Red, green, and blue electrochromism in ambipolar poly(amine-amide-imide)s based on electroactive tetraphenyl-p-phenylenediamine units
Journal
Journal of Polymer Science, Part A: Polymer Chemistry
Journal Volume
48
Journal Issue
21
Pages
4747-4757
Date Issued
2010
Author(s)
Abstract
Abstract A series of novel poly(amine–amide–imide)s (PAAIs) based on tetraphenyl‐ p ‐phenylenediamine (TPPA) units showing anodically/cathodically electrochromic characteristic with three primary colors [red, green, and blue (RGB)] were prepared from the direct polycondensation of the TPPA‐based diamine monomer with various aromatic bis(trimellitimide)s. These multicolored electrochromic polymers were readily soluble in polar organic solvents and showed excellent thermal stability associated with high glass‐transition temperatures (288–314 °C) and high‐char yield (higher than 60% at 800 °C in nitrogen). The PAAI films revealed electrochemical oxidation and reduction accompanied with high contrast of optical transmittance color changes from the pale yellow neutral state to the green/blue oxidized state and red reduced state, respectively. The electrochromic films had high‐coloration efficiency (CE = 178 and 242 cm 2 /C at the first and the second stages, respectively), low‐switching time, and good redox stability, which still retained a high electroactivity after long‐term redox cycles. © 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2010
Type
journal article