Preparation of Ultrasmall AIE Nanoparticles with Tunable Molecular Packing via Freeze Assembly

IF 9.6 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2023-01-30 DOI:10.1021/acs.nanolett.2c04557
Zequan Yan, Junqiang Mao, Xiang Hao, Bo Guan, Zheng Zhao, Xin Zhou*, Ben Zhong Tang*, Qingrui Fan* and Jianjun Wang*, 
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引用次数: 1

Abstract

Advances in the development of aggregation-induced emission luminogens (AIEgens) depend on understanding how the molecular packing affects their luminescent properties and on making nanoparticles (NPs) with desired sizes. Although reported strategies have advanced the field, rational control of molecular packing and efficient fabrication of AIEgen NPs sub-5.5 nm in diameter remain pressing issues. Here we report a “freeze assembly” strategy, in which the diameter of AIEgen NPs can be precisely tuned from ~3 nm to hundreds of nanometers, and a molecular packing in kinetically trapped states that are not easily captured by conventional assembly methods can be obtained, leading to tunable fluorescence emissions. Therefore, this study provides a significant tool to fabricate organic luminescent nanomaterials with diameters smaller than 5 nm, which is of critical importance for biomedical applications; meanwhile, tuning molecular packing in nanoparticles displaying different fluorescence may help to shed new light on the mechanism of AIEgens.

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通过冷冻组装制备具有可调分子包装的超小AIE纳米颗粒
聚集致发射发光物质(AIEgens)的发展取决于对分子堆积如何影响其发光性能的理解,以及如何制造出理想尺寸的纳米颗粒(NPs)。尽管已有的研究策略已经在该领域取得了进展,但合理控制分子包装和高效制备直径小于5.5 nm的AIEgen NPs仍然是亟待解决的问题。在这里,我们报告了一种“冷冻组装”策略,其中AIEgen NPs的直径可以精确地从3纳米调整到数百纳米,并且可以获得传统组装方法不易捕获的动态捕获状态的分子包装,从而导致可调谐的荧光发射。因此,本研究为制备直径小于5 nm的有机发光纳米材料提供了重要工具,对生物医学应用具有重要意义;同时,调整纳米颗粒的分子排列,显示不同的荧光,可能有助于揭示AIEgens的机制。
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来源期刊
Nano Letters
Nano Letters 工程技术-材料科学:综合
CiteScore
16.80
自引率
2.80%
发文量
1182
审稿时长
1.4 months
期刊介绍: Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.
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