Syntheses And Properties Of Novel C^cphosphorescent Materials

With the development of electronic technology,a variety of flat panel displays isimproved.Especially.the OLED is highly concerned,because it has much advantage suchas solid-state,self-luminous,high-contrast,low-power,no limiting view,fast-response,wide operating range,flexible display. Phosphorescent materials play an important rolein OLED, because they can utilize both singlet and triplet excitons, and reach atheoretical internal quantum efficiency of100%. Iridium(III)complexes are the mostpromising phosphorescent material because of their remarkable strong spin-orbitcoupling and rather short phosphorescent lifetime. Therefore, developing new ligandsand modifying existing ligands can obtain different light-emitting complexes and thenachieve full color display.1.Threenoveliridiumcomplexes(fpmi)2Ir(pic),(m-fpmi)2Ir(pic),(o-fpmi)2Ir(pic)were designed and synthesized by using different cyclometalated ligands and the2-formylpyridine for ancillary ligands,the reaction are UIIman, iodination, substitutionand exchange and so on.The reaction conditionwas optimize:Iridium chloride ligandsare obtained under dark and anhydrous condition,the target compounds have been8h,the temperature is100-120℃,material ratio is1:2.5.2.In chapter III,three metal Ir(III) compounds (fpmi)2Ir(ppy),(m-fpmi)2Ir(ppy)(o-fpmi)2Ir(ppy)were designed and synthesized by changing the ligands and the positionof the different substituents Fon phenyl.The reaction conditions were optimized:thereaction need8-10h,their temperature is100-12℃,material ratio1:2.0.The structures of six compounds were characterized by mass spectra and1H NMR，their photophysical and electrochemical properties were measured through UV-vis absorption spectra,emission spectra, cyclic voltammetry, their stabilities were measuredby differential scanning calorimetry(DCS) and thermal gravimetric analysis(TGA).Theresearch indicated these compounds are promising phosphorescent materials with goodstabilities and level match.