Photoluminescence of some aluminum(III) complexes

Abstract The spectroscopic properties of seven aluminum(III) complexes (including AlQ 3 ) are examined. The ligands of the aluminum complexes are 2,2′-biphenol, 1,1′-bi-2-naphthol and 8-hydroxyquinoline. The effect of the aromatic ligands 2,2′-biphenol and 1,1′-bi-2-naphthol, on the photoluminescence of 8-hydroxyquinoline aluminum(III) complexes was studied. The λ max (nm) of the emission spectra was measured in solution (with THF as the solvent) and in the solid state. The results show that some energy is transferred between the aromatic ligand and 8-hydroxyquinoline in aluminum(III) complexes, according to emission spectra of the complex obtained using a photoluminescence emission spectroscope. But the mechanisms of energy-transfer are not clear now.