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TD-DFT Guided Advanced E-Eye Sensing Technique for On-site Quantification of Fe, Cr, F, and As in the Environmental, Biological, and Food Samples
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A new bis(rhodamine)-based fluorescent chemosensor for Fe3+.

Xiaopo Chen1, Huijie Hong, Rui Han

  • 1Phosphorus Chemical Engineering Research Center of Henan Province, Department of Chemistry, Zhengzhou University, Zhengzhou, China.

Journal of Fluorescence
|December 8, 2011
PubMed
Summary

A novel bis(rhodamine)-based fluorescent probe was developed for selective iron(III) detection. The probe shows a distinct color and fluorescence enhancement upon binding with Fe(3+), enabling sensitive iron ion sensing.

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Selective detection of metal ions is crucial in environmental and biological monitoring.
  • Rhodamine-based probes are widely used due to their favorable photophysical properties.

Purpose of the Study:

  • To synthesize and characterize a new bis(rhodamine)-based fluorescent probe.
  • To evaluate the probe's selectivity and sensitivity towards Fe(3+) ions.

Main Methods:

  • Synthesis of bis(rhodamine)-based probe 4.
  • Spectrophotometric and fluorometric measurements in 50% ethanol and Tris-HCl buffer.
  • Testing selectivity against common coexistent metal ions.

Main Results:

  • Probe 4 demonstrated high selectivity for Fe(3+) over other metal ions.
  • Fe(3+) binding induced spirocyclic ring opening of probe 4.
  • Significant enhancement in visible color and fluorescence (500-600 nm) was observed upon Fe(3+) addition.

Conclusions:

  • The synthesized bis(rhodamine) probe 4 is a selective and sensitive chemosensor for Fe(3+).
  • The probe's response mechanism involves the opening of its spirocyclic structure.
  • This probe holds potential for Fe(3+) detection in various sample matrices.