US 8,475,888 B2 · Five-ring liquid crystal compound having a nitrogen-containing heterocyclic ring, liquid crystal composition and liquid crystal display device

Abstract

Provided is a liquid crystal compound having general physical properties necessary for a compound, stability to heat, light or the like, a wide liquid crystal phase temperature range, a high clearing point, an excellent compatibility with other liquid crystal compounds, a large refractive index anisotropy and a large dielectric anisotropy. Provided are a liquid crystal composition including the liquid crystal compound, and a liquid crystal display device containing the liquid crystal composition. The compound is represented by formula (1): wherein, for example, R1 is alkyl having 1 to 20 carbons; at least one of the rings A1 to A6 is pyrimidine-2,5-diyl or pyridine-2,5-diyl and the others are 1,4-cyclohexylene or 1,4-phenylene; Z1 to Z6 are a single bond; L1 to L4 is hydrogen or halogen; X1 is hydrogen, halogen, —C≡N or alkyl having 1 to 10 carbons; and l, m, n, o, p and q are 0 or 1 and l+m+n+o+p+q=3.

Claims16

Dependent claims

A compound represented by any one of formulas (1-1) to (1-3):

wherein R1 is alkyl having 1 to 15 carbons, alkenyl having 2 to 15 carbons, alkoxy having 1 to 15 carbons or alkenyloxy having 2 to 15 carbons;
the ring A1 is pyrimidine-2,5-diyl;
the ring A2, the ring A3, the ring A4 and the ring A5 are independently 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1,4-phenylene, or 1,4-phenylene in which arbitrary hydrogen is replaced by halogen;
Z1, Z2, Z3, Z4 and Z5 are independently a single bond, —CH2CH2—, —CH═CH—, —C≡C—, —COO—, —CF2O—, —CH2O— or —OCH2—;
L1, L2, L3 and L4 are independently hydrogen or fluorine;
and X1 is fluorine, chlorine, —C≡N, —CF3, —CHF2, —CH2F, —OCF3, —OCHF2 or —OCH2F.

3 more elements

Dependencies are inferred from the claim text.

Five-ring liquid crystal compound having a nitrogen-containing heterocyclic ring, liquid crystal composition and liquid crystal display device

Life of this patent

Five-ring liquid crystal compound having a nitrogen-containing heterocyclic ring, liquid crystal composition and liquid crystal display device

Life of this patent

Abstract

Claims16