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<p>The widespread use of acetamiprid (ACE) poses increasing threats to food safety and human health due to its environmental persistence and potential toxicity. Herein, a fluorescent europium-based metal–organic framework (Eu-MOF) was synthesized via a facile room-temperature direct mixing strategy, which serves as a rapid and selective fluorescent probe for ACE detection. The dual-ligand Eu-MOF exhibited intrinsic multi-emission properties, with a dominant red fluorescence at 616&#xa0;nm that is selectively quenched upon ACE exposure. Under optimized conditions, the sensor showed two linear response ranges (0.01–6 and 6–20&#xa0;µg/mL) with a detection limit as low as 3.03&#xa0;ng/mL. Mechanistic investigations reveal that the quenching is primarily governed by the inner filter effect (IFE), supported by spectral overlap and unaltered fluorescence lifetime. The probe demonstrates high specificity against common interfering substances and enables accurate quantification of ACE in complex matrices such as apples and oranges, with satisfactory recovery rates (94.35–100.6%) and low relative standard deviations (≤ 1.96%). This work provides a promising platform for rapid, low-cost, and highly sensitive monitoring of pesticide residues in food safety surveillance.</p>

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Dual-Ligand Europium Metal–Organic Framework for Highly Sensitive Fluorescence Detection of Acetamiprid in Fruits

  • 期刊论文

  • 发表日期：

    2026年4月25日

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  • Mingmeng Xie,
  • Xiaodong Sun,
  • Zijun Wen,
  • Xinhui Jiang,
  • Qiu Mao,
  • Siqiao Li,
  • Wei Wang,
  • Zhengwei Zhang

摘要

The widespread use of acetamiprid (ACE) poses increasing threats to food safety and human health due to its environmental persistence and potential toxicity. Herein, a fluorescent europium-based metal–organic framework (Eu-MOF) was synthesized via a facile room-temperature direct mixing strategy, which serves as a rapid and selective fluorescent probe for ACE detection. The dual-ligand Eu-MOF exhibited intrinsic multi-emission properties, with a dominant red fluorescence at 616 nm that is selectively quenched upon ACE exposure. Under optimized conditions, the sensor showed two linear response ranges (0.01–6 and 6–20 µg/mL) with a detection limit as low as 3.03 ng/mL. Mechanistic investigations reveal that the quenching is primarily governed by the inner filter effect (IFE), supported by spectral overlap and unaltered fluorescence lifetime. The probe demonstrates high specificity against common interfering substances and enables accurate quantification of ACE in complex matrices such as apples and oranges, with satisfactory recovery rates (94.35–100.6%) and low relative standard deviations (≤ 1.96%). This work provides a promising platform for rapid, low-cost, and highly sensitive monitoring of pesticide residues in food safety surveillance.