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Phosphorescent supramolecular systems for medicine anticounterfeiting.

Wen-Ting Wu1, Chun-Yun Deng1, Zhi-Yuan Zhang2

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Researchers developed edible phosphorescent supramolecules (VB10@α/β-CDs) for medicine anticounterfeiting. These materials offer a safe and robust solution with long phosphorescence lifetimes and high quantum yields.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Reliable anticounterfeiting solutions for medicines are crucial.
  • Developing safe and robust materials for this purpose presents significant challenges.
  • Existing methods may lack the necessary safety or stability for pharmaceutical applications.

Purpose of the Study:

  • To create edible phosphorescent supramolecules for effective medicine anticounterfeiting.
  • To investigate the mechanism behind enhanced phosphorescence in these novel materials.
  • To assess the suitability of these supramolecules as phosphorescent inks.

Main Methods:

  • Preparation of supramolecular complexes (VB10@α/β-CDs) using vitamin B10 (VB10) and cyclodextrins (α/β-CDs).
  • Synthesis via simple grinding with water or co-crystallization from aqueous solution.
  • Characterization of photophysical properties, including phosphorescence lifetime and quantum yield.

Main Results:

  • The synthesized VB10@α/β-CDs exhibit long phosphorescence lifetimes (up to 1.16 s) and high quantum yields (up to 86.5%).
  • Encapsulation by α/β-CDs alters VB10's excited state energy ordering, promoting minimum energy crossing (MECP) and boosting phosphorescence.
  • The supramolecules demonstrate edible nature, moisture robustness, room-temperature phosphorescence, and circularly polarized luminescence.

Conclusions:

  • Edible phosphorescent supramolecules (VB10@α/β-CDs) offer a promising solution for medicine anticounterfeiting.
  • The elucidated MECP-involved mechanism provides insights into phosphorescence enhancement strategies.
  • These materials are attractive for developing secure and safe anti-counterfeiting technologies in the pharmaceutical industry.