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Related Experiment Video

Updated: Sep 30, 2025

Accumulation and Analysis of Cuprous Ions in a Copper Sulfate Plating Solution
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Fluorescent probe visualization for selective detection of cuprous ion.

Ranhao Yin1, Long Yu2, Pengchen Su2

  • 1Guangdong Provincial Key Laboratory of Petrochemical Pollution Process and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, 525000, Guangdong, China.

Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry
|March 14, 2022
PubMed
Summary

Researchers developed a new fluorescent probe to detect unstable copper(I) ions, crucial for understanding biological processes. This probe enables rapid, selective, and quantitative monitoring of copper(I) in various environments.

Keywords:
Cuprous ionFastProbeSensitiveVisualization

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Chemical Biology

Background:

  • Copper(I) ions are vital for human life but can cause systemic dysfunction when in excess.
  • Understanding the biological roles and levels of copper(I) is essential for human health.
  • Existing methods for detecting copper(I) may lack the sensitivity or selectivity required for biological applications.

Purpose of the Study:

  • To develop a novel fluorescent probe for the sensitive and selective detection of unstable copper(I) ions (Cu(I)).
  • To investigate the mechanism of detection, including photoelectron transfer (PET) effects.
  • To establish the probe's utility for both visual and quantitative analysis of Cu(I) in inorganic environments.

Main Methods:

  • Design and synthesis of a fluorescent probe incorporating a sulfur element for Cu(I) complexation.
  • Investigation of the probe's response to Cu(I) via fluorescence spectroscopy.
  • Evaluation of the probe's selectivity, sensitivity, and linear response for Cu(I) detection.
  • Determination of detection limits for both visual and quantitative measurements.

Main Results:

  • The fluorescent probe exhibits fluorescence quenching upon complexation with Cu(I) due to a photoelectron transfer (PET) effect.
  • Rapid and selective visual detection of Cu(I) was achieved in an inorganic environment.
  • A strong linear correlation (R² = 0.992) was observed between probe fluorescence intensity and Cu(I) concentration, enabling quantitative detection.
  • The probe demonstrated a low detection limit of 15 nM for quantitative analysis and 0.1 μM for visual detection.

Conclusions:

  • The developed fluorescent probe offers a valuable tool for real-time monitoring of Cu(I) concentrations.
  • The probe's mechanism, based on PET, allows for sensitive and selective detection.
  • This work lays the foundation for future applications in monitoring Cu(I) in biological systems, particularly in anaerobic human environments.