TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): Preparing the compound (I) involves placing starting from the 1,3,5-benzentricarbonyl-trihalide (preferably trichloride) in a solvent (preferably organic sulfide, especially carbon sulfide) together with a stoichiometric quantity of a Lewis acid (preferably aluminum trichloride) at a temperature not above 15-20 degrees C in a water/ice bath; adding the functionalized compound A1 under stirring and then heating by refluxing to complete the reaction; dissolving the final compound by adding an aqueous diluted solution of a mineral acid (preferably hydrochloric acid) to the reaction; separating the organic phase and repeating the extraction operations collecting the extracts containing the final compound; and recovering the final product by crystallization or evaporation of the solvent optionally by carrying out further purifications steps. Preferred Definitions:    A1=carbazole radical, N-alkyl substituted carbazole, N-phenyl substituted carbazole, N-CN substituted carbazole, C-alkyl substituted carbazole, C-OH substituted carbazole, C-SH substituted carbazole, C-halo-substituted carbazole, C-CN substituted carbazole, biphenylene radical, alkyl substituted biphenylene, halo, substituted biphenylene, OH substituted biphenylene, SH substituted biphenylene, CN substituted biphenylene, fluorene radical, 9-alkyl substituted fluorene, 9-CN substituted fluorene, 9,9'-dialkyl substituted fluorene, 9,9'di-CN substituted fluorene, alkyl substituted fluorene, CN substituted fluorine, alkyl substituted triphenylene, triptycene, bifluorenylidene, alkyl substituted bifluorenylidene, fluorenone aromatic radical, benzo(ghi)fluoranthene, 2-phenyl-1,3,4-oxadiazole or anthracene.    SPECIFIC COMPOUNDS - 9 Compounds are disclosed as the compound (I) e.g. N1,N3,N5-tris(5-(4-metoxyphenyl)-1,3,4-oxadiazol-2-yl)benzene-1,3,5-tricarboxamide)) (Ia), N1,N3,N5-trietyl-N1,N3,N5-tris(5-(4-methoxyphenyl)-1,3,4-oxadiazol-2-yl)benzene-1,3,5-tricarboxamide), (N1,N3,N5-tris(anthracen-2-yl)benzene-1,3,5-tricarboxamide), (N1,N3,N5-tris(anthracen-2-yl)-N1,N3,N5-triethylbenzene-1,3,5-tricarboxamide, and benzene-1,3,5-triyltris((fluorenon-2-yl)methanone)tricofluorenone.    EXAMPLE - Triethylamine (222.62 mg) followed by 1,3,5-benzenetricarbonyl trichloride (87.6 mg) in dichloromethane (DCM) (10 ml) were added to a solution of 2-amino-5-(4-methoxyphenyl)-1,3,4-oxadiazole (191.19 mg) in DCM (10 ml), stirred for 3 hours, and the solvent was removed under vacuum, and dried to obtain N1,N3,N5-tris(5-(4-metoxyphenyl)-1,3,4-oxadiazol-2-yl)benzene-1,3,5-tricarboxamide)).