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首页> 外文期刊>Chemistry: A European journal >Evolution from lyotropic liquid crystal to helical fibrous organogel of an achiral fluorescent twin-tapered bi-1,3,4-oxadiazole derivative
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Evolution from lyotropic liquid crystal to helical fibrous organogel of an achiral fluorescent twin-tapered bi-1,3,4-oxadiazole derivative

机译：从喉液晶到螺旋纤维有机凝胶的螺旋纤维单锥肌凝胶的演变

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摘要

We report an unprecedented hierarchical self-assembly of an achiral twin-tapered bi-1,3,4-oxadiazole derivative (2,2-bis(3,4,5-trioctanoxyphenyl)- bi-1,3,4-oxadiazole, BOXD-T8). This molecule can form a layer-structured lyotropic liquid crystal and further forms a helical fibrous organogel in DMF at concentrations above 0.6wt%. The self-assembly process of BOXD-T8 in DMF is accompanied by a change in its fluorescence. The pitches of the helical fibers are non-uniform, and both left- and right-handed helical fibers are observed in equal quantities. Intermolecular π-π interactions between aromatic segments have been demonstrated to be the driving force for aggregate formation. This helical structure of BOXD-T8 is dependent on the solvent, concentration, and the layer-structured intermediate liquid-crystalline state. Supramolecular chirality: An unprecedented hierarchical self-assembly of an achiral fluorescent twin-tapered bi-1,3,4-oxadiazole derivative (BOXD-T8) from lyotropic liquid crystal to helical fibrous organogel has been observed in DMF at concentrations above 0.6wt% (see figure). The helical structure of BOXD-T8 is dependent on the solvent, the concentration, and the intermediate layer-structured lyotropic liquid-crystalline state.
机译：我们报告了一种前所未有的逐步的双锥形二甲基1,3,4-氧代唑衍生物（2,2-双（3,4,5-三辛氧基苯基） - Bi-1,3,4-恶二唑， boxd-t8）。该分子可以形成层状的溶致液晶，并在0.6wt％的浓度下进一步在DMF中形成螺旋纤维有机凝胶。 DMF中BoxD-T8的自组装过程伴随着其荧光的变化。螺旋纤维的间距是不均匀的，并且左右和右手螺旋纤维以相等的量观察。已经证明了芳族区段之间的分子间π-π相互作用是聚集体形成的驱动力。这种螺旋-T8的螺旋结构取决于溶剂，浓度和层结构的中间液晶态。超分子手性：在低于0.6wt％的浓度下，在DMF中观察到从喉液晶与螺旋纤维有机凝胶到螺旋纤维有机凝胶的前所未有的荧光双锥形二锥形二叠氮衍生物（BOXD-T8）的前所未有的分层自组装。 （见图）。 BAND-T8的螺旋结构取决于溶剂，浓度和中间层结构的旋转液 - 结晶状态。

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  • 来源
    《Chemistry: A European journal》 |2011年第12期|共7页
  • 作者

    Qu S.; Wang L.; Liu X.; Li M.;

  • 作者单位

    Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China;

    Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China;

    Key Laboratory of Excited State Processes Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130033 China;

    Key Laboratory of Automobile Materials (Jilin University) Jilin University Ministry of Education Changchun 130012 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 应用化学;
  • 关键词

    helical structures; liquid crystals; organogels; oxadiazoles; self-assembly;

    机译：螺旋结构;液晶;有机凝胶;氧代Zoles;自我组装;

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