High-contrast electrochromic and electrofluorescent dual-switching materials based on 2-diphenylamine-(9, 9-diphenylfluorene)-functionalized semi-aromatic polymers. Issue 70 (12th July 2016)

• Record Type: Journal Article
• Authors: Sun, Ningwei; Meng, Shiyao; Zhou, Ziwei; Yao, Jianan; Du, Yinlong; Wang, Daming; Zhao, Xiaogang; Zhou, Hongwei; Chen, Chunhai
• Is Part Of: RSC advances. Volume 6:Issue 70(2016)
• Page Start: 66288
• Page End: 66296
• Publication Date: 2016-07-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra12174h
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Two kinds of 2-diphenylamine-(9, 9-diphenylfluorene)-functionalized semi-aromatic polymers were prepared and they exhibited stable and high-contrast electroswitching in both coloration and emission. Abstract : Two kinds of electrochromic and photoluminescence-active semi-aromatic polyamide and polyimide were prepared via condensation polymerization from a novel diamine, N, N -di-(4-aminophenyl)-2-amino-9, 9-diphenylfluorene, with cycloaliphatic dicarboxylic acid and dianhydride, respectively. These polymers showed excellent solubility and increased thermal stability with 10% weight loss in excess of 450 °C in a N2 atmosphere. Due to the stable electrochemistry and improved solid-state fluorescence properties, the polymer films exhibited repeatable and high-contrast electroswitching in both coloration and emission (Δ T % = 80–85%, I off / I on = 152.1–177.9). Especially, the polyamide still showed excellent electroswitching stability even after hundreds of cycles.