Novel terpolymers containing carbazole, coumarin and Alq3 complexes
Abstract In this paper, the synthesis of terpolymers bearing carbazole, coumarin and 8-hydroxyquinoline moiety as pendant groups with content of coumarin and 8-hydroxyquinoline between 0.5 and 4 mol% was elaborated. Then the terpolymers underwent complexation reactions with aluminum bis(8-hydroxyquinoline)isopropoxylate (Alq2ispr) to form polymeric hybrid materials with aluminum tris(8-hydroxyquinoline) (Alq3) as side groups. The presence of carbazole, coumarin (MK) and 8-hydroxyquinoline (QM) as well as Alq3 in the terpolymers was confirmed by NMR, UV, photoluminescence, and size exclusion chromatography. The results indicates that these hybrid polymers have moderate molecular weights and solubility in common organic solvents. For photoluminescence spectra, an evidence for energy transfer from carbazole to coumarin and Alq3 groups was observed and highest relative fluorescence intensity was exhibited by solutions of the terpolymers containing the lowest content of MK, QM and Alq3.