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MAPbBr3 Quantum Dots Encapsulated Within Lanthanide-MOFs for Time-Resolved Multicolor Dynamic Anticounterfeiting.

Jiachen Wang1, Zhenhua Gao2, Yajun Jia1

  • 1College of Chemistry, Beijing Normal University, Beijing, 100875, China.

Advanced Materials (Deerfield Beach, Fla.)
|March 10, 2025
PubMed
Summary
This summary is machine-generated.

Novel dynamic optical materials using quantum dots in metal-organic frameworks offer advanced anticounterfeiting solutions. These materials provide unpredictable, time-resolved multicolor changes for secure information encryption.

Keywords:
dynamic anticounterfeitinghost‐guest materialslanthanide‐MOFsperovskite quantum dotsquantum‐confinement effect

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Optics

Background:

  • Multicolor dynamic optical materials are crucial for anticounterfeiting and information encryption.
  • Their ability to generate unpredictable, time-varying optical information is key.

Purpose of the Study:

  • To develop a novel approach for time-resolved multicolor dynamic anticounterfeiting applications.
  • To utilize the quantum-confinement effect of perovskite quantum dots (QDs) embedded within lanthanide-metal organic frameworks (Ln-MOFs).

Main Methods:

  • In situ growth of MAPbBr3 quantum dots (QDs) within Ln-MOFs.
  • Exploiting the quantum-confinement effect for dynamic color changes.
  • Modulating emission colors by varying UV excitation wavelengths.

Main Results:

  • Temporal variations in QD dimensions led to dynamic luminescent color alterations.
  • Emission colors were tunable by changing UV excitation wavelengths, adding spatial distinguishability.
  • The system demonstrated time-resolved unpredictability, sustained luminescence, and multi-dimensional anticounterfeiting properties.

Conclusions:

  • The developed MAPbBr3@Eu-MOFs are suitable for advanced graphical coding and intelligent anticounterfeiting.
  • This approach advances the field of dynamic optical anticounterfeiting materials.
  • The findings highlight the potential for novel security features based on dynamic material properties.