The Research Of Ionic Iridium Complexes And Their Copolymers:Design, Synthesis,Characterization And Optoelectronics

Ionic iridium complexes have great potential applications for luminescent materials in the flied of phosphorescent electroluminescence, chemical sensors, biological imaging and so on. The advantages of these materials are as follows:simple synthetic steps, facile purification; electrochemical properties; and free moving ion contained in the complexes to realize the charge transport, reduce the consumption of device energy.Compared with small molecular luminescent materials, the polymers containing transition metal complexes have been attracted much attention to be constructed the functional materials owing to the unique optoelectronic properties. For example, polymers containing transition metal complexes are widely investigated and applied in polymer light-emitting diodes (PLEDs) due to their excellent phosphorescent emission. However, the reports about their application in memory devices are rare. Actually, are also applied in memory devices, according to the special electronic properties and good redox reversibility, the excellent electron-withdrawing ability of transition metal complexes can improve the stability of conducting states, and the reversible redox properties can make the memory devices more suitable for practical applications. Therefore, polymers containing metal complexes are very promising for application in memory devices. Specifically, the research content includes the following two parts:1, Design and synthesis of a series of ionic iridium complexes based on2’,6’-difluorine-2,3’-pyridine as N(?)N ligands:[Ir(dftpy)2(bpy)]+PF6-,[Ir(dfbpy)2(pyq)]+PF6-and [Ir(dfbpy)2(quqo)]+PF6-, the bpy is2,2’-pyridine, the pyq is2-phenylquinoly, the2,2’quqo is diquinolyl. All of the complexes were confirmed by1H NMR. Photophysical and electrochemical properties of these complexes were investigated and the complexes with different ligands showed different optoelectronic properties. The characteristics of excited state, the photophysical of the complexes and the structures of ligands have been discussed detailedly by the UV-Vis absorption, photoluminescence properties, DFT calculation, The emission wavelength of these complexes are detected from blue (485nm) to red light (570nm). Complexe, when the auxiliary ligand is the bipyridine quantum efficiency is0.92.2, The complexes, main chain containing ionic iridium, were designed and synthesized by the Suzuki reaction, such as PFO-OXD, PFO-Ir and PFO-Ir-OXD. The structures of copolymers are characterized by1H NMR. The experimental results show that:the design and synthesis of polymers become easier via the introduction of transition metal complexes.