- Partially fluorinated liquid crystal material
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The invention provides LC compositions that exhibit V-shaped switching when aligned in an analog device configuration and exhibit bistability when aligned in a bookshelf-type device configuration. The invention more specifically provides LC compositions of formula 1 and particularly chiral nonracemic compounds of formula 1 which exhibit bistable switching as well as V-shaped switching when aligned in appropriate device configurations. The invention also provides methods of using the compounds of the invention in making LC compositions and electooptical devices comprising an aligned layer of the compositions of this invention.
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- Effect of molecular polarity and conjugated system on antiferroelectricity in AFLC's
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Series of pyrimidine and pyridine analogous compounds have been developed in order to interpret the relationship between stability of antiferroelectricity and the conjugation along the long axis of the molecule. On the appearance of antiferroelectricity,
- Suzuki,Koide,Aihara,Kawamura,Suenaga,Kitazume
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p. 351 - 360
(2007/10/03)
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- Liquid crystal compounds
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A composition of (R)-isomer and (S)-isomer of a liquid crystal compound represented by the formula; STR1 wherein X represents --O-- or a direct bond, Z represents a halogen-substituted alkyl group selected from a group consisting of --CF3, --CH
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- Carboxylate compounds, liquid crystal compositions containing said compounds and liquid crystal element
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In accordance with the present invention, there are provided carboxylate compounds and liquid compositions thereof represented by the following formula (A) STR1 wherein R1 represents one group selected from the group consisting of alkyl group h
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- Carboxylic acid ester compound, liquid crystal material, liquid crystal composition and liquid crystal element
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The carboxylic acid ester compound of the invention is represented by the following formula [I]: STR1 wherein R is an alkyl group of 3-20 carbon atoms; n is 0 or 1; at least one of A1, A2 and A3 is a group having tetralin
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- A convienient synthesis of ferroelectric liquid crystals bearing the trifluoromethyl group
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A practical synthetic route to a series of (R)- or (S)-(1-trifluoromethyl)alkyl 4-hydroxy-benzoates has been developed.These materials were prepared by the reaction of p-hydroxybenzoic acid with (R)- or (S)-1-(trifluoromethyl)alkanols in the presence of p
- Kitazume, Tomoya,Kaneko, Sadanori,Yamazaki, Takashi,Watanabe, Shoji
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p. 135 - 140
(2007/10/02)
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- Component for liquid crystal composition and liquid crystal composition containing the same
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An optically active compound represent by formula (I): STR1 wherein R1 represents a fluoroalkyl group having from 1 to 18 carbon atoms; R2 represents an alkyl group having from 1 to 16 carbon atoms and an aralkyl group having from 6 to 16 carbon atoms; R3 represents C2 F5, CF3, CHF2, or CH2 F; X represents a single bond, --O--, --COO--, or --OCO--; Y represents --COO--, --OCO--, --CH2 O--, or --OCH2 --; Z represents --COO-- or --O--; (A) and (B) each represent a cyclic group; and * indicates an optically active center, and a liquid crystal composition containing at least one of said optically active compounds are disclosed. The compound is useful not only as a liquid crystal compound but as a chiral dopant to provide a liquid crystal composition exhibiting a chiral smectic phase.
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