Synthesis, characterization, effect of triaryl ring Substituents groups on thermal and spectral properties of New soluble triphenylamine-based aromatic polyamides
FTIR, 1H and 13C NMR spectroscopic techniques were used to identify the chemical structures of the dicyano intermediates, the carboxylic acid monomer and the resultant poly(amine-amide)s. These aromatic poly(amine-amide)s were found to be readily soluble in a variety of organic solvents and could afford strong and tough films via solution casting. They exhibited excellent thermal stability associated with high glass transition temperatures (Tg＝248.32-290.46℃) and 10 % weight loss temperatures in excess of 522℃ in nitrogen. In dilute NMP solution, these polymers exhibited a medium to strong photoluminescence in the blue region at (425-443) nm. Cyclic voltammetry of the poly(amine-amide)s films cast onto an ITO-coated glass substrate in dry acetonitrile containing 0.1 M of Tetrabutylammonium perchlorate(TBAP) as an electrolyte exhibited one oxidation redox couples (Eonset) at (1.30-1.37) V vs Ag/AgCl , and revealed electrochromic characteristics with a color change from pale yellow to blue at applied potentials switched between 0.0 and 1.6 V.