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Conformation-Resolved Single-Luminogen Systems for Time-Dependent Multicolor Afterglow.

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Area of Science:

  • Materials Science
  • Photochemistry
  • Organic Chemistry

Background:

  • Static luminescence lacks temporal encoding capabilities.
  • Controlling time-dependent multicolor afterglow is challenging.
  • Existing methods offer limited wavelength and color tunability.

Purpose of the Study:

  • To develop a molecular design for intrinsic dual-phosphorescence in single-luminogen systems.
  • To achieve dynamically color-tunable afterglow.
  • To integrate material functionalities with time-dependent multicolor afterglow.

Main Methods:

  • Integrating flexible C-S-C rotors into a rigid pyrene core.
  • Stabilizing distinct emissive conformers with different triplet energy levels.
  • Utilizing conformation-resolved molecular design.

Main Results:

  • Achieved intrinsic dual-phosphorescence (red and green) in a single molecule.
  • Demonstrated a visually perceptible color transition from red to yellow to green over time.
  • Exhibited resistance to water, acids/bases, and organic solvents.
  • Showcased intrinsic UV-shielding capabilities.

Conclusions:

  • Conformation-resolved molecular design unlocks intrinsic dual-phosphorescence.
  • Dynamically color-tunable afterglow is achievable in single-luminogen systems.
  • The developed materials offer robust functionalities for diverse applications.