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Doping Gd16 nanoclusters for expanded optical properties and thermometry applications.

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Lanthanide metal clusters, specifically Gd16, show promise as optical materials. Doping with terbium (Tb3+) and europium (Eu3+) ions enables tunable luminescence and potential applications in sensing.

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Area of Science:

  • Materials Science
  • Inorganic Chemistry
  • Photophysics

Background:

  • Lanthanide metal clusters offer unique architectures and properties.
  • Their potential as efficient optical materials is underexplored.
  • Gd16 clusters provide a versatile platform for doping due to their coordination environment.

Purpose of the Study:

  • To explore the luminescent properties of Gd16 clusters doped with lanthanide ions.
  • To achieve tunable luminescence colors by co-doping Tb3+ and Eu3+ ions.
  • To investigate the energy transfer mechanisms and potential applications as luminescent thermometers.

Main Methods:

  • Synthesis and characterization of Gd16 clusters.
  • Doping Gd16 clusters with Tb3+ and Eu3+ ions.
  • Photoluminescence (PL) spectroscopy, including time-resolved measurements.
  • Temperature-dependent PL studies.

Main Results:

  • Achieved green emission with Tb3+ doping and red emission with Eu3+ doping in Gd16 clusters.
  • Demonstrated red-orange-yellow color-tunable luminescence by controlling Tb3+/Eu3+ ratios.
  • Confirmed efficient photosensitization and energy transfer from ligands to dopant ions.
  • Investigated temperature-dependent luminescence for thermometry applications.

Conclusions:

  • Gd16 clusters serve as effective hosts for Tb3+ and Eu3+ luminescence.
  • Co-doping enables precise control over emission color, opening avenues for optical applications.
  • The demonstrated energy transfer mechanisms and temperature-dependent properties highlight their potential as luminescent thermometers.