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Related Experiment Video

Updated: Jan 2, 2026

Accumulation and Analysis of Cuprous Ions in a Copper Sulfate Plating Solution
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Highly Selective and Sensitive Colorimetric and Fluorimetric Sensor for Cu2.

Appadurai Deepa1, Venkatesan Srinivasadesikan2, Shyi-Long Lee3

  • 1Department of Organic Chemistry, School of Chemistry, Madurai Kamaraj University, 625021, Madurai, Tamilnadu, India.

Journal of Fluorescence
|December 7, 2019
PubMed
Summary

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A new fluorescent probe (6GS2) selectively detects copper ions (Cu2+) in water. Its unique rhodamine structure changes, enhancing fluorescence upon copper binding for accurate sensing.

Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Spectroscopy

Background:

  • Development of selective and sensitive probes for metal ion detection is crucial in environmental and biological monitoring.
  • Rhodamine-based dyes offer versatile platforms for designing chemosensors due to their tunable photophysical properties.

Discussion:

  • The synthesized probe (6GS2) displays distinct fluorescence enhancement upon binding with copper ions (Cu2+).
  • This sensing mechanism relies on a structural transformation from a spirocyclic to a non-cyclic form of the rhodamine dye.
  • The probe exhibits characteristic absorption peaks and emission spectra, with increased peak intensity observed during copper ion addition, attributed to n-π transitions.

Key Insights:

  • Selective detection of Cu2+ achieved in aqueous media using a novel fluorescent and colorimetric probe.
Keywords:
CopperFluorimetricRhodamine dyeSensor

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  • The probe's fluorescence is modulated by a structural change in the rhodamine core upon Cu2+ coordination.
  • Characterization confirms the probe's integrity and sensing capabilities through various spectroscopic and analytical techniques.

    • Outlook:

    • Further investigation into the probe's performance in complex biological or environmental samples.
    • Potential applications in developing portable sensing devices for real-time copper ion monitoring.
    • Exploration of similar structural motifs for detecting other environmentally relevant metal ions.