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Three-coordinated Ce(III) complexes with long wavelength d-f emissions.

Ziyu Liu1, Yihu Yang1, Wenliang Huang2

  • 1Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, PR China.

Communications Chemistry
|December 22, 2025
PubMed
Summary

Researchers developed new cerium(III) complexes for tunable luminescence. These materials utilize f-d transitions, offering advantages over traditional f-f transitions for molecular luminescent materials.

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Photophysics

Background:

  • Lanthanide luminescent materials are widely used.
  • Current applications often rely on intrashell f-f transitions.
  • f-d transitions offer a novel approach for molecular luminescent materials.

Purpose of the Study:

  • To explore f-d transitions in lanthanide complexes.
  • To develop three-coordinated cerium(III) complexes with tunable emission.
  • To investigate the impact of ligand field engineering on luminescence.

Main Methods:

  • Synthesis of three-coordinated cerium(III) complexes.
  • Characterization using X-ray crystallography and 1H NMR spectroscopy.
  • Photophysical property investigation, including photoluminescent quantum yield and CIE values.

Main Results:

  • Successfully synthesized and characterized novel cerium(III) complexes.
  • Observed strong d-f emissions with high photoluminescent quantum yields (up to 62%).
  • Achieved specific CIE color coordinates (0.46, 0.51).

Conclusions:

  • Demonstrated the potential of f-d transitions for molecular luminescence.
  • Established a method for tuning emission wavelengths via ligand field engineering.
  • Opened new avenues for designing lanthanide luminescent molecules.