Synthesis And Photoluminescence Property Study Of Novel Oxadiazoles Ligands And Its Complexes

Due to the transition metal complexes with high fluorescent efficiency and to attract people's attention in organic electroluminescent devices materials. Especially the complexes of iridium, which can achieve singlet and triple configuration, quantum radiation efficiency can reach 100% within theory, and so become electroluminesent research hotspot. In recent years, the organic electroluminescent cell a branch of organic electroluminescent,due to which has the function of ionic conduction ionic complexes in the device, so in the light, and the efficiency of devices in the full-color display performance are very good, Another method of preparation is easy to use spin coating and its structure is simple, Also get the favour of people.Therefore, based on the study of domestic and foreign research in ionic iridium complexes, Design and synthesize eight ionic iridium complexes which have different ligands.With pyridine as phenyl dimers of ionic iridium complexes [Ir(N^N)(ppy)2]+(PF6-),Such complexes have shorter life expectancy and high excited phosphorescence efficiency, fluorescence emission wavelength around 600nm mainly red in the methylene chloride solution, which is the good materials in red.With 2,5-diphenyl-1,3,4-oxadiazoles as dimers of ionic iridium complexes [Ir (DPO)2(N^N)]+(PF6-), Oxadiazoles have excellent electronic transmission, good luminous property, thermal stability and chemical stability, which are one of the most widely used and research in electron-transporting materials, Two phenyl increased conjugate length of oxadiazoles, expanded complexes conjugated system. Such complexes fluorescence emission wavelength is 510nm mainly in green-yellow in methylene chloride solution , which is good materials to full-color.Through the Nuclear magnetic resonance spectroscopy, Infrared spectra to determine structure of ligand, X-ray diffraction to determine crystal structure of complexes. Through the uv - visible absorption, fluorescence emission performance luminescence properties of complexes, A detailed discussion optical physics and electrochemical properties of the ionic iridium complexes .