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<p>Tetracycline (TC) residues in animal-derived food pose a significant threat to human health, necessitating the development of straightforward and user-friendly methods for TC detection to safeguard food safety. Here, a series of novel Eu-based metal-organic frameworks (Eu-MOFs) were prepared using a dual-ligand strategy. In the midst of these Eu-MOFs, Eu-ABPDC<sub>0.6</sub>/BPDC<sub>0.4</sub> exhibits the dual emission at 472 and 619 nm under single-wavelength excitation, enabling highly effective ratiometric fluorescence sensing of TC. Notably, the sensor presents favorable performance characteristics, including rapid response (90 s), high specificity, broad linear range (0.1–200 μM), and low detection limit (0.081 μM). Furthermore, based on the attractive performance of Eu-ABPDC<sub>0.6</sub>/BPDC<sub>0.4</sub>, it was further combined with carrageenan to prepare a hydrogel assay kit for onsite, smartphone-assisted visualization and quantitative detection of TC.</p> Graphical Abstract <p></p>

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A novel dual-ligand luminescent Eu-based metal-organic framework for ratiometric fluorescence sensing and visual detection of tetracycline

  • 期刊论文

  • 发表日期：

    2025年9月4日

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  • Qi Cao,
  • Songrui Li,
  • Jiutong Ma,
  • Qiong Jia

摘要

Tetracycline (TC) residues in animal-derived food pose a significant threat to human health, necessitating the development of straightforward and user-friendly methods for TC detection to safeguard food safety. Here, a series of novel Eu-based metal-organic frameworks (Eu-MOFs) were prepared using a dual-ligand strategy. In the midst of these Eu-MOFs, Eu-ABPDC0.6/BPDC0.4 exhibits the dual emission at 472 and 619 nm under single-wavelength excitation, enabling highly effective ratiometric fluorescence sensing of TC. Notably, the sensor presents favorable performance characteristics, including rapid response (90 s), high specificity, broad linear range (0.1–200 μM), and low detection limit (0.081 μM). Furthermore, based on the attractive performance of Eu-ABPDC0.6/BPDC0.4, it was further combined with carrageenan to prepare a hydrogel assay kit for onsite, smartphone-assisted visualization and quantitative detection of TC.

Graphical Abstract