Pressure-Modulated Host–Guest Interactions Boost Effective Blue-Light Emission of MIL-140A Nanocrystals

IF 36.3 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-09-15 DOI:10.1007/s40820-025-01917-8

Ting Zhang, Jiaju Liang, Ruidong Qiao, Binhao Yang, Kaiyan Yuan, Yixuan Wang, Chuang Liu, Zhaodong Liu, Xinyi Yang, Bo Zou

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引用次数: 0

Abstract

Luminescent metal–organic frameworks (MOFs) have garnered significant attention due to their structural tunability and potential applications in solid-state lighting, bioimaging, sensing, anti-counterfeiting, and other fields. Nevertheless, due to the tendency of 1,4-benzenedicarboxylic acid (BDC) to rotate within the framework, MOFs composed of it exhibit significant non-radiative energy dissipation and thus impair the emissive properties. In this study, efficient luminescence of MIL-140A nanocrystals (NCs) with BDC rotors as ligands is achieved by pressure treatment strategy. Pressure treatment effectively modulates the pore structure of the framework, enhancing the interactions between the N, N-dimethylformamide guest molecules and the BDC ligands. The enhanced host–guest interaction contributes to the structural rigidity of the MOF, thereby suppressing the rotation-induced excited-state energy loss. As a result, the pressure-treated MIL-140A NCs displayed bright blue-light emission, with the photoluminescence quantum yield increasing from an initial 6.8% to 69.2%. This study developed an effective strategy to improve the luminescence performance of rotor ligand MOFs, offers a new avenue for the rational design and synthesis of MOFs with superior luminescent properties.

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压力调制主客体相互作用增强MIL-140A纳米晶体的有效蓝光发射

发光金属有机框架（mof）由于其结构的可调性和在固态照明、生物成像、传感、防伪等领域的潜在应用而受到广泛关注。然而，由于1,4-苯二甲酸（BDC）在骨架内的旋转倾向，其组成的mof表现出明显的非辐射能量耗散，从而影响了其发射性能。在本研究中，通过压力处理策略实现了以BDC转子为配体的MIL-140A纳米晶体（NCs）的高效发光。压力处理可有效调节骨架的孔隙结构，增强N， N-二甲基甲酰胺客体分子与BDC配体之间的相互作用。增强的主客体相互作用有助于提高MOF的结构刚度，从而抑制旋转引起的激发态能量损失。结果表明，经过压力处理的MIL-140A纳米材料显示出明亮的蓝光发射，光致发光量子产率从最初的6.8%提高到69.2%。本研究为提高转子配体mof的发光性能提供了有效的策略，为合理设计和合成具有优异发光性能的mof提供了新的途径。

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

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.