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<p>Developing a single platform capable of detecting chemically diverse pollutants in water remains challenging. Herein, we report a water-stable indium-organic framework, JLU-MOF234, constructed from 5-(3-carboxyphenyl)pyridine-2-carboxylic acid, which exhibits strong intrinsic fluorescence and excellent hydrolytic stability. Owing to its rigid coordination architecture and electron-rich conjugated ligand, JLU-MOF234 functions as a highly sensitive, multiresponsive fluorescent sensor capable of detecting Fe<sup>3+</sup> ions, dichromate anions (Cr<sub>2</sub>O<sub>7</sub><sup>2−</sup>), and nitroaromatic explosives in aqueous media. The framework demonstrates pronounced fluorescence quenching toward all three classes of pollutants, with high selectivity and low detection limits. This study highlights JLU-MOF234 as a versatile “all-in-one” luminescent platform for comprehensive environmental monitoring of chemically diverse contaminants.</p>

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An In-MOF Multiresponsive Fluorescent Sensor for Highly Sensitive Aqueous-phase Detection of Nitroaromatic Explosives, Fe3+ and Cr2O72−

  • 期刊论文

  • 发表日期：

    2026年4月2日

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  • Baobing Tang,
  • Xinyao Liu,
  • Sipeng Tian,
  • Zhiwei Liu,
  • Xueyue Yu,
  • Lirong Zhang

摘要

Developing a single platform capable of detecting chemically diverse pollutants in water remains challenging. Herein, we report a water-stable indium-organic framework, JLU-MOF234, constructed from 5-(3-carboxyphenyl)pyridine-2-carboxylic acid, which exhibits strong intrinsic fluorescence and excellent hydrolytic stability. Owing to its rigid coordination architecture and electron-rich conjugated ligand, JLU-MOF234 functions as a highly sensitive, multiresponsive fluorescent sensor capable of detecting Fe3+ ions, dichromate anions (Cr2O72−), and nitroaromatic explosives in aqueous media. The framework demonstrates pronounced fluorescence quenching toward all three classes of pollutants, with high selectivity and low detection limits. This study highlights JLU-MOF234 as a versatile “all-in-one” luminescent platform for comprehensive environmental monitoring of chemically diverse contaminants.