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Organic Afterglow Vesicles.

Siqi Zhu1, Biao Xu2, Ting Luo2

  • 1Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials, School of Materials Science and Engineering, Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 8, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed organic afterglow vesicles using polymerization-induced self-assembly (PISA). These vesicles offer long-lived luminescence for advanced applications like bioimaging and oxygen sensing.

Keywords:
difluoroboron β‐diketonateorganic afterglowpolymerization‐induced self‐assemblythermally activated delayed fluorescencevesicles

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Area of Science:

  • Materials Science
  • Organic Chemistry
  • Nanotechnology

Background:

  • Organic afterglow materials are promising for bioimaging, sensing, and encryption.
  • Creating nanostructures like vesicles with long-lived luminescence is challenging.

Purpose of the Study:

  • To construct organic afterglow vesicles using polymerization-induced self-assembly (PISA).
  • To integrate thermally activated delayed fluorescence (TADF) emitters into block copolymer nanostructures.
  • To explore their potential in bioimaging, sensing, and environmental monitoring.

Main Methods:

  • Polymerization-induced self-assembly (PISA) was used to create vesicles.
  • Thermally activated delayed fluorescence (TADF) organic afterglow emitters were incorporated.
  • Characterization of vesicle morphology, size, solid content, afterglow lifetime, and PLQY was performed.
  • Oxygen-responsive behavior was investigated.

Main Results:

  • Vesicles with well-defined hollow morphologies and uniform size were successfully synthesized.
  • High solid content up to 20% was achieved.
  • Significant room-temperature afterglow was observed with a lifetime exceeding 200 ms and a PLQY of 20.8%.
  • Efficient TADF mechanism with protected triplet states was identified.
  • Rapid, reversible, and repeatable oxygen-responsive behavior was demonstrated.

Conclusions:

  • PISA provides a versatile and scalable strategy for designing functional organic afterglow nanostructures.
  • The developed vesicles exhibit excellent afterglow properties and oxygen sensitivity.
  • These materials hold significant potential for applications in bioimaging, sensing, and environmental monitoring.