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Photoluminescence: Applications01:14

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Related Experiment Video

Updated: May 31, 2026

Quantifying the Binding Interactions Between Cu(II) and Peptide Residues in the Presence and Absence of Chromophores
11:38

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Published on: April 5, 2022

Phosphorescent sensor for robust quantification of copper(II) ion.

Youngmin You1, Yejee Han, Yong-Min Lee

  • 1Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA. odds2@mit.edu

Journal of the American Chemical Society
|July 14, 2011
PubMed
Summary

A novel iridium(III) complex functions as a reversible phosphorescent sensor for detecting copper(II) ions. This sensor accurately quantifies copper(II) in water and detects it within cells using ratiometric measurements.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Developing selective and sensitive sensors for metal ions is crucial for environmental monitoring and biological studies.
  • Iridium(III) complexes are promising phosphorescent materials due to their tunable photophysical properties.

Purpose of the Study:

  • To synthesize and characterize a multichromophoric iridium(III) complex for detecting copper(II) ions.
  • To evaluate the sensor's performance in aqueous media and intracellular environments.

Main Methods:

  • Synthesis and characterization of a novel multichromophoric iridium(III) complex.
  • Investigating the phosphorescence response (intensity ratio and lifetime) to copper(II) ions.
  • Assessing sensor reversibility, selectivity, and ratiometric detection capabilities.

Main Results:

  • The synthesized iridium(III) complex demonstrated a phosphorescent response to copper(II) ions.
  • Concomitant changes in phosphorescence intensity ratio and lifetime were observed upon copper(II) binding.
  • The sensor showed reversibility and selectivity for copper(II) detection in aqueous solutions.

Conclusions:

  • A novel phosphorescent iridium(III) complex serves as an effective sensor for copper(II) ions.
  • The sensor enables ratiometric quantification of copper(II) in aqueous media and intracellular detection.
  • This work offers a new tool for sensitive and selective copper(II) ion analysis.