Self-Assembled Nanohelixes Driven by Host-Guest Interactions and Metal Coordination.

IF 16.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Xin-Yue Lou, Kun Zhang, Yujie Bai, Siyuan Zhang, Yuanyuan Li, Ying-Wei Yang
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Abstract

Helical nanostructures fabricated via the self-assembly of artificial motifs have been a captivating subject because of their structural aesthetics and multiple functionalities. Herein, we report the facile construction of a self-assembled nanohelix (NH) by leveraging an achiral aggregation-induced emission (AIE) luminogen (G) and pillar[5]arene (H), driven by host-guest interactions and metal coordination. Inspired by the "sergeants and soldiers" effect and "majority rule" principle, the host-guest complexation between G and H is employed to fixate the twisted conformation of G for the generation of "contortion sites", which further induced the emergence of helicity as the 1D assemblies are formed via Ag(I) coordination and hexagonally packed into nano-sized fibers. The strategy has proved feasible in both homogeneous and heterogeneous syntheses. Along with the formation of NH, boosted luminescence and enhanced productivity of reactive oxygen species (ROS) are afforded because of the efficient restriction on G, indicating the concurrent regulation of NH's morphology and photophysical properties by supramolecular assembly. In addition, NH also exhibits the capacity for bacteria imaging and photodynamic antibacterial activities against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coli).

由主客体相互作用和金属配位驱动的自组装纳米螺旋。
通过人工图案的自组装制造出的螺旋纳米结构因其结构美观和功能多样而一直是一个引人入胜的课题。在此,我们报告了利用非手性聚集诱导发射(AIE)发光剂(G)和支柱[5]炔(H),在主客体相互作用和金属配位的驱动下,简便地构建了自组装纳米螺旋(NH)。受 "军士 "效应和 "少数服从多数 "原则的启发,G 和 H 之间的宿主-宿主复合物被用来固定 G 的扭曲构象以产生 "变形位点",当通过 Ag(I) 配位形成一维集合体并以六角形包装成纳米级纤维时,这进一步诱导了螺旋性的出现。事实证明,这种策略在均相和异相合成中都是可行的。在形成 NH 的同时,由于对 G 的有效限制,还提高了发光效率和活性氧(ROS)的生产率,这表明超分子组装同时调节了 NH 的形态和光物理性质。此外,NH 还具有细菌成像能力和针对金黄色葡萄球菌(S. aureus)和大肠杆菌(E. coli)的光动力抗菌活性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
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