| 摘要 |
Liquid-crystal mixture with a pleochroic anthraquinone dye of the general formula <IMAGE> with R1, R3, R4, R6=H, OH, OCH3, NH2, NHCH3, NO2, characterized by the feature that <IMAGE> (R7=H, alkyl, cycloalkyl, alkoxy, alkylmercapto, amino, alkylamino, dialkylamino, nitro, cyano, halogen), <IMAGE> COOR9, CH2-OR9 (R8=H, alkyl, cycloalkyl, alkoxy, alkylmercapto, amino, alkylamino, dialkylamino, nitro, cyano, halogen); R9=H, alkyl and either R1, R4=H, OH, NH2, NHCH3, NO2, NHCH3, NO2, OCH3, where at least one of the two radical is an NH2 or an NHCH3, R3=R6=H, or R3, R6=H, OH, NH2, NHCH3, NO2, OCH3, where at least one of the two radicals is an NH2 or an NHCH3, R1=R4=H.
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