Synthesis And Characterization Of New EDOT Derivatives And New Indole Derivatives

In terms of practical application, organic conductive and semiconductor materials compared with inorganic materials have many incomparable advantages, for example: a wide variety easy processing and so on. Therefore, they attracted widespread attention and research in many areas. The basic units of organic conductive and semiconductor materials are benzene, thiophene, pyrrole and other dozen. Various chemical structures for organic conductive and semiconductor materials are synthesized by mutual combination of the basic units and modifying functional groups. Material properties vary with the structure.Some materials obtain a high conductivity after doping, some materials have excellent electrochromic properties, Some materials have good luminescence properties, some material has good hole transport capability. Modifying fine structure is one important way of organic conductive and semiconductor materials development.With a similar structure to EDOT, a molecular(Th-E) containing four active hydrogen was synthesized. By electrochemical polymerization, PTh-E film was prepared and its electrochemical properties and electrochromic properties were studied. During the polymerization, a cross-linked network can be produced.PTh-E gave a smooth and dense film with good electrochemical stability which is demonstrated by its reverible redox curves at a high potential scan rate of 1000 m V/s. After doping, the film changed from brown to blue with a contrast ratio of 20%, a coloration efficiency of 220.66 cm2 C-1,and a response time of 15.5 s.PDIs is a large fused-ring compound which contains to two benzene rings fused three successive pyrrole ring.Six types of PDIs were synthesized. In order to tune the optical properties of materials, thienyl-,tolyl- and cyano- were introduced to the 2,9 position of PDIs.For the purpose of improving the solubility and tuning optical properties of the material, the11 position of PDIs was substitued by tolyl- and 1- octyl-.UV spectra, PL spectra and C-V curve of six moleculars were studied and analyzed. Impacts of different substituents on the electrical and optical properties were summarized.