| 摘要 |
PURPOSE:The titled novel dyestuff suitable for guest-host type liquid crystal display element, etc., having improved two-tone ratio, etc., shown by a specific formula having a perinone skeleton and a dyestuff skeleton having straight-line rigidity properties, wherein a central perinone skeleton is substituted with a halogen. CONSTITUTION:The aimed dyestuff having a structure shown by the formula (dye 1 and dye 2 are dyestuff skeleton structure containing azo group, azomethine group or ester group, having high cylindrical properties, X is halogen) having a perinone skeleton, a dyestuff skeleton having linear rigidity properties and a halogen-substituted central perinone skeleton. Preferably the halogen element is Br and a bond ratio of the Br is preferably 1-9 based on 1 molecule. |
