Liquid crystal composition having negative dielectric anisotropy

A liquid crystal composition, comprising compounds of Formulas I to IV:

• wherein
• in Formula I, R1 and R2 are each selected from a group a or b below, in which:
• a is selected from at least one of C1-C12 alkyl, C1-C12 alkyl substituted with fluoro or chloro, C1-C12 alkoxy, C1-C12 alkoxy substituted with fluoro or chloro, H and —CH═CH2;
• and
• b is a group formed by substituting at least one —CH2— in the group a with at least one of the groups below:
• —CH═CH— and —O—;
• is selected from at least one of 1,4-phenylene, 1,4-phenylene monosubstituted with fluoro or chloro, 1,4-cyclohexyl, and a group formed by substituting one or two —CH2— in 1,4-cyclohexyl with O;
• and
• m is 1 or 2;
• in Formula II, H is cyclopentyl or cyclobutyl;
• is as defined for
• in Formula I;
• Z is selected from at least one of a single bond, —COO—, —CH2—O— and —CH2CH2—;
• R3 is selected from at least one of C1-C6 alkyl or C1-C6 alkoxy;
• and
• n is 1 or 2;
• in Formula III, R4 and R5 are each selected from C2-C12 alkenyl, C2-C12 alkenyl substituted with halo, acrylate, methacrylate, ethenyloxy, propenyloxy, oxiranyl, oxetanyl and ketenyl, and at least one of R4 and R5 is acrylate, methacrylate, ethenyloxy, propenyloxy, oxiranyl, oxetanyl or ketenyl;
• are each selected from a group g or h below, in which:
• g is selected from at least one of 1,4-phenylene, 1,4-phenylene substituted with fluoro, 1,4-cyclohexyl, a group formed by substituting one or two —CH2— in 1,4-cyclohexyl with O or S, 3,7-dibenzofuranyl, 1,4-bicyclo[2,2,2]octylene, piperidin-1,4-diyl, naphthalen-2,6-diyl, decahydronaphthalen-2,6-diyl, 1,2,3,4-tetrahydronaphthalen-2,6-diyl and indan-2,5-diyl;
• and
• h is a group formed by substituting at least one hydrogen in the group g with at least one of the groups below:
• F, Cl, C1-C7 alkyl, C1-C7 alkoxy, C1-C7 alkylcarbonyl, C1-C7 alkoxycarbonyl and C1-C7 alkylcarbonyloxy;
• X1 and X3 are each selected from at least one of —O—, —S—, —OCH2—, —CH2—O—, —CO—, —COO—, —OCO—, —OCO—O—, —CH2CH2—, a single bond, C1-C12 alkylene, a group formed by substituting at least one —CH2— in C1-C12 alkylene with —O—, and C2-C12 alkylene substituted with halo;
• X2 is a single bond, —OCH2—, —CH2—O—, —CO—, —COO—, —OCO—, —OCO—O— or —CH2CH2—;
• d and e are each an integer of 0-3;
• and
• in Formula IV, R6 and IC are each a group j or k, in which:
• j is selected from at least one of C1-C8 alkyl, C1-C8 alkyl substituted with fluoro or chloro, C1-C8 alkoxy and C1-C8 alkoxy substituted with fluoro or chloro, H, —CH═CH2 and —CH═CH—CH3;
• and
• k is a group formed by substituting at least one —CH2— in the group j with at least one of the groups below:
• —CH═CH—, —COO—, —OOC— or —O—;
• is selected from at least one of 1,4-phenylene, 1,4-phenylene substituted with fluoro, 1,4-cyclohexyl, and a group formed by substituting one or two —CH2— in 1,4-cyclohexyl with O;
• Z3 is a single bond, —COO—, —CH2—O—, —CH2CH2— or —CH2—;
• and
• f is 2 or 3.