Synthesis And Properties Of Stilbene-Triarylamine As Charge Transfer Materials

Charge Transfer Material (CTM), as the main part of the Charge Transfer Layer (CTL) of Organic Photoconductor (OPC) and Organic Electroluminescent Devices (OLED), will significantly influence the performance of organic photoconductive devices. Synthesis of novel CTMs is a hotspot of the xerography field. What is more, the CTM is confirmed useful in plate display field. So much attention was paied on how to get the material, which has excellent charge transfer property and electroluminescence. Two kinds of CTMs were synthesized and their properties were analyzed in the present thesis.One synthetic technics was improved and two routes were designed. Using α-naphthaldehyde and 1-(bromomethyl)-4-nitrobenzene as raw materials, 1-(4-nitrostyryl)naphthalene was prepared. Using 4-nitrobenzaldehyde and bromodiphenylmethane as raw materials, 1-(2-(4-nitrophenyl)-1-phenylvinyl)benzene was prepared. Then six final compounds were obtained via reduction and Ullmann reaction. The structures of nitro intermediates were identified by IR. The structures of final products were confirmed by IR, MS and Single crystal X-rays diffraction. Two final products may be high-sentivity CTMs because their Eox are between 0.50~0.65V by Oxidation-reduction Potential study. Their fluorescence properties both in solvent and soild film were investigated and results indicated that the compounds were well-performance blue electroluminescence materials. Five novel crystals were obtained and their crystal structures were studied.