Synthesis And Properties Of β-diketone Ligands Containing Carrier-transport Groups And Their Phosphorescent Iridium Complexes

Since Forrest et al reported a heavy metal complexes can be used as an efficientphosphorescent organic electroluminescent material since the research in this area has arousedwidespread concern[1]. Especially organic heavy metal iridium complexes, the use of tripletradiation, produced a strong spin-orbit coupling realize singlet and triplet luminescenceradiation simultaneously, greatly improved luminous efficiency can reach triple fluorescentmaterials, theory the internal quantum efficiency of up to100%, thus phosphorescent materialmuch attention of people. Iridium metal complexes are currently the most widely used anelectroluminescent phosphor material[2]. Coumarin derivative as a ligand, metal complexes ofiridium, by changing the type and configuration of the ligand binding emitting wavelengthcan be adjusted, thereby realizing the luminescent color of the material, we have synthesizedthe compounds of this design.By a ring of metal iridium complexes of high quantum efficiency, brightness, color,diversity has become a short-excited phosphorescent metal complexes in the most valuableluminescent material.[6-9]through ligand design and synthesis of ring metal iridium complexmatter emitted light can be debugged.[6-8]coumarin derivatives can be connected to the ringmetal iridium and iridium complexes regulate the energy gap, coumarin as a candidate ligandof iridium as a variety of optical applications such as optical sensors and OLED technology.Coumarin ring iridium complexes are representative of a new one as a secondary type ofphosphorescent material in the organic light emitting diode, which has a high visible lightabsorption, high quantum efficiency and a higher brightness. In previous work, have beenreported in some of coumarin iridium complexes,3-(2-pyridyl) coumarin or3-(2-benzothiazolyl-) coumarin ring metal ligand used, levulinate help monoanionic ligand. Theiridium complexes of coumarin have been shown to be a good green and orange-redphosphor.2,5-diphenyl-1,3,4-oxadiazole and their derivatives have been found to exhibita strong light emission efficiency, and most of the organic light emitting device electrontransporting material in the electrical, but light emission efficiency is limited from[9-12],because of its easy to crystallize in the production process of organic light-emitting diodes inthis case If the electron transport groups linked to the polymer backbone will be eased[12-15].Further, a carbazole derivative having a high thermal stability. The second chapter, we became two β-diketone ligand containing carrier transportgroups as coumarin ring second ligand metal complexes thereofn the third chapter, the use of these two ligands we got two yellow iridium complexes r(1L)2(acac-Cz) and Ir (1L)2(acac-Cz), where L=3-(2-pyridyl) coumarin ring metaliridium complexes, acac-Ox=13-(4-(5-(4’-tert-butyl-phenyl)-1,3,4-oxadiazole) benzyl)-glutaric ketones, acac-Cz=3-((4-(9-carbazole-) phenyl) methyl)-pentane-2,4-pentanedione, by infrared spectroscopy, nuclear magnetic resonance spectroscopy (1H NMR)and X-ray diffraction and other means of testing their structures were characterized. Andtheir UV absorption spectra and infrared absorption spectra were measured and analyzed.The fourth chapter, we got two orange light iridium complexes r (1L)2(acac-Czcomplexes by UV absorption spectroscopy, infrared spectroscopy and fluorescencespectroscopy were used to characterize them...