1190955-70-4Relevant articles and documents
TETRACYCLIC LIQUID CRYSTALLINE COMPOUND HAVING LATERAL FLUORINE, LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY ELEMENT
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, (2011/04/25)
The invention provides a liquid crystal compound which has stability to heat, light and so forth, a nematic phase in a wide temperature range, a small viscosity, a large optical anisotropy, and a suitable elastic constant K33, and further has a suitable and negative dielectric anisotropy and an excellent compatibility with other liquid crystal compounds. Moreover, the invention provides a liquid crystal composition comprising this liquid crystal compound and a liquid crystal display device containing this liquid crystal composition. A liquid crystal compound represented by formula (a): for example, R1 and R2 are alkyl having 1 to 10 carbons, alkenyl having 2 to 10 carbons or alkoxy having 1 to 9 carbons; ring A1 and ring A2 are 1, 4-phenylene or trans-1, 4-cyclohexylene; L1 and L2 are hydrogen or fluorine, and at least one of L1 and L2 is fluorine; and Z1 and Z2 are a single bond, -(CH2)2-, -CH=CH-, -CH2O- or -OCH2-.