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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Excited-State Dynamics of Dithienylethenes Functionalized for Self-Supramolecular Assembly
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Excited-State Dynamics of Dithienylethenes Functionalized for Self-Supramolecular Assembly

机译：自超分子组装官能化二苯基乙烯的激发状态动态

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摘要

The photoswitching and competitive processes of two photochromic dithienylethenes (DTEs) functionalized at both sides with 2-ureido-4[1H]-pyrimidone (UPy) quadruple hydrogen-bonding recognition patterns have been investigated with NMR experiments, ultrafast spectroscopy, and density functional theory (DFT) calculations. The originality of these molecules is their ability to form large supramolecular assemblies induced by light for the closed form (CF) species while the open form (OF) species exist as small oligomers. Photochromic parameters have been determined and photochemical pathways have been rationalized with clear distinction between the antiparallel (OF-AP) and parallel (OF-P) species. A new photocyclization pathway via triplet manifold has been evidenced. The effect of the supramolecular assembly on the photochemical response is discussed. Unlike the photoreversion process, which is unaffected by supramolecular assembly, rate constants of the photocyclization reaction and intersystem crossing process are sensitive to the presence of small OF oligomers.
机译：在两侧与官能化的光致变色2个dithienylethenes（数据终端设备）的光控和竞争过程2-脲基-4- [1H] - 嘧啶酮（UPy）四重氢键的识别模式已经研究用NMR实验，超快光谱，和密度泛函理论（DFT）计算。这些分子的独创性是它们以形成用于封闭形式（CF）物种引起的光的大超分子组装而开放的形式（OF）物种如小低聚物存在的能力。光致变色的参数已被确定和光化学途径已经合理化与反平行（OF-AP）和平行（OF-P）物种之间明显的区别。通过三重歧管的新途径photocyclization已经证明。被讨论的超分子组装体的对光化学反应的影响。不同于光逆转过程，这是由超分子组装的影响，所述photocyclization反应和系统间跨越过程的速率常数是小的寡聚物的存在是敏感的。

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    I. Hamdi; G. Buntinx; O. Poizat; A. Perrier; L. Le Bras; S. Delbaere; S. Barrau; M. Louati; M. Takeshita; K. Tokushige; M. Takao; S. Alo?se;

  • 作者单位

    Université Lille CNRS UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman F-59000 Lille France;

    Université Lille CNRS UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman F-59000 Lille France;

    Université Lille CNRS UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman F-59000 Lille France;

    University Paris Diderot Sorbonne Paris Cité 75205 Paris Cedex 13 France;

    Chimie ParisTech PSL Research University CNRS Institut de Recherche de Chimie Paris (IRCP) F-75005 Paris France;

    Université Lille CNRS UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman F-59000 Lille France;

    Université Lille CNRS INRA ENSCL UMR 8207 - UMET - Unité Matériaux et Transformations F-59000 Lille France;

    Université Lille CNRS UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman F-59000 Lille France;

    Department of Chemistry and Applied Chemistry Faculty of Science and Engineering Saga University Honjo 1 Saga 840-8502 Japan;

    Department of Chemistry and Applied Chemistry Faculty of Science and Engineering Saga University Honjo 1 Saga 840-8502 Japan;

    Department of Chemistry and Applied Chemistry Faculty of Science and Engineering Saga University Honjo 1 Saga 840-8502 Japan;

    Université Lille CNRS UMR 8516 - LASIR - Laboratoire de Spectrochimie Infrarouge et Raman F-59000 Lille France;

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  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;
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