Two Ln-MOFs Based on 4,4',4''-nitrilotrisbenzoic Acid as Multi-Response Luminescence Sensors With High Selectivity and Sensitivity Toward Fe³⁺ and Cr₂O₇ ².

IF 3.5 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Chemistry - An Asian Journal Pub Date : 2025-06-05 DOI:10.1002/asia.202500418

Jing Wang, Danyang Qi, Caiyun Shao, Qian Guo, Lirong Yang

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引用次数: 0

Abstract

Lanthanide metal-organic frameworks (Ln-MOFs) have been widely developed for sensing due to their inherent structural properties and unique lanthanide luminescence characteristics. Herein, a series of Ln-MOFs (Ln = Nd (1), Eu (2), Gd (3), Tb (4), Ho (5)) were successfully synthesized using the ligand 4,4',4''-nitrilotrisbenzoic acid (H₃NTB) under hydrothermal conditions. The fluorescence experiments demonstrate that compounds 2 and 4 can specifically recognize Fe³⁺ and Cr₂O₇ ^2- ions in aqueous solutions through significant fluorescence quenching, respectively. This process not only exhibits high selectivity for the target ions but also shows a low detection limit, excellent anti-interference capability, and relatively fast response time (less than 45 s). The distinct emission changes of 2/4 enable multifunctional, rapid, convenient, and visible detection by the naked eye under 365 nm UV light. Finally, the potential sensing mechanisms were elucidated based on experimental evaluation in detail.

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基于4,4′，4”-硝基三苯甲酸的两种多响应发光传感器对Fe3+和cr2o2o2具有高选择性和灵敏度。

镧系金属有机骨架（mn - mofs）由于其固有的结构特性和独特的镧系发光特性在传感领域得到了广泛的发展。本文以4,4′，4”-硝基三苯甲酸（H3NTB）为配体，在水热条件下成功合成了一系列Ln- mof (Ln = Nd (1), Eu (2), Gd (3), Tb （4), Ho(5)）。荧光实验表明，化合物2和4分别通过显著的荧光猝灭对水溶液中的Fe3+和Cr2O7 2-离子有特异性识别。该工艺不仅对目标离子具有高选择性，而且检测限低，抗干扰能力强，响应时间短（小于45 s）。2/4的明显发射变化，在365 nm紫外光下实现了多功能、快速、方便、肉眼可见的检测。最后，在实验评估的基础上，详细阐述了潜在的传感机制。

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

Chemistry - An Asian Journal 化学-化学综合

CiteScore

7.00

自引率

2.40%

发文量

535

审稿时长

1.3 months

期刊介绍： Chemistry—An Asian Journal is an international high-impact journal for chemistry in its broadest sense. The journal covers all aspects of chemistry from biochemistry through organic and inorganic chemistry to physical chemistry, including interdisciplinary topics. Chemistry—An Asian Journal publishes Full Papers, Communications, and Focus Reviews. A professional editorial team headed by Dr. Theresa Kueckmann and an Editorial Board (headed by Professor Susumu Kitagawa) ensure the highest quality of the peer-review process, the contents and the production of the journal. Chemistry—An Asian Journal is published on behalf of the Asian Chemical Editorial Society (ACES), an association of numerous Asian chemical societies, and supported by the Gesellschaft Deutscher Chemiker (GDCh, German Chemical Society), ChemPubSoc Europe, and the Federation of Asian Chemical Societies (FACS).