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<p>Heavy metal Cu<sup>2+</sup> from industrial discharge continuously accumulates in ecosystems, posing threats to human health and ecological balance. Researchers successfully synthesized a novel fluorescent probe, <b>TPA-OPD</b>, via a Schiff base reaction between triphenylamine and o-phenylenediamine. <b>TPA-OPD</b> exhibits rapid, highly selective, and sensitive fluorescence quenching in response to Cu<sup>2+</sup>, along with excellent anti-interference capability. The binding mechanism between Cu²⁺ and <b>TPA-OPD</b> was confirmed by Job’s plot, Fourier-transform infrared spectroscopy, mass spectrometry, nuclear magnetic resonance, and Gaussian calculations. <b>TPA-OPD</b> effectively detects Cu<sup>2+</sup> in real-world environmental samples such as tap water and river water, demonstrating strong potential for monitoring Cu<sup>2+</sup> pollution.</p> Graphical Abstract <p></p>

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A Schiff Base-Functionalized Triphenylamine Fluorescent Probe for Selective and Sensitive Detection of Cu2+ in Aqueous Media

  • 期刊论文

  • 发表日期：

    2026年3月6日

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  • Long Liu,
  • Jiayi Chen,
  • Meijun Ye,
  • Wen Huang,
  • Xiang Liao,
  • Hanqing Wu,
  • Jingshui Xu

摘要

Heavy metal Cu2+ from industrial discharge continuously accumulates in ecosystems, posing threats to human health and ecological balance. Researchers successfully synthesized a novel fluorescent probe, TPA-OPD, via a Schiff base reaction between triphenylamine and o-phenylenediamine. TPA-OPD exhibits rapid, highly selective, and sensitive fluorescence quenching in response to Cu2+, along with excellent anti-interference capability. The binding mechanism between Cu²⁺ and TPA-OPD was confirmed by Job’s plot, Fourier-transform infrared spectroscopy, mass spectrometry, nuclear magnetic resonance, and Gaussian calculations. TPA-OPD effectively detects Cu2+ in real-world environmental samples such as tap water and river water, demonstrating strong potential for monitoring Cu2+ pollution.

Graphical Abstract