Novel aromatic polyamides containing 2‐diphenylamino‐(9, 9‐dimethylamine) units as multicolored electrochromic and high‐contrast electrofluorescent materials. Issue 2 (28th October 2016)

• Record Type: Journal Article
• Authors: Sun, Ningwei; Zhou, Ziwei; Chao, Danming; Chu, Xiaojing; Du, Yinlong; Zhao, Xiaogang; Wang, Daming; Chen, Chunhai
• Is Part Of: Journal of polymer science. Volume 55:Issue 2(2017)
• Page Start: 213
• Page End: 222
• Publication Date: 2016-10-28
• Subjects: electrochemistry -- electrochromism -- electrofluorescence -- fluorene -- polyamides -- triphenylamine; 547
• DOI: 10.1002/pola.28400
• Languages: English
• ISSNs: 0887-624X

Abstract

ABSTRACT: A series of electrochromic and photoluminescence‐active polyamides 4a‐4e were prepared from a novel dicarboxylic acid, N, N ‐di(4‐carboxyphenyl)‐2‐amino‐9, 9‐dimethylfluorene, and five diamines via a condensation polymerization. These polyamides were amorphous and readily soluble in many solvents. The glass transition temperatures were in the range of 281–339 °C and the 10% weight loss temperatures in nitrogen were in excess of 490 °C. The polyamides exhibited strong fluorescence in either solution or solid states. The polyamides 4a‐4d showed reversible electrochemical redox with color changing from colorless to grey‐green. Specially, the polyamide 4e with 2‐diphenylamino‐(9, 9‐dimethylamine) group in both diamine and dicarboxylic acid residues exhibited multicolored electrochromic behaviors. Furthermore, the fluorescence of these polyamides could be reversibly electroswitched with a high contrast up to 221.4, enabling their potential applications in dual‐switching electrochromic/electrofluorescent materials. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem.2017, 55, 213–222 Abstract : A series of polyamides with 2‐diphenylamino‐(9, 9‐dimethylamine) units were readily prepared, which exhibited stable electrochromic and high‐contrast electrofluorescent properties.