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A Schiff Base-Functionalized Triphenylamine Fluorescent Probe for Selective and Sensitive Detection of Cu2+ in
Long Liu1, Jiayi Chen1, Meijun Ye1
1Guangdong Provincial Key Laboratory of Petrochemical Equipment Fault Diagnosis, School of School of Materials Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China.
Abstract:
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.
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