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Construction and Molecular Understanding of an Unprecedented, Reversibly Thermochromic Bis-Polydiacetylene

机译：前所未有的可逆热致变色双聚二乙炔的构建和分子理解

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摘要

A new type of bis-PDA, in which two PDAs are linked via an intervening p-phenylene group, is developed. The Bis-PDA-Ph displays exceptional thermochromic reversibility owing to the presence of unique hydrophobic interactions between alkyl chains as well as aryl moieties. The Bis-PDA-Ph has a well-packed structure that causes it to display a clear blue to red colorimetric transition at elevated temperatures. To elucidate the molecular origin of the thermochromic response, a theoretical simulation of the new PDA, the results of which successfully explain the thermochromic reversibility phenomenon, is conducted. Furthermore, Bis-PDA-Ph-embedded polymer fibers are used as a thermochromic sensor material. It displays excellent reversibility between 20-120 ℃, which is the largest temperature range reported thus far for PDA based sensors. Finally, transient absorption spectroscopy is employed for the first time to analyze the temperature-dependent fluorescence change of the new PDA.
机译：开发了一种新型的bis-PDA，其中两个PDA通过一个中间的对亚苯基连接。由于烷基链和芳基部分之间存在独特的疏水性相互作用，Bis-PDA-Ph具有出色的热致变色可逆性。 Bis-PDA-Ph具有结构紧凑的结构，可使其在高温下显示出清晰的蓝色到红色的比色过渡。为了阐明热致变色反应的分子起源，进行了新PDA的理论模拟，其结果成功地解释了热致变色可逆性现象。此外，将Bis-PDA-Ph嵌入的聚合物纤维用作热致变色传感器材料。它在20-120℃之间显示出优异的可逆性，这是迄今为止基于PDA的传感器报道的最大温度范围。最后，首次采用瞬态吸收光谱法分析了新型PDA随温度变化的荧光变化。

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  • 来源
    《Advanced Functional Materials》 |2014年第24期|3699-3705|共7页
  • 作者

    Songyi Lee; Joonseong Lee; Minji Lee; Yu Kyung Cho; Junwoo Baek; Jinwook Kim; Sungnam Park; Myung Hwa Kim; Rakwoo Chang; Juyoung Yoon;

  • 作者单位

    Department of Chemistry and Nano Science Global Top 5 Research Program EwhaWomans University Seoul 120-750, Korea;

    Department of Chemistry Kwangwoon University Seoul 139-701, Korea;

    Department of Chemistry and Nano Science Global Top 5 Research Program EwhaWomans University Seoul 120-750, Korea;

    Department of Chemistry and Nano Science Global Top 5 Research Program EwhaWomans University Seoul 120-750, Korea;

    Department of Chemistry Korea University Seoul 136-701, Korea;

    Department of Chemistry Korea University Seoul 136-701, Korea;

    Department of Chemistry Korea University Seoul 136-701, Korea;

    Department of Chemistry and Nano Science Global Top 5 Research Program EwhaWomans University Seoul 120-750, Korea;

    Department of Chemistry Kwangwoon University Seoul 139-701, Korea;

    Department of Chemistry and Nano Science Global Top 5 Research Program EwhaWomans University Seoul 120-750, Korea;

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