Orthogonal Self‐Assembly of Cyclodextrin‐Decorated Noble Metal Nanoparticles via Photoresponsive Molecular Recognition in Aqueous Solution
Orthogonal Self‐Assembly of Cyclodextrin‐Decorated Noble Metal Nanoparticles via Photoresponsive Molecular Recognition in Aqueous Solution
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DOI：
10.1002/cnma.202000468
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发表时间：
2020-09
期刊：
影响因子：
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通讯作者：
Maximilian H. Niehues;Julian Simke;B. Ravoo
中科院分区：
文献类型：
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作者：
Maximilian H. Niehues;Julian Simke;B. Ravoo
控制混合纳米颗粒（NP）的自组装是一个具有挑战性但通用的概念，用于自下而上制造新型纳米材料。此外，刺激响应自组装是自适应和智能材料发展的基础。在这项研究中，我们展示了环糊精（CD）修饰的贵金属NP的正交自组装。利用α-CD和γ-CD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组装NP。通过设计特定的交联剂，实现了亚10 nm金属NP的自恋和社会自分类。 辐照实验证实，聚集过程是由光响应性主客体化学诱导的，这允许在几个循环中形成和溶解NP聚集体并光引发NP聚集。CD功能化NP的分子识别以及特异性响应在无机-有机杂化纳米材料在水溶液中的可逆自组装中显示出显着的潜力。
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.