Syntheses And Properties Of 8-Hydroxyquinoline Metal Complexs

Organic light-emitting diodes(OLEDs) have been extensively studied due to their potential applications for low driving voltage,bright color,flat panel displays. As the most extensively used green-color electroluminescent material, 8-hydroxyquinoline aluminum in solid state possesses good film formation and thermal stability,high electron transfer mobility and fluorescence quantum efficiency. Therefore,through modification of the 8-hydroxyquinoline structure bone,we can obtain new materials with desired color,efficiency and stability,etc.Two novel ligands were synthsezied by a series of reactions such as bromosubistitution,the diazotization and bromodiation of aminogroup,ullmann reaction,suzuki crossing reaction and others reactions,In addition,5-(4'-N,N'-diphenylamidocyanogen)phenyl-8-hydroxyquinoline and 5-(4'-(9H-9-carbazolyl)phenyl)-8-hydroxyquinoline were reacted with AlCl₃ to give two novel ligands and characterized by ¹H-NMR and elemental analysis(EA),and compared and studied with absorption and luminescence,provding academic foundation for OLED materials.In addition,a series of phosphorescent iridium and platinum complexes with the ancillary ligands being 5-(4'-N,N'-diphenylamidocyanogenphenyl) -8-hydroxyquinoline have been synthesized in this paper.Organic intermediate product of 5-bromo-8-hydroxyquinoline has been synthesized with a good rate of production through orthogonal experiment,The influence of solvent,temperature and time have been mended in this paper.The structure of 5-bromo-8-hydroxyquinoline was confirmed by ¹H-NMR and elemental analysis(EA),providing a basic intermediate product for the OLED materials.