Multifunctional donor–acceptor conjugated polymers containing isoindigo and benzothiadiazole moieties for electrochromic, photoelectric sensor, 2,4,6-trinitrophenol detection and resistance memory device

Autor:	Yan Wang, Wei Zhang, Caiyu Yang, Xiaoxue Lin, Dongxu Li, Qingyi Lu, Yanyu Gao, Wen Wang, Haijun Niu
Rok vydání:	2021
Předmět:	chemistry.chemical_classification Photoluminescence Materials science 020502 materials Mechanical Engineering 02 engineering and technology Polymer Conjugated system Photochemistry Acceptor Stille reaction 0205 materials engineering chemistry Mechanics of Materials Electrochromism General Materials Science Quantum efficiency Solubility
Zdroj:	Journal of Materials Science. 56:12001-12017
ISSN:	1573-4803 0022-2461
DOI:	10.1007/s10853-021-05952-9
Popis:	Six novel donor–acceptor conjugated polymers were designed and synthesized by the Stille coupling reaction of triarylamine derivatives as donor units with isoindigo derivative or benzothiadiazole as acceptor units. These polymers have good solubility and film-forming properties in common organic solvents. The char yields of polymers in nitrogen atmosphere at 800 °C range from 34 to 60%. In particular, these conjugated polymers exhibit high photoluminescence (PL) quantum efficiency (up to 42.9%). These polymers demonstrate two pairs of redox peaks with low onset voltages (0.51 V vs. Ag/AgCl for P5) and narrow band gaps (Eg = 2.52 ~ 2.95 eV). The colors of all polymer films change significantly with the applied voltage increasing. Moreover, the polymers show high coloring efficiency (up to 163%) and maintain good electrochromic (EC) cycle stability over 500 s. In addition, excellent results in terms of memory storage (ON/OFF = 1.2 × 104), 2,4,6-Trinitrophenol (TNP) detection (Ksv = 45,790 M-1) can meet the requirements of multifunctional materials.
Databáze:	OpenAIRE
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