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Rhodamine B derivative-functionalized upconversion nanoparticles for FRET-based Fe(3+)-sensing.

Yujie Ding1, Hao Zhu, Xiaoxia Zhang

  • 1State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.

Chemical Communications (Cambridge, England)
|July 26, 2013
PubMed
Summary

A new probe using upconversion nanoparticles and a rhodamine B derivative detects Fe(3+) ions in water. This fluorescence resonance energy transfer (FRET)-based sensor offers high sensitivity and selectivity for iron(III) detection.

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Area of Science:

  • Nanomaterials Science
  • Analytical Chemistry
  • Biomedical Sensing

Background:

  • Iron(III) (Fe3+) is crucial in biological systems but elevated levels indicate disease.
  • Accurate Fe3+ detection is vital for diagnostics and environmental monitoring.
  • Existing detection methods often lack sensitivity, selectivity, or require complex procedures.

Purpose of the Study:

  • To develop a novel, highly sensitive, and selective probe for Fe3+ detection.
  • To utilize fluorescence resonance energy transfer (FRET) between upconversion nanoparticles and a dye for sensing.
  • To demonstrate the probe's efficacy in aqueous solutions.

Main Methods:

  • Synthesized NaYF4:Yb, Ho upconversion nanoparticles (UCNPs).
  • Functionalized UCNPs with γ-cyclodextrin, oleic acid, and a rhodamine B derivative (RBD).
  • Investigated the FRET mechanism and Fe3+ sensing performance in aqueous media.

Main Results:

  • The developed probe exhibited strong fluorescence response to Fe3+ ions.
  • Achieved high sensitivity and selectivity for Fe3+ detection, with a low limit of detection.
  • Demonstrated successful Fe3+ sensing in aqueous solutions, indicating practical applicability.

Conclusions:

  • The novel UCNP-based FRET probe is effective for sensitive and selective Fe3+ sensing.
  • This approach offers a promising platform for developing advanced analytical tools for iron detection.
  • The probe has potential applications in environmental monitoring and biomedical diagnostics.