Solutions containing liquid crystal materials and pleochroic...

Details Solutions containing liquid crystal materials and pleochroic... Solutions containing liquid crystal materials and pleochroic...

C - Chemistry, Metallurgy

09

K

31/105, 345/8

C09K 19/42 (2006.01) C09K 19/60 (2006.01)

Patent

CA 1200376

ABSTRACT A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye wherein the pleochroic dye comprises at least one anthraquinone compound free from water solubilising and ionic substituents and having the formula: Image Formula I wherein: P is OH or NH2; each group XA is independently selected from OH, NO2, SR and NZ1Z2 provided that one group XA is SR and the other group XA is OH, NO2 or NZ1Z2; m is 1 or 2; each group Q1 is independently alkyl; each group R is independently selected from optionally substituted alkyl, aryl and cyclohexyl groups; each of the groups Z1 and Z2 is independently selected from hydrogen, and optionally substituted alkyl, aryl and cycloalkyl groups.

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