Synthesis and Photosensitive Properties of Poly(aryl imino) Containing Azobenzene Group (PAI-A)

Using 4,4'-dibromobenzophenone and 4,4'-diaminoazobenzene as monomers, poly(aryl imino) containing azobenzene unit (PAI-A) was synthesized via palladium-catalyzed amination, and structurally characterized by means of FT-IR, H-1 NMR spectra and elemental analysis, the results of which show an agreement with the proposed structure. The UV absorption spectra were tested under different conditions. Additionally, differential scanning calorimetry (DSC) and thermogravimetric (TG) measurements show that PAI-A possesses high glass transition temperature (T-g> 176 degrees C) and good thermal stability with high decomposition temperatures in nitrogen atmosphere (T-D>410 degrees C).