A liquid crystal material includes in solution therewith a pleochroic dye characterised in that the dye is an anthraquinone of general formula:
where R2 is either hydrogen or a hydroxyl group and where R3 is an anilino or substituted or modified anilino group and where R, is hydrogen when R2 is a hydroxyl group and R, is an anilino or substituted or modified anilino group, preferably the same as R3, when R2 is hydrogen. A large number of alternatives for R3 are disclosed.
                            一种液晶材料包括一种多色
染料,其特征在于该
染料是通式如下的
蒽醌
其中 R2 是氢或羟基,R3 是
苯胺基或经取代或修饰的
苯胺基,当 R2 是羟基时,R 是氢,当 R2 是氢时,R 是
苯胺基或经取代或修饰的
苯胺基,最好与 R3 相同。已公开了大量 R3 的替代物。