TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (Claimed): The amine/amine oxide-modified perylene diimide derivative (I) is prepared by reacting perylene tetracarboxylic acid anhydride with amine derivative of formula: H2N-R1-N(-R2)-R2 (IX) as primary amine and heating to reflux in solvent. The amine/amine oxide-modified perylene diimide derivative (II) is prepared by adding predetermined amount of hydrogen peroxide to amine/amine oxide-modified perylene diimide derivative (I), and mix-heating mixture. Preferred Composition: The molar ratio of perylene tetracarboxylic acid anhydride and amine derivative (IX) is 1:10. The molar ratio of amine/amine oxide-modified perylene diimide derivative (I) and hydrogen peroxide is 1:10. The solvent is methanol, ethanol, methanol, isopropyl alcohol, isobutyl alcohol and/or n-butyl alcohol. Preferred Process: The perylene tetracarboxylic acid anhydride and amine derivative (IX) are reacted under air or inert atmosphere, preferably nitrogen-argon atmosphere for 2-24 hours. The hydrogen peroxide and amine/amine oxide-modified perylene diimide derivative (I) are reacted under air or inert atmosphere, preferably nitrogen-argon atmosphere for 2-24 hours. The perylene tetracarboxylic acid anhydride and amine derivative (IX) are reacted, filtered, and filter cake is washed with deionized water and alcohol to obtain amine/amine oxide-modified perylene diimide derivative (I), and low-boiling-point solvent is removed from reaction system, to obtain amine/amine oxide-modified perylene diimide derivative (II). Preferred Definitions:    R1=-CH2CH2- or -CH2CH2CH2-;    R2=methyl or ethyl;and    R3=H.    SPECIFIC COMPOUNDS - 6 Amine/amine oxide-modified perylene diimide derivatives are specifically claimed e.g. 2,9-bis-(3-dimethylamino-propyl)-anthra(2,1,9-def;6,5,10-d'e'f')diisoquinoline-1,3,8,10-tetraone of formula (Ia), 2,9-bis-(2-diethylamino-ethyl)-anthra(2,1,9-def;6,5,10-d'e'f')diisoquinoline-1,3,8,10-tetraone, 2,9-bis-(2-dimethylamino-ethyl)-anthra(2,1,9-def;6,5,10-d'e'f')diisoquinoline-1,3,8,10-tetraone, 3-(18-(3-(dimethyl-oxo-azanyl)propyl)-6,8,17,19-tetraoxo-7,18-diazaheptacyclo(14.6.2.22,5.03,12.04,9.013,23.020,24)hexacosa-1(22),2,4,9,11,13,15,20,23,25-decaen-7-yl)-N,N-dimethylpropanamine oxide, and 2-(18-(2-(diethyl(hydroxy)azaniumyl)ethyl)-6,8,17,19-tetraoxo-7,18-diazaheptacyclo(14.6.2.22,5.03,12.04,9.013,23.020,24)hexacosa-1(23),2(26),3,5(25),9,11,13,15,20(24),21-decaen-7-yl)-N,N-diethylethanamine oxide.