkenylene group is unsubstituted or substituted with at least one halogen atom, and at least one —CH2— group in each of said C1-C12 straight alkylene group, said C3-C12 branched alkylene group, said C2-C12 straight alkenylene group, and said C3-C12 branched alkenylene group is optionally replaced with a —O— radical, with the proviso that when at least two of said —CH2— groups are replaced with said —O— radicals, said —O— radicals are not bonded to each other directly;
• P1 to P3, A1, and A2 are each, independently of one another, selected from the group consisting of 1,4-phenylene, 1,4-cyclohexylene, 1,4-cyclohexenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, 1,3-dioxane-2,5-diyl, benzofuran-2,5-diyl, tetrahydropyran-2,5-diyl, a divalent trioxa-bicyclo[2.2.2]octyl functional group, a divalent dioxa-bicyclo[2.2.2]octyl functional group, and indane-2,5-diyl, each of which is unsubstituted or substituted with at least one radical selected from the group consisting of a C1-C8 alkyl group, a C1-C8 haloalkyl group, a C1-C8 alkoxyl group, halogen, a cyano group, and a nitro group;
• M1 is selected from the group consisting of —CH2—, —C(CH3)2—, —C(CF3)2—, —SiH2—, —Si(CH3)2—, and —Si(CF3)2—;
• L1 to L3 are each, independently of one another, selected from the group consisting of hydrogen, F, Cl, CN, a C1-C12 straight alkyl group, a C3-C12 branched alkyl group, a C2-C12 straight alkenyl group, a C3-C12 branched alkenyl group, a C2-C12 straight alkynyl group, and a C4-C12 branched alkynyl group, wherein each of said C1-C12 straight alkyl group, said C3-C12 branched alkyl group, said C2-C12 straight alkenyl group, said C3-C12 branched alkenyl group, said C2-C12 straight alkynyl group, and said C4-C12 branched alkynyl group is unsubstituted or substituted with at least one halogen atom, and at least one —CH2— group in each of said C1-C12 straight alkyl group, said C3-C12 branched alkyl group, said C2-C12 straight alkenyl group, said C3-C12 branched alkenyl group, said C2-C12 straight alkynyl group, and said C4-C12 branched alkynyl group is optionally replaced with said first divalent radical selected from the group consisting of —O—, —CO—, —COO—, and —OCO—, with the proviso that when at least two of said —CH2— groups are replaced with said first divalent radicals, said first divalent radicals are not bonded to each other directly;
• R1 and R2 are each, independently of one another, selected from the group consisting of hydrogen, a C1-C70 straight alkyl group, a C3-C70 branched alkyl group, a C2-C70 straight alkenyl group, a C3-C70 branched alkenyl group, a C2-C70 straight alkynyl group, and a C4-C70 branched alkynyl group, wherein each of said C1-C70 straight alkyl group, said C3-C70 branched alkyl group, said C2-C70 straight alkenyl group, said C3-C70 branched alkenyl group, said C2-C70 straight alkynyl group, and said C4-C70 branched alkynyl group is unsubstituted or substituted with at least one halogen atom, and at least one —CH2— group in each of said C1-C70 straight alkyl group, said C3-C70 branched alkyl group, said C2-C70 straight alkenyl group, said C3-C70 branched alkenyl group, said C2-C70 straight alkynyl group, and said C4-C70 branched alkynyl group is optionally replaced with said first divalent radical selected from the group consisting of —O—, —CO—, —COO—, and —OCO—, with the proviso that when at least two of said —CH2— groups are replaced with said first divalent radicals, said first divalent radicals are not bonded to each other directly;
• n is an integer ranging from 1 to 3, provided that when n is 2 or 3, a plurality of P1s are the same or different and a plurality of M1s are the same or different;
• m is an integer ranging from 0 to 3, provided that when m is 2 or 3, a plurality of Pas are the same or different;
• and
• t is an integer ranging from 1 to 2, provided that when t is 2, two A1s are the same or different and two Z7s are the same or different.