| 摘要 |
An antiferroelectric liquid crystal composition comprising a liquid crystal composition having the chiralsmectic CA phase and a compound represented by the formula (I) shown below: <IMAGE> (I) wherein X is -CH3, -CF3 or -C2H5; R1 and R2 are straight-chain or branched alkyl radicals having 3 to 14 and 3 to 10 carbon atoms respectively; Y represents a single bond, or -O-, -CO-, -COO- or -OCO- radical; Z represents -COO-, -C 3BOND C- or -CH2CH2- radical; and A1, A2 and A3 independently represent a six membered ring including benzene rings, cyclohexane rings, pyridine rings, and pyrimidine rings, at least one hydrogen of which six membered rings may be replaced by a fluorine atom, chlorine atom, bromine atom, cyano group, nitro group, methyl group, ethyl group or methoxy group.
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