Abstract
Abstract The molecule Hexachlorocyclotriphosphazene(N3P3Cl6) was seldom being applied in OLEDs. In our research, it was chosen to react with some simple aromatic compounds, such as pyrrole and indole, by general acid-base and Appel reactions, and then a series of materials with cyclotriphosphazene core were synthesized. By comparing the UV-Vis spectrums of the NP materials with those of their substituents, it was known that the electron transition mainly occured on the outer substituent parts of the whole molecules said the photophysical properties were determined by the outer substituents. Besides, all the NP materials got large energy gaps to block holes. Otherwise,they almost possessed well reductive properties and suitable LUMO energy levels for transporting electrons. From the discussion of thermal properties, it was known that their glass transition temperatures(Tg) would not increase very much while increasing their molecular weights, but effected significantly by their molecular structures. . Among the NP materials, ProNP and IndNP were determined and discussed by X-ray diffraction. At last, devices were designed and made to test their practicality by comparing to Alq3.