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Solution-processable low-bandgap 3-fluorothieno-[3,4-b]thiophene-2-carboxylate-based conjugated polymers for electrochromic applications

机译:用于电致变色应用的溶液可加工的低带隙3-氟硫蛋白[3,4-B]噻吩-2-羧酸酯类缀合聚合物

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摘要

In this paper, a series of low-bandgap donor-acceptor (D-A) conjugated polymers with 3-fluorothieno [3,4-b] thiophene-2-carboxylate (FTT) as an acceptor and ethylenedioxythiophene (EDOT) (P1), acyclic dioxythiophene (AcDOT) (P2) or propylenedioxythiophene (ProDOT) (P3) as donors were synthesized via Stille polymerization. The resultant polymers have good solubility in organic solvents. The polymers were characterized by gel permeation chromatography (GPC), nuclear magnetic resonance spectroscopy (NMR) and thermogravimetric analysis (TGA). Their electrochemical, morphological and electrochromic (EC) properties were investigated, and their absorption-transmission type electrochromic devices (ECDs) were fabricated and characterized. In their neutral states, the polymers displayed deep magenta (P1) to blue (P2, P3) hues, and upon electrochemical oxidation, they revealed grey tones with good optical contrasts (19-37 and 57-58% in visible and near-infrared (NIR) regions, respectively), good coloration efficiencies (158-380 and 279-378 cm(2) C-1 for visible and NIR regions, respectively) and reasonable redox stability (retaining 64-80% original optical contrast after 1000 cycles) under ambient conditions and without any encapsulation of the ECDs.
机译:本文中,一系列低带隙供体 - 受体(DA)与3-氟噻吩[3,4-B]噻吩-2-羧酸酯(FTT)的缀合聚合物作为受体和亚乙二氧噻吩(Edot)(P1),无循环通过STILLE聚合合成作为供体作为供体的二氧噻吩(ACDOT)(P2)或丙二氧基噻吩(P3)。所得聚合物在有机溶剂中具有良好的溶解度。通过凝胶渗透色谱(GPC),核磁共振光谱(NMR)和热重分析(TGA)表征聚合物。研究了它们的电化学,形态学和电致变色(EC)性质,并制备了它们的吸收 - 透射型电致变色装置(ECD)。在它们的中性状态中,聚合物显示深红色(P1)到蓝色(P2,P3)色调,并且在电化学氧化时,它们揭示了具有良好光学对比(19-37和57-58%的灰色色调(19-37和57-58%,可见和近红外) (NIR)区域,分别是良好的着色效率(分别为可见的和裸体区域的158-380和279-378cm(2)C-1)和合理的氧化还原稳定性(在1000次循环后保持64-80%原始光学对比度)在环境条件下,没有任何封装ECD。

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  • 来源
    《RSC Advances》 |2015年第117期|共8页
  • 作者单位

    ASTAR Inst Mat Res &

    Engn Innovis Singapore 138634 Singapore;

    ASTAR Inst Mat Res &

    Engn Innovis Singapore 138634 Singapore;

    ASTAR Inst Mat Res &

    Engn Innovis Singapore 138634 Singapore;

    ASTAR Inst Mat Res &

    Engn Innovis Singapore 138634 Singapore;

    ASTAR Inst Mat Res &

    Engn Innovis Singapore 138634 Singapore;

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  • 正文语种 eng
  • 中图分类 化学;
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