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

  • Polymers & biopolymers
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Abstract

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.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51773053, 51373049) and the Heilongjiang Province Foundation for Returners from Oversea (LC2018024)

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Authors and Affiliations

  1. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Department of Macromolecular Science and Engineering, School of Chemical, Chemical Engineering and Materials, Heilongjiang University, Harbin, 150086, People’s Republic of China

    Xiaoxue Lin, Qingyi Lu, Caiyu Yang, Yan Wang, Wei Zhang, Dongxu Li, Yanyu Gao & Haijun Niu

  2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150080, People’s Republic of China

    Wen Wang

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  1. Xiaoxue Lin
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  2. Qingyi Lu
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Correspondence to Haijun Niu or Wen Wang.

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Lin, X., Lu, Q., Yang, C. et al. Multifunctional donor–acceptor conjugated polymers containing isoindigo and benzothiadiazole moieties for electrochromic, photoelectric sensor, 2,4,6-trinitrophenol detection and resistance memory device. J Mater Sci 56, 12001–12017 (2021). https://doi.org/10.1007/s10853-021-05952-9

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