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<p>The detection of Fe<sup>3+</sup> by benzydamine hydrochloride (BNZ) and its mechanism were studied by UV, fluorescence, infrared, and <sup>1</sup>H NMR spectroscopy. The results showed that BNZ could be used as a fluorescence probe to selectively identify Fe<sup>3+</sup>. Recognition results from coordination of Fe<sup>3+</sup> by BNZ that leads to fluorescence quenching by electron transfer. A 1:1 complex is formed between BNZ and Fe<sup>3+</sup> with a binding constant of 3.619 × 10<sup>4</sup> M<sup>− 1</sup>. The fluorescence intensity of BNZ was linearly correlated with the concentration of Fe<sup>3+</sup> from 3.0 × 10<sup>− 6</sup> to 2.3 × 10<sup>− 4</sup> M, the detection limit was as low as 1.24 × 10<sup>− 7</sup> M, and the recovery rate of Fe<sup>3+</sup> detected in tap water was 96–98%, which could enable quantitative detection and monitoring of Fe<sup>3+</sup> in environmental systems, and the method is simple, accurate, low detection limit, and can detect Fe<sup>3+</sup> quickly, selectively, and sensitively.</p>

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A Fluorescent Probe Based on the Anti-Inflammatory Drug Benzydamine Hydrochloride for the Detection of Fe3+ Ions

  • 期刊论文

  • 发表日期：

    2025年3月31日

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  • Huiqin Wu,
  • Zhimei Wang,
  • Bo Li,
  • Qing Chen

摘要

The detection of Fe3+ by benzydamine hydrochloride (BNZ) and its mechanism were studied by UV, fluorescence, infrared, and 1H NMR spectroscopy. The results showed that BNZ could be used as a fluorescence probe to selectively identify Fe3+. Recognition results from coordination of Fe3+ by BNZ that leads to fluorescence quenching by electron transfer. A 1:1 complex is formed between BNZ and Fe3+ with a binding constant of 3.619 × 104 M− 1. The fluorescence intensity of BNZ was linearly correlated with the concentration of Fe3+ from 3.0 × 10− 6 to 2.3 × 10− 4 M, the detection limit was as low as 1.24 × 10− 7 M, and the recovery rate of Fe3+ detected in tap water was 96–98%, which could enable quantitative detection and monitoring of Fe3+ in environmental systems, and the method is simple, accurate, low detection limit, and can detect Fe3+ quickly, selectively, and sensitively.