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

In the21st century, Sustained and rapid development of information technology put forward higher request to information displayed system. Organic electroluminescent light emitting device (OLED) which cater to the information age, came into being as the next generation of flat panel display technology. The OLED is a kind of high-performance flat display device with properties of lighter, thinner, and wider angle of view. With the broad prospect of application and technology advanced rapidly, OLED has become one of the hottest topics in the field of information display. Indole [3,2-b]carbazole and its derivatives gain the characteristics of higher quantum efficiency of fluorescence, preferable rigid conjugate plane and strong intramolecular electron transfer. And by its molecular "assembly" and "cutting", a variety of luminous colors of organic molecules can be designed. As above, people are greatly inspired to promote the development and application of the indole [3,2-b]carbazole and its derivatives. In the thesis, the synthesis, performance and quantum chemical calculations of the compounds were studied.First, we have access to a large amount of relevant literatures in the thesis. A series of indole [3,2-b]carbazole derivatives were synthetized with chemical modification. Before this, maternal indole [3,2-b]carbazole was obtained via starting materials of1,4-cyclohexanedione and4-bromophenylhydrazine hydrochloride.Second, the structure of the compound was determined by the nuclear magnetic. Also, the dissertation studied the luminescent properties of the target compounds in fluorescence lifetime, fluorescence emission spectra, UV-vis absorption spectra etc. Besides, electrochemical properties and the thermal stability of some of these compounds were measured. The test results are shown:The target compound possess a strong fluorescence emission, high fluorescence quantum yield and good thermal stability, it can be used as excellent electroluminescent material. In addition, we studied F-recognition on the part of the target compound, which turned out that the compounds have good luminous performance and high temperature resistance, which turned to be a good organic small molecule lumines material.Third, in the thesis, computational approach of quantum chemistry is adopted to study part of the target compounds in some fields. Such as the ground state structure, the energy level distribution, the lowest singlet excited state (S1), the electronic absorption spectra and fluorescenceemission spectra. Making a comparison between theoretical calculation and experimental results on the target compounds, we may keep an objective and scientific eye on the excellent performance of the synthetic compounds.In conclusion, a series experiments are conducted, the objective compounds are obtained. Various performances are researched. All these studies provide a new thought for the exploration of indole[3,2-b]carbazole compounds. The range of small organic molecule luminescent material is developed, which leads people do some research in these aspects.