Compound having branched alkyl or branched alkenyl, optically isotropic liquid crystal medium and optical element
AssigneesJnc Petrochemical Corporation, Jnc Corporation
InventorsKouki Sagou, Yasuhiro Haseba
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Abstract
A liquid crystal compound with branched alkyl or branched alkenyl as represented by formula (1), a liquid crystal medium (a liquid crystal composition or a polymer/liquid crystal composite material) containing the liquid crystal compound, and an optical element containing the liquid crystal medium are described. In formula (1), R1 is branched alkyl of C3-20 or branched alkenyl of C3-20. The ring A1, A2, A3, A4 or A5 is 1,4-phenylene or 1,3-dioxane-2,5-diyl, for example. Z1, Z2, Z3 and Z4 are independently a single bond or C1-4 alkylene, for example. Y1 is fluorine, for example, m, n and p are independently 0 or 1, and 1≦m+n+p≦3.
Claims65
A compound represented by formula (1),
- wherein in formula (1), R1 is branched alkyl of C3-20 or branched alkenyl of C3-20, and in the branched alkyl or the branched alkenyl, arbitrary —CH2— is optionally replaced by —O—, arbitrary —CH2—CH2— is optionally replaced by —CH═CH—, —CF═CF— or —C≡C—, and arbitrary hydrogen is optionally replaced by fluorine;
- rings A1, A2, A3, A4 and A5 are independently 1,4-phenylene, 1,3-dioxane-2,5-diyl, tetrahydropyran-2,5-diyl, tetrahydropyran-3,6-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl or naphthalene-2,6-diyl, and in these rings arbitrary hydrogen is optionally replaced by fluorine or chlorine, Z1, Z2, Z3 and Z4 are independently a single bond, or C1-4 alkylene in which arbitrary —CH2— is optionally replaced by —O—, —COO—, —OCO— or —CF2O—, arbitrary —CH2—CH2— is optionally replaced by —CH═CH—, —CF═CF— or —C≡C—, and arbitrary hydrogen is optionally replaced by halogen;
- Y1 is fluorine, chlorine, —SF5, —N═C═S, or C1-3 alkyl in which arbitrary hydrogen is replaced by halogen, and in the alkyl arbitrary —CH2— is optionally replaced by —O—, and arbitrary —CH2—CH2— is optionally replaced by —CH═CH— or —C≡C—;
- m, n and p are independently 0 or 1, and 1≦m+n+p≦3.
A liquid crystal composition, comprising a compound represented by formula (1) and a chiral dopant, and exhibiting an optically isotropic liquid crystal phase,
- wherein in formula (1), R1 is branched alkyl of C3-20 or branched alkenyl of C3-20, and in the branched alkyl or the branched alkenyl, arbitrary —CH2— is optionally replaced by —O—, arbitrary —CH2—CH2— is optionally replaced by —CH═CH—, —CF═CF— or —C≡C—, and arbitrary hydrogen is optionally replaced by fluorine;
- rings A1, A2, A3, A4 and A5 are independently 1,4-phenylene, 1,3-dioxane-2,5-diyl, tetrahydropyran-2,5-diyl, tetrahydropyran-3,6-diyl, pyrimidine-2,5-diyl, pyridine-2,5-diyl or naphthalene-2,6-diyl, and in these rings arbitrary hydrogen is optionally replaced by fluorine or chlorine, Z1, Z2, Z3 and Z4 are independently a single bond, or C1-4 alkylene in which arbitrary —CH2— is optionally replaced by —O—, —COO—, —OCO— or —CF2O—, arbitrary —CH2—CH2— is optionally replaced by —CH═CH—, —CF═CF— or —C≡C—, and arbitrary hydrogen is optionally replaced by halogen;
- Y1 is fluorine, chlorine, —SF5, —N═C═S, or C1-3 alkyl in which arbitrary hydrogen is replaced by halogen, and in the alkyl arbitrary —CH2— is optionally replaced by —O— and arbitrary —CH2—CH2— is optionally replaced by —CH═CH— or —C≡C—;
- m, n and p are independently 0 or 1, and 1≦m+n+p≦3.
Dependencies are inferred from the claim text.