TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Materials: The chromophore group comprises substituted or unsubstituted pyrene, perylene, p-terphenyl, 1,6-diphenylhexatriene of formula (Ia'), quinoline, phenanthroline, or coumarin. The conjugated or polycondensed aromatic cyclic hydrocarbons and the compounds containing aromatic heterocycles comprise auxochrome substituents with bathochromic or hypsochromic effect. The polymer or copolymer is reacted with 6-amino-3,4-benzocoumarin, 3-aminocoumarin or 1-aminopyrene, N-salicylidene-4-aminoaniline, alpha -benzoyl-4-amino-cinnamonitrile, 5- amino-1,8-(N-octyl)naphthalimide, 3-aminofluoranthene, preferably 6-amino-3,4-benzocoumarin, 3-aminocoumarin, 1-aminopyrene, or their substituted derivatives. The reactant having amine group is ammonia or primary aliphatic or aromatic amine having 1-20, preferably 1-10C. The polymer or copolymer is reacted with benzanilide, formanilide, urea, dimethylurea, diphenylurea, or acetamidophenol.n=1-3.    TECHNOLOGY FOCUS - POLYMERS - Preferred Materials: The polymers and copolymers comprise 0.10-99.99 mol% of monomeric units of an alkyl acrylate or alkyl methacrylate, 69.99-0% of vinyl aromatic monomer, 0.01-10, preferably 0.1-55 mol% of cycloimide units of formula (Ia), and 0-99.89, preferably 1-90 mol% of cycloimide units of formula (Ib). The chromophore groups inside the polymer or copolymer is 0.1-3 mol%. The acrylic monomers are methyl acrylate, methyl methacrylate and butyl methacrylate monomers. The polymers and copolymers further comprise vinyl aromatic monomers, preferably styrene, the copolymers being statistical or block type. They further comprise 0.10-10 mol% of cycloimide units functionalized with luminescent chromophore group of formula (Ic) and 1-90 mol% cycloimide units of formula (Id).R3=H or aliphatic or aromatic hydrocarbon having 1-10C;andR"=multiple-type system of pi , delocalized electrons, including conjugated or polycondensed aromatic cyclic hydrocarbons having 6-24C in the conjugated or aromatic skeleton, and compounds containing aromatic heterocycles having greater than or equal to 5, preferably 6-20C.Preferred Methods: Imidization reaction is carried out at a higher temperature than the polymer or copolymer melting temperature. The process further comprises reaction of the polymer or copolymer with a reactant having an amine group N-substituted with hydrogen, alkyl, or phenyl groups. EXAMPLE - About 20 g of a copolymer containing 98 wt.% of methyl methacrylate and 2 wt.% of methyl acrylate, and 100 mg of 6-amino-3,4-benzocoumarin were charged, in a nitrogen atmosphere, into a glass reactor. The mixture was heated gradually to its melting point and then to 200 degrees C. The reaction was continued at this temperature for 3 hours and then cooled under nitrogen. The raw reaction product was diluted with 50 ml of dichloromethane, obtaining a solution from which the polymer was recovered by coagulation with methanol. The copolymer thus imidized was filtered and dried under vacuum at 60 degrees C.