Novel terbium-based metal–organic framework for ratiometric sensing quinolone antibiotic in water

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-03-18 DOI:10.1016/j.poly.2025.117508

Xuliang Zhang , Miaoyuan Zhang , Qi Lu , Wanru Qi , Yongrui Zhang , Xinli Lv , Shuang Ma , Yutian Yan , Zhengnan Lin , Xiangqian Li

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Abstract

In the present work, we report a novel terbium-based metal organic framework, named {[Tb(Hddpd)(H₂O)₃]·2H₂O]}_n (Hddpd = 2,5-di(2′,4′-dicarboxylphenyl)-1,4-difluorobenzene). Single crystal X-ray diffraction (SC-XRD) has shown that the MOF has a two-dimensional structure. In addition, after a series of stability analyses, we found that the synthesized Tb-MOF also has excellent thermal, acid-base, and water stability. Interestingly, the Tb-MOF exhibits dual emission from both the ligand and metal centers, making it a natural ratiometric probe. It effectively detects ciprofloxacin (CIP) and norfloxacin (NOR) in water, with detection limits of 1.03 µmol/L for CIP and 1.35 µmol/L for NOR, and maintains excellent reusability over five cycles. The sensing mechanism, involving internal filtering effect (IFE) and photoinduced electron transfer (PET), highlights its potential as a highly efficient fluorescent sensor for antibiotic detection in aqueous environments.

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新型铽基金属-有机框架用于水中喹诺酮类抗生素的比例传感

在本工作中，我们报道了一种新的铽基金属有机骨架，命名为{[Tb(Hddpd)(H2O)3]·2H2O]}n （Hddpd = 2,5-二（2 ',4 ' -二羧基苯基）-1,4-二氟苯）。单晶x射线衍射（SC-XRD）表明MOF具有二维结构。此外，经过一系列的稳定性分析，我们发现合成的Tb-MOF还具有优异的热稳定性、酸碱稳定性和水稳定性。有趣的是，Tb-MOF表现出配体和金属中心的双重发射，使其成为天然的比率探针。该方法可有效检测水中的环丙沙星（CIP）和诺氟沙星（NOR）， CIP和NOR的检出限分别为1.03µmol/L和1.35µmol/L，并在5个循环中保持良好的重复使用性能。该传感机制涉及内过滤效应（IFE）和光诱导电子转移（PET），突出了其作为水环境中抗生素检测的高效荧光传感器的潜力。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.