Liquid crystal substances for the guest-host effect

Details Liquid crystal substances for the guest-host effect Liquid crystal substances for the guest-host effect

1984-04-13

1986-07-22

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing pleochroic dye

2522995, 25229961, 350349, 350350R, 350350S, 534577, 544179, 544359, C09K 334, G02F 113, C07D25708, C07D25712

Patent

active

046018468

ABSTRACT:
The invention relates to liquid crystal compounds for the guest-host effect having a positive contrast, pure red color and exhibiting excellent stability. The compounds herein are derivatives of tetrazine of the general formula: ##STR1## in which m and n are 1 to 10. Other related compounds, mixtures and compositions thereof, and opto-electronic displays are described also.

REFERENCES:
patent: 4311610 (1982-01-01), Zaschke et al.
patent: 4356103 (1982-10-01), Schubert et al.
patent: 4358393 (1982-11-01), Zaschke et al.
patent: 4358589 (1982-11-01), Schubert et al.
patent: 4438268 (1984-03-01), Zaschke et al.
patent: 4490305 (1984-12-01), Eidenschink et al.
Werbel, L. M., et al., J. Heterocyclic Chem., vol. 16, pp. 881-894 (Jul. 1979).
Demus, D., et al., Mol. Cryst. Liq. Cryst., vol. 56 (Letters), pp. 115-121 (1979).
Zaschke, H., et al., "Synthesis and Properties of Liquid Crystalline Heterocycloalkanes", Liq. Cryst. & Ordered Fluids, vol. 4, pp. 75-87, Plenum Press, N.Y., 1984, Reporting Proceedings of ACS Mar. 29-Apr. 1, 1982 in Las Vegas, Nevada.
Karamysheva, L. A., et al., Advances in Liquid Crystal Research and Applications, Ed. Bata, L., Pergamon Press, Oxford, pp. 997-1002 (1980).

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