an n-type naphthalene derivatives novel liquid crystal compound and a liquid crystal composition containing the same

摘要

PROBLEM TO BE SOLVED: To obtain a new compound of a specific naphthalene derivative, useful for preparing a liquid crystal composition having a wide temperature range for a nematic phase, and a small anisotropy in refraction index, capable of being driven at a low voltage and rapidly responding, and suitable for driving an STN and a TFT. ;SOLUTION: This new compound is the one of compounds represented by the formula [(a) is 0 or 1; ring A and ring B in the case of (a) is 1, are each trans-1,4-cyclohexylene, or the like; L, and M when (a) is 1, are each COO, or the like; X1 to X6 are each H or F; when X1 to X6 are each H and (a) is 0, R1 and/or R2 is a 1-20C (substituted) alkyl or the like, L is CF2O, or the like or ring A is 1,2,3,4-tetrahydronaphthalen-2,6-diyl, or the like; when X1 to X6 are each H and (a) is 1, R1 and/or R2 is a 1-20C (substituted) alkyl, or the like, L and/or M is CF2O, or the like, or L and M are each single bond; when X1 is F, X2 to X6 are each H and when (a) is 0, L is COO, or the like], e.g. 1-fluoro-2-propyl-6-(trans-4-propylcylohexyl)naphthalene.;COPYRIGHT: (C)2001,JPO