Synthesis, characterization and electrochromic properties of polyamides having triphenylamine derivatives

• Published in: Polymer bulletin (Berlin, Germany) Germany), 2016-09, Vol.73 (9), p.2427-2438
• Main Authors: Lee, Myung Jun, Kwak, Young Jun, Seok, Woong Chul, Lee, Seung Woo
• Format: Article
• Language: English
• Subjects: Acids; Anisidine; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Complex Fluids and Microfluidics; Diamines; Electrical properties; Electrochromism; Electrodes; Energy bands; Energy gap; Ethanol; Fluorides; Fourier transforms; Monomers; Nitrogen; NMR; Nuclear magnetic resonance; Organic Chemistry; Original Paper; Oxidation; Physical Chemistry; Polyamide resins; Polycondensation reactions; Polymer Sciences; Polymerization; Polymers; Soft and Granular Matter; Spectrum analysis; Spin coating; Substitution reactions; Temperature; Thermodynamic properties; Thin films
• ISSN: 0170-0839; 1436-2449
• DOI: 10.1007/s00289-016-1670-y

Three diamine monomers with methoxy group substituents in the ortho , meta and para positions in the triphenylamine moiety were synthesized by a nucleophilic aromatic substitution reaction using 4-fluoronitrobenzene with o - , m - and p -anisidine, respectively. From these diamine monomers, electrochromic polyamides were synthesized by a direct polycondensation reaction. 1 H nuclear magnetic resonance and Fourier transform infrared spectroscopy confirmed the synthesis of the electrochromic polyamides. The measured inherent viscosity of the polyamides was in the range 0.65–0.78 dL/g. All the polyamides showed good thermal properties and formed good spin-coated thin films. The energy band gap and oxidation onset potential, E onset , for the polyamide films was in the order of tere- p -OCH3TPA polyamide