The present invention discloses a compound of which a structural formula thereof is represented as the following formula

The compound disclosed by the present invention can be used as a liquid crystal compound and overcomes the problem that solubility of the traditional dibenzothiophene-class liquid crystals is poor, and thus can be better applied to the liquid crystal material field. The present invention further discloses a liquid crystal medium containing the compound and an application thereof.

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A compound has an excellent rate of change in HTP caused by exposure. A liquid crystal composition is formed of the compound. A cured product, an optically anisotropic body, and a reflective film can be obtained by curing the liquid crystal composition. The compound is represented by General Formula (1): ##STR00001##

The invention relates to novel compositions comprising at least two anisotropic compounds of formula ##STR00001##
as well as to liquid crystalline networks, films and electro-optical devices comprising the compositions.

Provided are a reactive mesogen that may improve display quality of a liquid crystal display, and a liquid crystal composition including the same. The reactive mesogen is represented by the following Formula:

BZ.sub.1.sub.b1XZ.sub.2.sub.b2Pa where X, Z1, Z2, B, and Pa are specified in the disclosure, and each of b1 and b2 is independently an integer between 0 to 6, inclusive.

The invention relates to a liquid-crystalline medium comprising at least one compound of the formula I, ##STR00001##
in which R.sup.1 has the meanings indicated in Claim 1, and to the use thereof in liquid-crystalline media and in electro-optical liquid-crystal displays.

Disclosed are liquid crystal compounds of cycloalkyl-containing dibenzofuran derivatives, a preparation method therefor and use thereof. The compounds are as represented by formula I. In the molecular structures of the compounds of formula I provided by the present invention, liquid crystal compounds of cycloalkyl terminal group-containing dibenzofuran derivatives, compared with those having flexible alkyl chains as terminal groups, exhibit better intersolubility, and thus the use of a compound as represented by formula I provided by the present invention can improve the intersolubility of a liquid crystal compound and extend the application range of a liquid crystal mixture, producing an important application value. ##STR00001##

Liquid-crystalline (LC) media having positive dielectric anisotropy and liquid-crystal displays (LCDs) containing these media, especially displays addressed by an active matrix and in particular energy saving LC displays of the TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, SA-HB-FFS, SA-XB-FFS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA type. The media have an improved long-term stability against UV radiation and elevated temperatures.

A polymerizable compound has a practical low melting point, excellent solubility in a general-purpose solvent, and can produce an optical film at low cost, exhibits low reflected luminance, and achieves uniform conversion of polarized light over a wide wavelength band, an optically anisotropic article.

A polymerizable compound has a practical low melting point, excellent solubility in a general-purpose solvent, and can produce an optical film at low cost, exhibits low reflected luminance, and achieves uniform conversion of polarized light over a wide wavelength band, an optically anisotropic article. A carbonyl compound is useful as a raw material for producing the polymerizable compound. (In the formula (I), Y.sup.1 to Y.sup.8 represent C(O)O, G.sup.1 and G.sup.2 represent a C.sub.1-20 divalent linear aliphatic group, Z.sup.1 and Z.sup.2 represent a C.sub.2-10 alkenyl group that is unsubstituted, or substituted with a halogen atom, A.sup.x represents a C.sub.2-30 organic group with at least one aromatic ring, A.sup.y represents a hydrogen atom or C.sub.1-20 alkyl group, A.sup.1 represents a trivalent aromatic group, A.sup.2 and A.sup.3 represent a C.sub.3-30 divalent alicyclic hydrocarbon group, A.sup.4 and A.sup.5 represent a C.sub.6-30 divalent aromatic group or the like, and Q.sup.1 represents a hydrogen atom.) ##STR00001##

The present invention relates to polymers that include residues of at least one monomer represented by the following Formula (I). With reference to Formula (I), at least one of E1 and E2 independently is, or is independently substituted with, at least one reactive group, such as a (meth)acryloyl group. Monomers represented by Formula (I) and monomer residues thereof have alignment properties, such as photoalignment properties. The present invention also relates to alignment layers that include such polymers, and articles of manufacture, such as optical elements, that include one or more such alignment layers.

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