Optically active cyano-biphenyl compounds and liquid crystal mat

Details Optically active cyano-biphenyl compounds and liquid crystal mat Optically active cyano-biphenyl compounds and liquid crystal mat

1976-08-20

1978-03-07

Schafer, Richard E.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

252299, 260465C, 350154, 350350, C09K 334, G02F 113, G01K 1116

Patent

active

040772608

ABSTRACT:
Liquid crystal compounds are disclosed having the formula ##STR1## where p is an integer having a value from 0 to 5 inclusive. These materials are optically active and cholesterogenic and may be used in an electro-optical display device either on their own or in admixture with nematogenic materials having a formula ##STR2## where i has a value from 0 to 5 inclusive and j is 0 or 1. These last mentioned mixtures may be thermochromic and employed in a temperature sensing device.

REFERENCES:
patent: 3597044 (1971-08-01), Castellano
patent: 3642348 (1972-02-01), Wysocki et al.
patent: 3680950 (1972-08-01), Haas et al.
patent: 3704056 (1972-11-01), Wysocki et al.
patent: 3833287 (1974-09-01), Taylor et al.
patent: 3947375 (1976-03-01), Gray et al.
patent: 3960751 (1976-06-01), Moriyama et al.
patent: 3974087 (1976-08-01), Gray et al.
patent: 4032219 (1977-06-01), Constant et al.
patent: 4035056 (1977-07-01), Coates et al.
Gray, G. W. et al., Liquid crystals & Plastic Crystals, vol. 1, Ellis Horwood Ltd., London, pp. 142-143 (1974).
Gray, G. W. et al., Electronics Letters, vol. 9, No. 26, pp. 616-617 (Dec. 1973).

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