Synthesis And Study Of Indolo [3,2-b] Carbazole Compounds

The21st century is the economic times of the information network as the core, and the demand of people for electronic products continue to improve while digital products and electronic equipment upgrade at an alarming rate. In order to meet the need of different groups, the development of information technology has become not only an important weight of the people to gain an advantage in the increasingly fierce competition, but also one of the research fields. In the information display technology, organic light-emitting diodes are recognized as a new generation of display technology because of its outstanding performance advantages. In recent years, the indole[3,2-b]carbazole compounds become the excellent organic electroluminescent materials because of their performance, environmental adaptability, easy processing and optimization. In this thesis, the synthesis, performance and quantum chemical calculations of indole[3,2-b]carbazole derivatives were studied. The specific researches focused on the following aspects:1. The synthesis of target compounds. In this thesis, the synthesis of indole[3,2-b]carbazole were introduced functional groups for chemical modification via1,4-cyclohexanedione and4-bromophenylhydrazine hydrochloride as starting materials, and we get a new series of indole[3,2-b]carbazole compounds as electroluminescent materials. On the basis of optimized synthetic, the compounds were characterized and confirmed by NMR.2. Properties of the target compounds. We studied the UV-vis absorption spectra, fluorescence emission spectra, fluorescence lifetimes, solvent effects of luminescent properties, thermal stability and electrochemical properties of the synthesized compounds, and fully reflected the compound as the performance characteristics of organic electroluminescent materials. What’s more, some synthetic compounds were studied in ion recognition and explored the application in fluorescent sensors.3. Quantum chemical calculations of the target compounds. This paper discussed the relationship between molecular structure and luminescent properties via the density functional theory (DFT) and time dependent density functional theory (TD-DFT). The molecular structures, the molecular orbitals, charge injection and transport properties of the ground state, electronic absorption spectroscopy and molecular emission spectrum of the target compounds were studied, and the reflection of the excellent performance of the synthesized compounds is more objective, scientific and accurate.In summary, a series of functionalized indole[3,2-b]carbazole compounds were synthesized, and they were studied from both theoretical and experimental research for the performance of the target compounds. Research for OLED can provide a reference on molecular structure design and performance optimization, and the results demonstrated that the indole[3,2-b]carbazole compounds are a class of organic electroluminescent materials which have broad application prospects.