摘要:
An optically liquid crystalline compound having an extremely large spontaneous polarization value and a chiral smectic liquid crystal composition containing the compound are provided, the compound being expressed by the formula wherein m represents an integer of 2 to 18; t represents an integer of 0 to 12; n represents 0 or 1; R represents an alkyl group or an alkoxy group each of 2 to 20 carbon atoms, a halogen atom or cyano group; and A and B each represent a single bond, wherein X represents hydrogen atom, a halogen atom or cyano group, and a chiral smectic liquid crystal composition containing at least one kind of the above compound.
摘要:
Liquid crystal compounds exhibiting smectic phases and useful for display elements have the formula: in which R 1 and R 2 are each a C 1 -C 20 alkyl group and X is a hydrogen or fluorine atom. A chiral smectic liquid crystal composition comprises at least one compound of formula (I) together with an optically active compound.
摘要:
α-hydroxyketone derivatives represented by the general formula (I) which are novel optically active compounds; liquid crystal compositions, such as chiral smectic or chiral nematic compositions, containing the derivatives; and liquid crystal devices using the compositions. General Formula (I) wherein A and B are independently a radical represented by the general formula (II): wherein R 2 is an aliphatic hydrocarbon having 1 to 16 carbon atoms, which may contain -0- and may be substituted by a cyano group and/or a halogen atom, are independently a single bond, etc., X and Y are independently a single bond, or -CH 2 CH 2 -, etc., or an aliphatic hydrocarbon having 1 to 16 carbon atoms; R 1 is an alkyl group, a phenyl group, or a cyclohexyl group; n is 0 or 1; and the asterisk ( * ) indicates an asymmetric carbon atom.