摘要:
A liquid-crystal composition containing at least one of optically active compounds respectively represented by the following formulae (1) to (4); and a liquid-crystal electrooptic element having excellent display quality. In the formulae, C* is asymmetric carbon and the meanings of the symbols are as shown in the description. (1) R1-A1-C*HX-Y-A?2-(Z1-A3)¿m C-A?4-(Z2-A5)¿n-R?2 (2) R1-A1-C*HX1-Y1-A2-Z1-A3-Z2-A4-R2 (3) R5¿-Pn-C*HX2-CH2-A?6-Y2-A7-R6¿.
摘要:
The present invention relates to mesogenic, cross-linkable mixtures comprising (i) a cross-linkable liquid crystalline host compound comprising at least one cross-linkable liquid crystalline compound, and (ii) at least one chiral or achiral rod shaped additive component, wherein said additive component has a rigid core and comprises at least two fused or linked, optionally substituted, non-aromatic, aromatic, carbocyclic or heterocyclic groups, and also comprises at least one optionally substituted alkyl residue, and at least one polymerizable group and wherein the additive component has a transition temperature to the isotropic state of 40°C or lower. The invention also relates to the novel chiral or achiral rod-shaped additive compounds used for the preparation of these mixtures, to mixtures according to the invention in form of an elastomer, polymer gel, polymer network or polymer film, to polymer networks and liquid crystalline polymer films prepared from these mixtures and to optical or electrooptical components comprising polymer networks and liquid crystalline polymer films prepared from such mixtures. Further, the invention relates to the use of the chiral or achiral rod shaped compounds as components of a cross-linkable liquid crystalline mixture in the production of orientated liquid crystalline polymers, to liquid crystalline mixtures comprising these compounds, to liquid crystalline polymers and liquid crystalline polymer networks prepared from such liquid crystalline mixtures, and to liquid crystalline devices comprising these compounds.
摘要:
An anti-ferroelectric liquid crystal composition comprising substantially a phenyl triester compound of the formula (1), wherein R 1 is a linear alkyl group having 6 to 12 carbon atoms, m is an integer of 0 to 3, n is an integer of 1 to 3, and X 1 is a hydrogen atom or a fluorine atom, and an anti-ferroelectric liquid crystal compound of the formula (2), wherein R 2 is a linear alkyl group having 6 to 12 carbon atoms, X 2 is a hydrogen atom or a fluorine atom, A is -CH 3 or -CF 3, r is 0 or 1 and C* is an asymmetric carbon, provided that when A is -CH 3 , r is 0 and p is an integer of 4 to 10, that when A is -CF 3 and when r is 0, p is an integer of 6 to 8, and further that when A is - CF 3 and when r is 1, q is an integer of 5 to 8 and p is 2 or 4. The present invention provides a novel phenyl triester compound, an anti-ferroelectric liquid crystal composition comprising the above phenyl triester compound is not only improved in response speed but also shows remarkably controlled layer rotation, and it can achieve a simple matrix liquid crystal display device which is free of a change in contrast and is highly reliable in use for a long period of time.
摘要:
A novel ferrielectric liquid crystal compound of the formula (1), wherein R is a linear alkyl group having 6 to 12 carbon atoms, X is a hydrogen atom or a fluorine atom, m is an integer of 1 to 3, n is an integer of 1 to 3, and C* is an asymmetric carbon atom. The ferrielectric liquid crystal compound of the invention characteristically has a ferrielectric phase in a broad temperature range and shows a high speed optical response in spite of a small spontaneous polarization.
摘要:
The present invention provides a ferrielectric liquid crystal compound represented by the following general formula (1), wherein R is a linear alkyl group having of 6 to 12 carbon atoms, X is a hydrogen atom or a fluorine atom, m is an integer of 1 to 3, n is an integer of 1 to 3, and C* is an asymmetric carbon atom. The ferrielectric liquid crystal compound of the present invention has a ferrielectric phase in a broad temperature range and shows a high speed response in spite of a small spontaneous polarization, and accordingly, it is very useful as a practical raw material for liquid crystal display device.