Study on crystallization, thermal stability and hole transport properties of conjugated polyazomethine materials containing 4,4′-bisamine-triphenylamine

Two novel conjugated hole transport polyazomethine materials have been reported by the reaction between 4,4′-bisamine-triphenylamine and dialdehydes. The polymers have non-crystalline, heat resistance stability, hole transport properties. The polymers were characterized by IR, and 1H NMR spectroscopies. The crystalline actions of the condensed polymers that were synthesized from different solvents were investigated by X-ray diffraction study. The result indicated that no crystalline phenomenon occurred when the solvent was dimethylbenzene. The thermal stability of the polymers was conducted by thermogravimetry (TG) and differential thermal analysis (DTA). The ionization energy and frontier linear molecular orbital level were calculated by quantum chemical initial calculation method, which indicated that the polymers have good thermal stability and hole transportation properties.