New triphenylamine-based aromatic diamine and dicarboxylic acid monomers, namely 3,5-dimethy1-4',4 ''-diaminotriphenylamine (3a) and 3,5-dimethyl-4',4 ''-dicarboxytriphenylamine (3b), were successfully synthesized by well-established procedures. Two series of novel aromatic polyamides 5a-5h,and 7a-7e with 3,5-dimethyltriphenylamine units were prepared respectively from phosphorylation condensation of 3a with commercially available aromatic dicarboxylic acids and from 3b with commercially available aromatic diamines. Almost all the polyamides were amorphous and could be solution-cast into flexible, transparent, and tough films. All the polyamides exhibited useful levels of thermal stability, such as high glass-transition temperatures of 245-322 degrees C, 10% weight-loss temperatures in excess of 500 degrees C, and char yields at 800 degrees C in nitrogen higher than 63%. Cyclic voltammograms of the 5 series polyamides exhibited a reversible oxidation wave with E-1/2 around 0.95 V versus Ag/AgCl in acetonitrile solution. The polymer films revealed excellent stability of electrochromic characteristics, with a color change from neutral state pale yellowish to green doped form at applied potentials ranging from 0 to 1.25 V. (C) 2016 Elsevier B.V. All rights reserved.