| abstract |
The present invention provides a dye for an anisotropic dye film which is achromatic and exhibits high dichroism, a composition containing the same, an anisotropic dye film, and a polarizing element. , a high degree of molecular orientation, and is formed by a wet film-forming method; the composition is used for the anisotropic dye film and contains the dye; the anisotropic dye film contains the dye; the polarizing element The anisotropic dye film is used; the free acid form of the dye is represented by the following formula (I), where A 11 represents (substituted) phenyl, (substituted) naphthyl, (substituted) Aromatic heterocyclic group; B 11 represents a divalent aromatic hydrocarbon group or aromatic heterocyclic group; R 11 and R 22 represent H, OH, (substituted) alkyl, (substituted) phenyl or (substituted) acyl; n' represents 1 or 2; m means 0 or 1. |