Synthesis And Light-emitting Properties Of 8-hydroxyquinoline Derivative And Its Metal Complexes

Organic electroluminescent(EL) materials is the hot-topic research in the field of international flat-panel display. Such materials has advantages of a simple structure, high yield and low cost, active light, fast response, high resolution; and performance of solid-state, non-vacuum device, with anti-shock, low temperature. It has aroused great concern and is considered to be a new technology which is most likely alternative to LCD. In the past decades, The rearch on Light Emitting materials and devices has made considerable progress, witn its main technical indicators have been near or at the actual application.8-hydroxyquonoline derivate is a very typical organic electroluminescent material. We control 8-hydroxyquinoline compounds and their complexes'spectra by the method of chemical modification. It is an important value for expanding the application rang of organic electroluminescent materials and optimizing the performance of the devices. 5,5′-methylenebis-8-hydroxyquinoline(bql) was synthesized by chemical modification to 8-hydroxyquinoline in this research. Its structure was confirmed by infrared spectroscopy, nuclear magnetic resonance NMR analysis, X-diffraction analysis and further research is on the synthesis of magnesium(II) and silver(I) complexes. We also studied different conditions on the luminescence properties. Compared to the ligand(bql), the luminescent intensity of the two complexes has been significantly improved by fluorescence spectroscopy analysis. The maximum wavelength occurred red-shift. This provides theoretical basis for the preparation of electroluminescent devices and research of its properties.In addition, A new crystal single consisting of 4,4′-bipyridine as ancillary ligand, pyridine-2,3,5,6-tetracarboxylic acid as main ligand and metal Ni(II) was developed successfully; Also synthesized another single crystal which was formed by hydrogen bonds between pyrazine-2,3,5,6-tetracarboxylic acid and 4,4′-bipyridine ligand. X-ray diffraction techniques were used to analysis its crystal structure, with the IR spectrum and fluorescence spectrum also be studied. The complexes belong to triclinic, P-1 space group and zero-dimensional structure.