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 1W9 based on 1 molecule.
| WO/2019/028508 | "COMPOUNDS AS POTENTIAL DYE MOLECULES" |
| WO/2003/006457 | VARIOLIN DERIVATIVES AND THEIR USE AS ANTITUMOR AGENTS |
| JP2024503116 | Substituted pyridotriazine compounds and their uses |
KATO YOSHINORI
KAMIJO YOSHIMI
SAKIKUBO YOSHINARI
TAKEDA YOSHIO
SATO TAKANORI
SANYO COLOR WORKS