TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): 3,4:9,10-tetracarboxylic-acid dianhydride is reacted with sulfuric acid, iodine and bromine to obtain 1,7-dibromo perylene 3,4:9,10-tetracarboxylic-acid dianhydride. The obtained 1,7-dibromo perylene 3,4:9,10-tetracarboxylic-acid dianhydride is reacted with an amine of formula: R2-NH2 (a) to obtain N,N'-(R2)2-1,7-dibromo perylene 3,4:9,10-tetracarboxylic-acid bisimide of formula (b). The obtained N,N'-(R2)2-1,7-dibromo perylene 3,4:9,10-tetracarboxylic-acid bisimide (b) is reacted with pyrrolidone to obtain N,N'-(R2)2-1,7-(R1)2 perylene 3,4:9,10-tetracarboxylic-acid bisimide of formula (c). The obtained N,N'-(R2)2-1,7-(R1)2 perylene 3,4:9,10-tetracarboxylic-acid bisimide (c) is reacted with an alkali is presence of an alcohol to obtain N-substituted-1,7-(R1)2 perylene 3,4:9,10-tetracarboxylic-acid-3,4-anhydride-9,10-imide of formula (d). The obtained N-substituted-1,7-(R1)2 perylene 3,4:9,10-tetracarboxylic-acid-3,4-anhydride-9,10-imide (d) is reacted with amine of formula: R3-phenyl-NH2 (e) to obtain perylene derivative of formula (3). Preferred Compound: The perylene derivative (1) is of formula (2).R5=N-pyrrolidyl, N-piperidyl, N-morpholyl, phenyl, naphthyl or pyridyl;R6=halogen, 1-20C alkyl, 1-20C haloalkyl, silyl substituted by 1-20C alkyl or 1-20C haloalkyl, amino group substituted by 1-20C alkyl or monocyclic or polycyclic amino group;andR7=-COOH, -OH, -NH2, -SO3H or -SH. Preferred Definitions:    R1=N-pyrrolidyl, N-piperidyl, N-morpholyl, phenyl, naphthyl or pyridyl;    R2=cyclohexyl or phenyl, preferably phenyl substituted by 1-4C alkyl in ortho position;    R4,R7=-COOH;and    R6=1-4C alkyl.    SPECIFIC COMPOUNDS - 10 perylene derivatives are disclosed. E.g. Perylene derivative of formula (A), perylene derivative of formula (B'), perylene derivative of formula (C'), N-(4-carboxyl phenyl)-N'-(2,6-diisopropyl phenyl)-1,7-bis(N-pyrrolidyl)perylene 3,4:9,10-tetracarboxylic-acid bisimide and N-(4-carboxyphenyl)-N'-cyclohexyl-1,7-bis(N-pyrrolidyl)perylene 3,4:9,10-tetracarboxylic acid bisimide.    EXAMPLE - N-(4-tert-butoxycarbonyl phenyl)-N'-(2,6-diisopropyl phenyl)-1,7-bis(N-pyrrolidyl)perylene 3,4:9,10-tetracarboxylic-acid bisimide (29 mg), trifluoroacetic acid (in mL) (10) and 5wt%-sulfuric acid (7.5) were dissolved in chloroform (10) and heated for 24 hours. The mixture was cooled, separated, extracted, washed, dried by anhydrous magnesium sulfate and distilled to obtain N-(4-carboxyl phenyl)-N'-(2,6-diisopropyl phenyl)-1,7-bis(N-pyrrolidyl)perylene 3,4:9,10-tetracarboxylic-acid bisimide (22.3 mg).