| abstract |
PROBLEM TO BE SOLVED: To provide a novel optically active compound having an antiferroelectric liquid crystal phase and exhibiting a low threshold value and low viscosity, and exhibiting an antiferroelectric liquid crystal phase but exhibiting a high threshold value. Novel optically active compound which can be added to the antiferroelectric liquid crystal to reduce the threshold value, an antiferroelectric liquid crystal composition containing the compound, and a threshold of the antiferroelectric liquid crystal composition by adding the compound How to reduce the value. SOLUTION: General formula 1 (R 1 and R 2 are alkyl groups, R 3 is fluorine, methyl or trifluoromethyl group, R 4 is methyl group, fluorine or trifluoromethyl group, l, m, p are 0 or 1, X is- (CH 2 ) q —O—, —OCO— or —CO 2 —, Y is —OCO—, —CO 2 — or —O— (CH 2 ) n —, n And q represent 1 or 2. However, when p is 1, X is-(CH 2) If q -O- R 3 is fluorine, Y is -O- (CH 2) n - R 4, if represents fluorine, and p is the case of 0 X is - (CH 2) q -O- or -CO 2 - a, Y is - OCO- or -O- (CH 2) when n not both F and R 3 and R 4. C * is an asymmetric carbon. )) An optically active compound. |