Invention Grant
US08475888B2 Five-ring liquid crystal compound having a nitrogen-containing heterocyclic ring, liquid crystal composition and liquid crystal display device 有权
具有含氮杂环的五环液晶化合物,液晶组合物和液晶显示装置

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.
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