| abstract |
(57) [Abstract] A red-colored dark compound having the general formula (I) (wherein R 1 is H, NR 2 R 3 , OR 4 , SR 4 or R 7 , and R 2 and R 3 are R 4 is the same as R 1 or an alkyl, perhaloalkyl, aryl or heteroaryl group; or R 7 is an alkyl or carbocyclic group or forms a heterocycle with the nitrogen atom to which they are attached. , haloalkyl, alkylthio, aryl, arylthio, heteroaryl, halogen, nitrile, be a carboxylate, ester, nitro, or f, gh, i, carbocyclic or heterocyclic ring fused to the surface of the j or k; R 5 is a cyclic An aminoaryl group, an indolinoaryl group, a tricyclic nitrogen heterocycle, or an unsaturated cyclic aminoaryl group. |