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<p>Orange light-emitting copper nanoparticles (DAMP-CuNPs@PVP) with a particle size of approximately 100&#xa0;nm were synthesized through the reaction of 4,6-diamino-2-mercaptopyrimidine (DAMP), with copper chloride in the presence of ascorbic acid (AA) and polyvinylpyrrolidone (PVP). The DAMP-CuNPs@PVP composite system exhibits excellent stability and dispersibility, remaining clear after 20&#xa0;days of storage at room temperature without any significant alteration in fluorescence. Within the temperature range of 0–60&#xa0;°C, the fluorescence properties of DAMP-CuNPs@PVP vary with temperature changes: as the temperature increases, the emission peak at 571&#xa0;nm weakens, while the emission peak at 471&#xa0;nm strengthens. A good linear relationship is observed between <i>l</i><sub>g</sub>(<i>I</i><sub>477</sub>/<i>I</i><sub>571</sub>) and T. Upon repeated heating and cooling cycles, the emission peak intensity ratio I<sub>477</sub>/I<sub>571</sub> of the system demonstrates reversible behavior in response to temperature changes. After 18 cycles, the system retains stable thermosensitive fluorescence characteristics. Additionally, the system responds to ethanol with a detection limit of 1.5%.</p> Graphical abstract <p>A new fluorescent probe, which can realize the dual detection of temperature and ethanol.</p>

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Dual detection probes for mercaptopyrimidine-modified copper-based nanomaterials: High-sensitivity detection of temperature and alcohols

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Yuting Hu,
  • Lanzhi Mei,
  • Yao Zeng,
  • Manbo Zhang,
  • Han Gong,
  • Ruixiang Hu

摘要

Orange light-emitting copper nanoparticles (DAMP-CuNPs@PVP) with a particle size of approximately 100 nm were synthesized through the reaction of 4,6-diamino-2-mercaptopyrimidine (DAMP), with copper chloride in the presence of ascorbic acid (AA) and polyvinylpyrrolidone (PVP). The DAMP-CuNPs@PVP composite system exhibits excellent stability and dispersibility, remaining clear after 20 days of storage at room temperature without any significant alteration in fluorescence. Within the temperature range of 0–60 °C, the fluorescence properties of DAMP-CuNPs@PVP vary with temperature changes: as the temperature increases, the emission peak at 571 nm weakens, while the emission peak at 471 nm strengthens. A good linear relationship is observed between lg(I477/I571) and T. Upon repeated heating and cooling cycles, the emission peak intensity ratio I477/I571 of the system demonstrates reversible behavior in response to temperature changes. After 18 cycles, the system retains stable thermosensitive fluorescence characteristics. Additionally, the system responds to ethanol with a detection limit of 1.5%.

Graphical abstract

A new fluorescent probe, which can realize the dual detection of temperature and ethanol.