MB-encapsulated MOF-based composites as self-calibrating sensors for selective detection of tetracycline and nitroanilines

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-07-07 DOI:10.1016/j.poly.2025.117672

Zhijian Xie , Xue Wei , Tong Zeng , Jialin Li , Qian Ren , Yihui Wang , Jiayi Liu , Fengqin Wang

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Abstract

It is well known that the introduction of dye molecules into metal-organic frameworks (MOFs) can produce self-calibrating fluorescent sensors. In this work, we successfully constructed two dual-emission composites, MB@ZnMOF1 and MB@ZnMOF2. These composites are based on ZnMOFs synthesized using the organic ligands 5-((4-carboxyphenyl)formylamino)thiophene-2-carboxylicacid (L₁) and 2,5-bis-(3,4-dicarboxyphenyl)thiopheneamide (L₂), respectively, with the luminescent dye methylene blue (MB) encapsulated within their pores. Inspired by the dual-emission properties of these MB@ZnMOFs, we investigated their potential as fluorescent sensors for antibiotic compounds and aromatic amines. The results demonstrate that MB@ZnMOFs function effectively as multi-target sensors for selective detection of tetracycline and nitroanilines, with good anti-interference capability and cyclic stability. In addition, the dual-emission peaks of the MB@ZnMOFs both exhibit pronounced fluorescence changes upon interaction with analytes, enabling them to serve as self-calibrated fluorescent probes to detect tetracycline and nitroanilines. The possible quenching mechanism can be attributed to a competitive absorption between the MB@ZnMOFs and the analytes.

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mb封装mof基复合材料作为选择性检测四环素和硝基苯胺的自校准传感器

众所周知，将染料分子引入金属有机框架（MOFs）中可以产生自校准荧光传感器。在这项工作中，我们成功地构建了两种双发射复合材料MB@ZnMOF1和MB@ZnMOF2。这些复合材料分别以有机配体5-（（4-羧基苯基）甲酰基氨基）噻吩-2-羧酸（L1）和2,5-二-（3,4-二羧基苯基）噻吩酰胺（L2）合成的ZnMOFs为基础，其孔内包裹有发光染料亚甲基蓝（MB）。受这些MB@ZnMOFs的双发射特性的启发，我们研究了它们作为抗生素化合物和芳香胺的荧光传感器的潜力。结果表明，MB@ZnMOFs具有良好的抗干扰能力和循环稳定性，可作为选择性检测四环素和硝基苯胺的多靶点传感器。此外，MB@ZnMOFs的双发射峰在与分析物相互作用时都表现出明显的荧光变化，使其能够作为自校准荧光探针检测四环素和硝基苯胺。可能的猝灭机制可归因于MB@ZnMOFs和分析物之间的竞争性吸收。

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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.