摘要:
A liquid crystal composition comprising a host liquid crystal material and at least one guest novel anthraquine dye dissolved in said host liquid crystal material has a high order parameter, sufficient solubility in the host liquid crystal and high stability.
摘要:
Phthalonitrile derivatives are represented by the formula (I): wherein X and Y each represents a C1-9 alkyl or alkoxy group, The compounds are prepared by cyclisation reaction of a butadiene derivative X-CH=CH-CH-CH-Y with fumaronitrile or dicycanoacetylene, followed by oxidation or bromination. The compounds have a large negative dielectric anis- tropy, and wide liquid crystal range, and are useful, alone or with other liquid crystals, in liquid crystal display devices.
wherein R represents H, or a halogen atom, where m is an integer of 1 to 9 and n is 0, 1 or 2, but at least one of X and Y does not represents a methyl group, and Y does not represent an alkyl or alkoxy group when X represents and R' represents an alkyl group.
摘要:
Anthraquinone dyes are of the general formula: wherein R is a trans-4-alkylcyclohexyl, trans-4-cyclohexyl- cyclohexyl, trans-4-alkylcyclohexylcyclohexyl, p-(trans-4--alkylcyclohexyl)phenyl or alkyl, aralkyl or aryl group each of which may be substituted with specified organic groups; and R 2 is an alkyl, cycloalkyl, aralkyl or aryl group each of which may be substituted with specified organic groups; with provisos as to the values of R 1 and R 2 together. The dyes have a cyan color and excellent order parameter, solubility and stability. In an electro-optic cell, a liquid crystal composition (9) containing the dye is interposed between two facing electrode plates (8) and permits the realization of good color displays utilizing the guest-host effect of a liquid crystal.
摘要:
Pleochroic azo dyes represented by the formula (I): wherein X represents group -OCOR 1 or -COOR' (wherein R 1 represents an alkyl group, an alkoxyalkyl group, an alkoxyphenyl group, an alkylcyclohexyl group, an alkoxyalkylcyclohexyl group, a cycloalkylcyclohexyl group, an alkoxycyclohexyl group, or a phenyl group substituted by a substituent selected from among an alkyl group containing 3 to 18 carbon atoms, an alkoxyalkyl group, a cycloalkyl group, an aryl group, a cyano group, a halogen atom, an acyloxy group, a carboxylic acid ester group, and an arylazo group); Y represents a hydrogen atom, an alkyl group, an alkoxyalkyl group, a cycloalkyl group, an alkoxy group, a nitro group, a cyano group, a carboxylic acid ester group, an acyloxy group, an alkylsulfonyl group, an aryl group, a halogen atom, or group wherein R 2 and R 3 each represents a hydrogen atom, an alkyl group, an alkoxyalkyl group, or R 2 and R 3 may be connected to each other to form a nitrogen-containing ring together with the adjacent nitrogen atom; Z' to Z 9 each represents a hydrogen atom, a halogen atom, a methyl group, a hydroxy group, a methoxy group or a cyano group, or Z 1 , Z 2 and Z 3 may be connected to R 2 or R 3 to form a nitrogen-containing ring, or Z 1 and Z 2 , Z' and Z 5 , or Z 7 and Z 8 may be connected to each other to form an aromatic ring; at least one of
and n represents 0, 1 or 2, a liquid crystal composition containing the pleochroic azo dyes and a display device using the liquid crystal composition.
摘要:
Phthalonitrile derivatives are represented by the formula (I): wherein X and Y each represents a C1-9 alkyl or alkoxy group, The compounds are prepared by cyclisation reaction of a butadiene derivative X-CH=CH-CH-CH-Y with fumaronitrile or dicycanoacetylene, followed by oxidation or bromination. The compounds have a large negative dielectric anis- tropy, and wide liquid crystal range, and are useful, alone or with other liquid crystals, in liquid crystal display devices. wherein R represents H, or a halogen atom, where m is an integer of 1 to 9 and n is 0, 1 or 2, but at least one of X and Y does not represents a methyl group, and Y does not represent an alkyl or alkoxy group when X represents and R' represents an alkyl group.
摘要:
Anthraquinone dyes are of the general formula: … … where R x C1-9 alkyl; alkoxyalkyl, (substituted)phenyl or -O-CH2- or -O-CH2- (substituted) phenyl, and R = C1-18 alkyl, alkoxyalkyl, furfuryl, aralkyl or allyl. … The synthesis uses reagents HS-R and HO-R on an anthraquinone dye. … Suitable host liquid crystals are described, and an electro-optic cell in which the crystal compositions is used. … The dyes shown have maximum absorptions of 580-602 nm and have good order parameter, allowing bright display.