POLYAZOMETHINE BASED ON 5,5'-METHYLENE-BIS-SALICYLIC ALDEHYDE AND DIAMINE-FLUOROPHORE Russian patent published in 1998 - IPC

FIELD: luminophores. SUBSTANCE: invention proposes new luminophores - polyazomethines based on 5,5'-methylene-bis-salicylic aldehyde and 9,10-bis-(p-aminophenyl)-anthracene (I) or on the base of 5,5'-methylene-bis-salicylic aldehyde and unsubstituted rhodamine chloride (II). New luminophores were synthesized by polycondensation of diamine-fluorophore with 5,5'-methylene-bis-salicylic aldehyde in medium of N-methylpyrrolidone at 140-150 C in argon flow under vacuum (100 mm mercury column) for 5-7 h. The obtained polymers are powder-like substances of light-brown color (polymer 1) and dark-claret color (polymer 2). On the basis of dynamic thermogravimetric analysis decomposition point of these substances in air is 400 C, deformation point is 250-340 C. Data of IR-spectroscopy confirm the presence of band ν = 1620 cm^-1 that is characteristic for polyazomethines. EFFECT: improved method of synthesis. 1 tbl