Abstract This paper reports the oxidative reaction of triphenylamine (TPA)-based polyamide films. A two-dimensional (2D) gradient mapping method and 2D correlation analysis were applied to the ultraviolet–visible (UV–Vis) and infrared (IR) spectra of TPA-based polyamide films to examine the spectral changes induced by electrochemical oxidation. The benzenoid and quinoid units were present together during the electrochemical oxidation of TPA- ...
