Novel aromatic polyamides containing 2‐diphenylamino‐(9,9‐dimethylamine) units as multicolored electrochromic and high‐contrast electrofluorescent materials |
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| Authors: | Ningwei Sun Ziwei Zhou Danming Chao Xiaojing Chu Yinlong Du Xiaogang Zhao Daming Wang Chunhai Chen |
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| Affiliation: | 1. Alan G. MacDiarmid Laboratory, Department of Chemistry, Jilin University, Changchun, People's Republic of China;2. State Key Laboratory of Supramolecular Structure and Materials, Department of Chemistry, Jilin University, Changchun, People's Republic of China;3. Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Science, Yantai, People's Republic of China |
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| 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 |
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| Keywords: | electrochemistry electrochromism electrofluorescence fluorene polyamides triphenylamine |
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