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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optoelectronics

Background:

  • Developing smart materials for information encryption is crucial.
  • Controlling time-dependent phosphorescent color (TDPC) in response to stimuli presents challenges.

Purpose of the Study:

  • To create smart phosphorescent polymer composites with stimuli-responsive, switchable TDPC.
  • To explore their potential for multi-dimensional information encryption.

Main Methods:

  • Immobilizing dual-emission centers with distinct stimuli sensitivities within a soft-rigid hybrid matrix.
  • Investigating multi-stimuli (light, humidity, heat) induced phosphorescence switching.
  • Analyzing excitation-dependence and reversible switching mechanisms.

Main Results:

  • Composites exhibit switchable phosphorescence between static and dynamic TDPC.
  • Photoactivation leads to dynamic multicolor TDPC via selective emission center activation and distinct decay rates.
  • Reversible switching achieved through water and thermal stimuli, demonstrating recyclability and self-healing.

Conclusions:

  • The developed phosphorescent polymer composites show potential for multi-dimensional information encryption.
  • This work offers a new perspective for upgrading security technologies using smart materials.