Different Structure Ligand To Metal Iridum (Ⅲ) Complex Illumination Performance Research

In the organic electroluminescent material, metal complexes with high efficiency fluorescent quantum, at present in the luminescent material research area was considered as an application prospect kind of material. In the metal complexes, difference of the ligand structure, has the tremendous influence to the metal preparation illumination performance,designed and synthesized of pyrazine organic host ligands and pyrimidine series organic auxiliary ligands, withdrew the flavonoid from the osmanthus branch plant to take the auxiliary ligand,and their iridium (â…¢) Series complexes. And by elemental analysis, melting point determination, NMR methods and so on of synthetic compounds for structural characterization, use UV-Visible spectroscopy and fluorescence spectroscopy determination of iridium (â…¢) complexes phosphorescence series of absorption spectra and photoluminescence spectroscopy. And summarized the organic ligand molecular structure to the phosphorescent glow material nature influence rule. The papers give the following major conclusions :1. Designed and synthesized the pyrazine organic host ligand and the intermediate product. 2-methyl-2,3-dihydro-5,6-diphenyl-pyrazine(MDPPH),5-methyl-2,3- diphenyl-pyrazine(MDPP).2. Synthesis of a new type of phosphor material auxiliary Ligand: 4-phenyl pyrimidine (PPM), (4-phenyl-fluoroethyl) pyrimidine (FPPM), 4-(2,4-difluoro phenyl) pyrimidine (DFPPM). Using CuCl for catalyst, inspected the reaction temperature, time, a CuCl/alkone mole of ratio and PH these four factors to the product yield influence.The reaction temperature in the reaction process is a very important influence factor.3. The synthesis and the nature of metal complexes(1)Through the molecular design, for the first time synthesized two series of new metal complexes phosphorescent material. Pyrazine pyrimidine-iridium(â…¢) complexes:Ir(MDPP)₂Cl(PPM),Ir(MDPP)₂Cl(FPPM),Ir(MDPP)₂Cl(DFPPM) Pyrazine pyridine - iridium (â…¢) complexes :Ir(MDPP)₂(Bpy),Ir(MDPP)₂(PY),Ir(MDPP)₂Cl(PY-CN),Ir(MDPP)₂Cl[PY-N(NH₃)₂].(2)Using NMR and elemental analysis method, to proof the molecular structure characterization of pyrazine pyrimidine - iridium (III) series and pyrazine pyridine - iridium (â…¢) series metal complexes.(3) Has determined two series metal complexes which synthesizes: Pyrazine pyrimidine - iridium (â…¢) series,Pyrazine pyridine - iridium (III) series phosphor materials UV-visible absorption spectroscopy and photoluminescence spectra. The determination result indicated that, each metal complexes all has the very strong ligandÏ€-Ï€* and the MLCT jump absorption, 1MLCT and 3MLCT all may distinguish.(4) Determination of the flavonoids as a supplementary allocation of metal complexes properties.4.The influence of ligand structure to metal preparation illumination nature:The influence of main ligand structure to metal preparation illumination wave length:When the main ligand conjugate system is bigger, metal complex wavelength of light to the long-wave move that occurred red shift.Discovery different assistance ligand molecular structure to metal complexes fluorescence wave length influence existence following rule: When substituents for the exclusion of the electronic group, its fluorescence spectrum has the red shift; When substituents for the electron-with drawing groups, its fluorescence spectrum has the blue shift; Also attracts the electronic ability to be stronger, its spectrum blue moves obviously.