Tolane derivatives, liquid crystal compositions containing the d

Details Tolane derivatives, liquid crystal compositions containing the d Tolane derivatives, liquid crystal compositions containing the d

1993-07-21

1994-10-18

Wu, Shean

Compositions

Liquid crystal compositions

25229961, 25229963, 25229967, 558411, 558425, 570127, 359103, C09K 1952, C07C25550, C07C 2524, G02F 113

Patent

active

053565584

ABSTRACT:
A tolane derivative, a liquid crystal composition containing the derivative, and a liquid crystal display device including the composition, in which the tolane derivative is represented by the following general formula: ##STR1## wherein R represents a straight-chain alkyl group having 1 to 10 carbon atoms, and each of X.sub.1, X.sub.2, X.sub.3 and X.sub.4 represents a fluorine atom or a hydrogen atom wherein at least one X represents a fluorine atom, and Y represents a nitrile group or a straight-chain alkyl group having 1 to 10 carbon atoms.
By blending the above-described compound with a general liquid crystal composition, a liquid crystal composition is provided which exhibits a wide practical temperature range as well as a large anisotropy of refractive index.

REFERENCES:
Chemical Abstracts, vol. 95, Dec. 21, 1981, Abstract No. 219871, p. 494.
P. Adomenas et al., "Acetylenic Liquid Crystals Available by Castro Reaction", Advances in Liquid Crystal Research and Applications, 1980, pp. 1029-1038.

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