Synthesis And Performance Of Some Novel Ir-containing Organic Light-emitting Diodes Based On Nitrogen Containing Five-member Heterocyclic Compounds

Based on the thought of "Molecular Design",five serious of nitrogen containing five-member heterocyclic compounds,as well as three phenanthro[9,10-d]imidazole-based cyclometalated Ir-complexes, were synthesized in this dissertation,which could be divided into six chapter as follows:In the first chapter,the general overview of organic light-emitting diodes(OLEDs) were reviewed.Which included the origin,the developing process and the present status of OLEDs,as well as its advantages and disadvantages in application in display technology in the further.The configuration,the luminescence mechanism and the molecular structures of general luminescence materials in OLEDs were also introduced,which indicated the important significance of the synthesis of new potential luminescent materials in this dissertation. In the second chapter,a serious of 2-substituded benzothiazoles were synthesized according to a new procedure.The reaction condition was optimized and the possible mechanism was provided.The target compounds have been characterized by ¹H NMR,¹³C NMR,IR and MS. The UV-Vis properties of partial compounds were studied.In the third chapter,2,4,5-trisubstituted-1H-imidazoles and 1,2,4,5-tetrasubstitutedimidazoles were synthesized respectively catalyzed by the green room temperature ionic liquids N,N,N-triethylammonium-N-propane sulphonate hydrogen sulfate(1:1) ([TEAPS][HSO₄]),The reaction conditions were optimized and the possible mechanism was provided.The target compounds have been characterized by ¹H NMR,¹³CNMR,IR and MS.In the forth chapter,2-substituted-1H-phenanthro[9,10-d]imidazoles and 2-substituted-1-phenyl-phenanthro[9,10-d]imidazoles were synthesized respectively catalyzed by green room temperature ionic liquids N,N,N-triethylammonium-N-propane sulphonate hydrogen sulfate (1:1)([TEAPS][HSO₄]).The reaction conditions were optimized and the possible mechanism was provided.The target compounds have been characterized by ¹H NMR,¹³C NMR,IR and MS,as well as the UV-Vis properties and luminescent properties of partial compounds were studied.In the fifth chapter,1,3-bis(4,5-diphenyloxazol-2-yl)benzene and 2,6-bis(4,5-diphenyloxazol-2-yl)pyridine,two new compounds,were synthesized by N,N'-dicyclohexylcarbodiimide/4-dimethylamino pyridine (DCC/DMAP) as the catalyst system.The target compound has been characterized by ¹H NMR,¹³C NMR,IR and MS.the UV-Vis properties and luminescent properties of partial compounds were studied.In the sixth chapter,three new 2-substitutedphenanthro[9,10-d]-imidazoles -based cyclometallic Ir-complex were synthesized.The target compound has been characterized by ¹H NMR and MS.Their UV-Vis properties and luminescent properties were studied.The results indicated that their maximum absorption peak of UV-vis were in the range of 263～265 nm,and their maximum emission peak of photoluminescence were in the range of 450～478 nm with the half-peak width between 50～80 nm.All the results indicated that the novel Ir-complex were a new kind of blue organic light-emitting materials.