Synthesis And Properties Of Novel Electroluminescent Materials Based On Triphenylamine

As an important class of organic electroluminescent material, triphenyl amine compound exhibits excellent luminescence properties, high emission luminance and luminous efficiency, and the color purity is also higher. Its non-co-planar spatial structure for the enhancement of the fluorescence efficiency of the material also has a certain contribution. Triarylamines molecule itself also has good hole transport capabilities,widely applied in orangic photoconductives(OPCs), organic light-emitting diodes(OLEDs),organic field-effect transistors(OFETs), organic/polymer photovoltaics (OPVs), dye-sensitized solar cells (DSSCs). In this paper, a series of Triphenylamine materials with different structures were synthesized via palladium-catalyzed C-N cross-coupling reaction. Their structures and properties were characterized by means of FT-IR, NMR, XRD,TG,UV and fluorescence. The main tasks of the paper are as follows:(1)This paper described the reaction mechanism, research status and device structure of organic EL materials, focusing on introducing the species, synthetic methods, performances, and applications of the triphenyl amine compound and polyfluorene.(2)Under laboratory conditions this paper has obtained three novel poly(triphenylamine biphenyl)s (PTPABs)via palladium-catalyzed C-N cross-coupling reaction. Their structures were characterized by means of FT-IR,’H-NMR, XRD. Their properties were investigated by TG, DSC, UV-Vis absorption(UV-Vis), fluorescence spectra(FL) and electrochemical cyclic voltammetry(CV). These results suggest the three polymers to be promising candidates for good thermal stability materials^hole transport materials and blue electroluminescent materials.(3)Three novel poly(triphenylamine fluorine)s(PTP-AFs) were successfully synthesized via palladium-catalyzed C-N cross-coupling reaction. Their structures were characterized by means of FT-IR,’H-NMR, XRD. Their properties were investigated by TG, DSC, UV-Vis absorption(UV-Vis), fluorescence spectra(FL) and electrochemical cyclic voltammetry(CV). These results suggest the three polymers to be promising candidates for good thermal stability materials^hole transport materials and blue electroluminescent materials.(4)New catalyst systems and synthesis methods were developed to overcome the defects existed in the primitive way. In this chapter, we synthesized the triphenylamine-based material via organic nucleophilic substitution reaction with highly active monoers. This method is simple and needs cheaper catalyst which is easy to get, and high molecular weight polymers were prepared in a short time.4,4’-dihydroxy-triphenylamine(DHO-TPA) as the monomer was synthesized by the deprotection reaction with BBr3/CH2Cl2. High-performance poly(ether ether sulfone) triphenylamine (TPA-PEES) was obtained by the nucleophilic reaction of the4,4’-dihydroxy-triphenylamine and4,4’-difluorodiphenyl sulfone using the anhydrous K2CO3as catalyzer. The structure and properties of polymer were characterized by methods of FT-IR,1H-NMR spectroscopy, DSC, TG, XRD, etc. The results showed that the polymer had high molecular weight (Mw=3.12X104), good thermal stability and excellent performance of light-emitting.