Liquid crystal compounds

Details Liquid crystal compounds Liquid crystal compounds

1992-06-30

1995-06-13

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

560102, 25229966, C09K 1912, C07C 6976

Patent

active

054240050

ABSTRACT:
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 --CF.sub.3, --CHF.sub.2, --CH.sub.2 F, --C.sub.2 F.sub.5, --CClF.sub.2, -CCl.sub.2 F, --CCl.sub.2 CF.sub.3, and --C.sub.3 F.sub.7, m represents an integer of from 1 to 20, n represents an integer of from 1 to 20, and * represents an asymmetric carbon, and the optical purity of said composition is high enough to exhibit optically tristable states in S*(3) phase when electric voltage is applied.

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H. Tanguchi et al, "Electrical and optical Properties of Florinated Ferroelectric liquid Crystal", Japanese Journal of Applied Physics, vol. 26, Part 1, Supplement 26-2, 1987, pp. 101-103.
K. Yoshino et al, "Florinated Ferroelectric Liquid Crystal and its Dielectric Property", Chemistry Express, vol. 2, No. 1, 1987, pp. 53-56.

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