Synthesis and characterization of a novel AlQ3-containing polymer

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In this article, the synthesis of a tris(8-hydroxyquinoline)aluminum (AlQ3)-containing poly(arylene ether) (4) is reported. The presence of AlQ3 pendants in polymer 4 is confirmed by NMR, ultraviolet–visible, photoluminescence, and gel permeation chromatography analyses. This is the first report of the attachment of AlQ3 complexes as side chains to a polymer. Polymer 4 has a glass-transition temperature of 217.8 °C and is thermally stable with a 5% weight-loss temperature greater than 500 °C under nitrogen, as determined by differential scanning calorimetry and thermogravimetric analyses, respectively. Polymer 4 is quite soluble in common organic solvents, such as tetrahydrofuran, N,N-dimethylacetamide, and CHCl3. A composite that is 80 wt % polymer 4 and 20 wt % AlQ3 forms a transparent and tough film when cast from its chloroform solution. The application of this AlQ3-containing polymer in light-emitting diodes is under investigation.