Red−Green−Blue Emission from Tris(5-aryl-8-quinolinolate)Al(III) Complexes

A simple yet effective strategy for synthesis of
5-aryl-8-quinolinolate-based electroluminophores with tunable emission wavelengths is presented. Two different
pathways for the attachment of electron-donating or electron-withdrawing aryl groups to the 5-position of the quinolinolate ligand via Suzuki coupling were developed. A successful
tuning in the emission color was achieved:  the emission
wavelength was found to correlate with the Hammett
constant of the respective substituents, providing a powerful
strategy for prediction of the optical properties of new
electroluminophores.