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Two-Color Three-State Luminescent Lanthanide Core-Shell Crystals.

Cristina M Balogh1,2, Laurent Veyre2, Guillaume Pilet3

  • 1Univ. Lyon, Ens Lyon, CNRS, Université Claude Bernard Lyon 1, UMR 5182, Laboratoire de Chimie, F69342, Lyon, France.

Chemistry (Weinheim an Der Bergstrasse, Germany)
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Summary

Researchers developed novel luminescent core-shell crystals using lanthanide complexes. These crystals allow for selective or simultaneous light emission by adjusting the excitation wavelength, offering tunable optical properties.

Keywords:
composite crystalscore-shell crystalslanthanidesluminescence

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Area of Science:

  • Materials Science
  • Photochemistry
  • Coordination Chemistry

Background:

  • Lanthanide complexes offer unique luminescent properties.
  • Core-shell structures provide enhanced functionality and control.
  • Dipicolinate ligands are known for their ability to sensitize lanthanide luminescence.

Purpose of the Study:

  • To synthesize novel luminescent core-shell crystals.
  • To investigate the tunable emission properties of these crystals.
  • To explore selective and simultaneous emission based on excitation.

Main Methods:

  • Successive layer-by-layer growth of lanthanide tris-dipicolinate complexes.
  • Characterization of the core-shell crystal structure.
  • Photoluminescence spectroscopy to analyze emission properties.

Main Results:

  • Successfully synthesized core-shell crystals with distinct lanthanide complex layers.
  • Demonstrated selective emission from either the core or shell layer by controlling excitation wavelength.
  • Achieved simultaneous emission from both layers under specific excitation conditions.

Conclusions:

  • The developed core-shell crystals exhibit tunable luminescence.
  • Precise control over excitation wavelength enables selective or simultaneous light emission.
  • These materials hold potential for applications in optical devices and sensing.