Modular Molecular Self-Assembly for Diversified Chiroptical Systems.,Small

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Modular Molecular Self-Assembly for Diversified Chiroptical Systems.
Small ( IF 13.0 ) Pub Date : 2020-06-23 , DOI: 10.1002/smll.202002036
Zhuoer Wang ₁ , Heng Zhang ₁ , Aiyou Hao ₁ , Yanli Zhao ₂ , Pengyao Xing _{1,

2}

Affiliation

Bottom‐up multicomponent molecular self‐assembly is an efficient approach to fabricate and manipulate chiral nanostructures and their chiroptical activities such as the Cotton effect and circular polarized luminescence (CPL). However, the integrated coassembly suffers from spontaneous and inherent systematic pathway complexity with low yield and poor fidelity. Consequently, a rational design of chiral self‐assembled systems with more than two components remains a significant challenge. Herein, a modularized, ternary molecular self‐assembly strategy that generates chiroptically active materials at diverse hierarchical levels is reported. N‐terminated aromatic amino acids appended with binding sites for charge transfer and multiple hydrogen bonds undergo the evolution of supramolecular chirality with unique handedness and luminescent color, generating abundant CPL emission with high luminescence dissymmetry factor values in precisely controlled modalities. Ternary coassembly facilitates high‐water‐content hydrogel formation constituted by super‐helical nanostructures, demonstrating a helix to toroid topological transition. This discovery would shed light on developing complicated multicomponent systems in mimicking biological coassembly events.

中文翻译：

多种脊椎系统的模块化分子自组装。

自下而上的多组分分子自组装是一种有效的方法，用于制造和操作手性纳米结构及其手性活性，例如棉花效应和圆偏振发光（CPL）。然而，集成的组装件遭受自发的和固有的系统途径复杂性，低产量和低保真度。因此，具有两个以上组件的手性自组装系统的合理设计仍然是一个巨大的挑战。本文报道了一种模块化的三元分子自组装策略，该策略可在不同的层次级别生成手性活性物质。ñ带有电荷转移结合位点和多个氢键的末端封端的芳香族氨基酸经历了超分子手性的演化，具有独特的手性和发光色，可在精确控制的模式下产生具有高发光不对称因子值的丰富CPL发射。三元共组装促进了由超螺旋纳米结构构成的高含水量水凝胶的形成，表明了从螺旋到环形的拓扑转变。这一发现将为模仿生物共组装事件开发复杂的多组分系统提供启示。

更新日期：2020-07-28

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