| 摘要 |
Liquid crystal display elements were contained in>=1 anthraquinone dye soln. of general structure I(X,Y = -NH2, OH; Z = halogen, -OR, -NHR; R = C1-15 alkyl, substituted methoxy). Thus, NaOH 2.5g was added in phenol 30 G and melted at 100≦̸C. 1-Amino-2-bromo-4-hydroxy anthraquinone was added and reacted for 4 hr at 160≦̸C. The resulting mixt. was cooled, added into a dil. sodium hydroxide soln. Then, it was filtered, washed, dried, and recrystallized to be obtained the desirable products.
|
