Orthogonal Self‐Assembly of Cyclodextrin‐Decorated Noble Metal Nanoparticles via Photoresponsive Molecular Recognition in Aqueous Solution,ChemNanoMat

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Orthogonal Self‐Assembly of Cyclodextrin‐Decorated Noble Metal Nanoparticles via Photoresponsive Molecular Recognition in Aqueous Solution
ChemNanoMat ( IF 2.6 ) Pub Date : 2020-09-21 , DOI: 10.1002/cnma.202000468
Maximilian Niehues ₁ , Julian Simke ₁ , Bart Jan Ravoo ₂

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Control over the self‐assembly of mixed nanoparticles (NP) is a challenging but versatile concept for the bottom‐up fabrication of novel nanomaterials. Moreover, stimulus‐responsive self‐assembly is fundamental to the development of adaptive and intelligent materials. In this study, we demonstrate the orthogonal self‐assembly of cyclodextrin (CD) decorated noble metal NP. Utilizing the guest selectivity of αCD and γCD, divalent photoresponsive supramolecular crosslinkers were identified and applied in selective NP assembly. By design of specific crosslinkers, narcissistic as well as social self‐sorting of sub 10 nm metal NP was enabled. Irradiation experiments confirmed that the aggregation process is induced by photoresponsive host‐guest chemistry, which allows to form and dissolve the NP aggregates over several cycles and to photo‐initiate the NP aggregation. The molecular recognition as well as the specific response of CD‐functionalized NP show significant potential in the reversible self‐assembly of inorganic‐organic hybrid nanomaterials in aqueous solution.

中文翻译：

水溶液中光响应分子识别的环糊精修饰的贵金属纳米粒子的正交自组装

对于自底向上制造新型纳米材料，控制混合纳米颗粒（NP）的自组装是一个具有挑战性但用途广泛的概念。此外，刺激响应自组装是自适应和智能材料开发的基础。在这项研究中，我们证明了环糊精（CD）装饰的贵金属NP的正交自组装。利用αCD和γCD的客体选择性，鉴定了二价光响应性超分子交联剂并将其应用于选择性NP组装中。通过设计特定的交联剂，可以实现亚10纳米金属NP的自恋和社会自选。辐照实验证实聚集过程是由光响应性客体化学诱导的，这样可以在多个周期内形成和溶解NP聚集体，并光引发NP聚集体。CD官能化NP的分子识别和特异性反应在水溶液中无机-有机杂化纳米材料的可逆自组装中显示出巨大潜力。

更新日期：2020-09-21

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