TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: Transition metal salt is ferrous sulfate, ferrous chloride, cuprous chloride or cuprous bromide.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): Phosphorylcholine-modified perylenediimide derivative compound is prepared by reacting perylene-3,4,9,10-tetracarboxylic dianhydride and alkanolamine, adding alpha -bromoisobutyryl bromide, and carrying out atom transfer radical polymerization with phosphorylcholine-containing polymerizable compound under nitrogen or argon gas protection. Preferred Method: Reacting perylene-3,4,9,10-tetracarboxylic dianhydride and alkanolamine is carried out at 100-190 degrees C for 3-30 hours. Reacting with alpha -bromoisobutyryl bromide is carried out at 0-40 degrees C for 1-24 hours with molar ratio of 1:3-1:10. Reacting with alpha -bromoisobutyryl bromide further comprises adding acid-binding agent with molar ratio of 1:1. Atom transfer radical polymerization is carried out at 30-100 degrees C for 8-24 hours using ultrasonic oscillation. Preferred Components: Solvent for reacting with alpha -bromoisobutyryl bromide is halogenated alkane. Phosphorylcholine-containing polymerizable compound is 2-acryloyloxyethyl phosphorylcholine, acryloyloxypropyl phosphorylcholine, acryloyloxybutyl phosphorylcholine, ethyl methacryloyloxyethyl phosphorylcholine and/or methacryloyloxyethyl phosphorylcholine. Initiator contains transition metal salt and ligand. Ligand is bipyridine, 4,4'-di-tert-butyl-2,2'bipyridyl, 4,4'-di-n-heptyl-2,2'-bipyridine, 4,4'-dinonyl-2,2'-dipyridyl or N,N,N',N'',N''-pentamethyldiethylenetriamine. Atom transfer radical polymerization solvent is benzene, xylene, cyclohexanone, anisole and/or tetrahydrofuran. Preferred Composition: Perylene-3,4,9,10-tetracarboxylic dianhydride and alkanolamine molar ratio is 1:2-1:100. Halogenated alkane solvent is at ratio of 100-250 mL:1 mmol. Phosphorylcholine-containing polymerizable compound is added at molar ratio of 20-60:1.