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首页> 外文期刊>RSC Advances >Extreme enhancement of secondary chirality through coordination-driven steric changes of terpyridyl ligand in glutamide-based molecular gels
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Extreme enhancement of secondary chirality through coordination-driven steric changes of terpyridyl ligand in glutamide-based molecular gels

机译：通过协调驱动的基于谷氨酰胺的分子凝胶的配位驱动的空间变化来极好地提高二吡啶配体的间距变化

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摘要

Aggregation-induced chirality is potentially useful in sensor technology applications. Herein we show extreme enhancement of secondary chirality through coordination-driven steric changes of terpyridyl ligand in molecular gels. The secondary chirality reflecting on enhancement of chiral signals (i.e., circular dichroism (CD) and circularly polarised luminescence (CPL)) of the molecular gels formed from glutamide-attached terpyridine (G-tpy) is extremely enhanced by the coordination of its terpyridyl groups to metal ions such as Cu2+, Zn(2+)and Ru2+, which is due to dramatic changes in the stacked structure of the chromophore groups through the formation of metal ion complex. Metal-free terpyridine exists in a non-planar geometry, which suppress pi-pi stacking interactions among aggregates. The planarity of the terpyridyl group is improved through metal-ion complexation, which induces the metal-ion-coordinated terpyridyl groups to stack. The thermal stabilities of the CD signals are strongly affected by the metal-ion species. CPL signal is generated in the molecular gel formed fromG-tpy-Zn(2+)complex accompanied by chelation-enhanced fluorescence. It is expected that large and sensitive coordination-driven secondary chirality signals (CD and CPL) are useful for sensing guest molecules and the surrounding environment.
机译：聚集诱导的手性在传感器技术应用中可能有用。在此，我们通过分子凝胶中的噻吩基配体的协调驱动的空间变化来表现出极致的继发性血管性。反映由谷氨酰胺附着的三吡啶（G-TPY）形成的分子凝胶的手性信号增强（即圆形二中型（CD）和圆偏振发光（CPL）的二次培养性通过其噻嗪基的配位而极大地增强金属离子如Cu 2 +，Zn（2+）和Ru2 +，这是由于通过形成金属离子络合物的发色团的堆叠结构的显着变化。不平面几何形状存在无金属噻吩并抑制聚集体之间的PI-PI堆叠相互作用。通过金属离子络合改善萜烯基的平坦性，其诱导金属离子配位的吡啶基堆叠。 CD信号的热稳定性受金属离子物种的强烈影响。 CPL信号在由螯合增强的荧光伴随的螯合螯合物形成的来自-TPY-Zn（2+）复合物中形成的分子凝胶中。预期大敏感的协调驱动的二次手术信号（CD和CPL）可用于传感访客分子和周围环境。

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  • 来源
    《RSC Advances》 |2020年第50期|共6页
  • 作者

    Takafuji Makoto; Kawahara Tomoki; Sultana Nahid; Ryu Naoya; Yoshida Kyohei; Kuwahara Yutaka; Oda Reiko; Ihara Hirotaka;

  • 作者单位

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

    Kumamoto Ind Res Inst Mat Dev Dept Higashi Ku 3-11-38 Higashimachi Kumamoto 8620901 Japan;

    Univ Bordeaux Inst Chim &

    Biol Membranes &

    Nanoobjets UMR5248 CBMN CNRS Inst Polytech Bordeaux 2 Rue Robert Escarpit F-33607 Pessac France;

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

    Univ Bordeaux Inst Chim &

    Biol Membranes &

    Nanoobjets UMR5248 CBMN CNRS Inst Polytech Bordeaux 2 Rue Robert Escarpit F-33607 Pessac France;

    Kumamoto Univ Dept Appl Chem &

    Biochem Chuo Ku 2-39-1 Kurokami Kumamoto 8608555 Japan;

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