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Two electropolymerizable monomers with a methoxytriphenylamine core linked via amide groups to two triphenylamine (TPA) or N-phenylcarbazole (NPC) terminal groups, namely 4,4′-bis(4-diphenylaminobenzamido)-4 ”-methoxytriphenylamine (MeOTPA-(TPA)(2)) and 4,4′-bis(4 ”-(carbazol-9-yl)benzamido)-4-methoxytriphenylamine (MeOTPA-(NPC)(2)), were synthesized and characterized by FTIR and H-1 NMR spectroscopy, mass spectrometry, and cyclic voltammetry. The electrochemical polymerization reactions of these MeOTPA-cored monomers over indium tin oxide (ITO) electrode allow the generation of electroactive poly(amide-amine) films. The electro-generated polymer films exhibited reversible redox processes and multi-colored electrochromic behaviors upon electro-oxidation, together with moderate coloration efficiency and cycling stability. The optical density changes (Delta OD) were observed in the range of 0.18-0.68 at specific absorption maxima, with the calculated coloration efficiencies of 42-123 cm(2)/C. Single-layer electrochromic devices using the electrodeposited polymer films as active layers were fabricated for the preliminary investigation of their electrochromic applications.
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Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics