Organic Light-emitting Materials - N, N'-aryl Biphenyl Diamine Synthesis

Electro luminescent (EL) materials are the substances that give out lights when excited by electric field. We call them electro luminescent materials because they are on the process translating the electric energy into optical energy.Organic electro luminescent materials have many merits, for example, lower drive voltage which suits the voltage of integrate circuit, shorter response time, high luminescence brightness and efficiency, easy to modulate color to realize the whole color display and so on. At the same time, organic materials have characteristics of lightweight, quite flexible, easy to process. These are all traditional inorganic materials and liquid crystal display that can't compare to. Because of these, organic electro luminescent materials have the application to the super thin and big area flat display, manufacture of folding " electronics newspaper" and high-efficiency outdoors and indoors illuminating apparatus and have become a new research hotspot of electro luminescent realm and attached importance by chemistry, optics, materials and the related science realm extensively. On the base of analyses of research work related to , we have made it sure to target with N, N'-dipheny-N, N'-bis (3-methyl-phenyl) 1,1'diphenyl-4, 4'-diamine . Through quantities of experiments and deep speculations, we have succeeded in preparing novel organic electro luminescent material which has the practical value. And the concrete of research contents with result as follows:1.Research contents(1) The main type and their characteristic of organic electro luminescent materials;(2) The function and mechanism of organic electro luminescent materials;(3) The molecule and configuration selection of organic electro luminescent materials;(4) The route design of synthesize N, N'-dipheny-N, N'-bis (3-methyl-phenyl) 1,1'diphenyl-4, 4'-diamine;(5) The synthetic method and process of N, N'-dipheny-N, N'-bis (3-methyl-phenyl) 1,1'diphenyl-4, 4'-diamine;(6) The structure characteristic and performance testing of N, N'-dipheny-N, N'-bis (3-methyl-phenyl) 1,1'diphenyl-4, 4'-diamine;2.Research result:According to design of synthesis route, and using large optimum experiments, we get target compounds. The construction test expresses, the molecule constructions for synthesizing compounds are completely consistent with the design ones. Making use of optimizing experiments, we have studied the synthetic method and proceed extensively, and got the best synthetic method and process conditions. Our synthetic method has many merits: fewer steps, simple process, operation easy, the equipments request is quite low, plentiful raw material source, and products easy to separate purely. Under the conditions of best process, the yield rate of the products N, N'-dipheny-N, N'-bis (3-methyl-phenyl) 1,1'diphenyl-4, 4'-diamine can attain 72%, which is 5% higher than the literature reports. The yield rate of their forepart of intermediate attains 66%, which is about 10% higher than the literature reports. The results of pure degree analysis tests the pure degree of compound is 99.92%. And they can satisfy the request for make useful apparatus. The analysis of fluorescence spectrum expresses, the materials wavelength excited by lights are at visible light scope, and possess characteristic of electro luminescence.