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Boronic ester-functionalized dual-state emitter for oxygen/strain sensing and dynamic encryption.

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Summary

A new luminogen, BTDA-BA, exhibits both long-lived room temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF). This dual-state material shows promise for oxygen and strain detection, flexible displays, and information encryption.

Keywords:
Host-guest dopingOxygen-detectionRoom temperature phosphorescenceStrain detectionThermally activated delayed fluorescence

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Area of Science:

  • Materials Science
  • Photochemistry
  • Organic Electronics

Background:

  • Developing novel luminogens with dual emission properties is crucial for advanced optical applications.
  • Simultaneous room temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) offer unique photophysical characteristics.

Purpose of the Study:

  • To design and synthesize a novel luminogen, BTDA-BA, exhibiting both RTP and TADF emissions.
  • To investigate the performance of BTDA-BA in various matrices for sensing and display applications.
  • To explore the potential of BTDA-BA in developing multifunctional long afterglow materials.

Main Methods:

  • Synthesis of the novel luminogen BTDA-BA.
  • Incorporation of BTDA-BA into different matrices (DMSO, PMMA, PVA, PVC, SIS).
  • Characterization of photophysical properties, including RTP and TADF lifetimes, emission spectra, and oxygen/strain sensing capabilities.
  • Utilizing Förster resonance energy transfer (FRET) for ternary doping systems.

Main Results:

  • BTDA-BA demonstrated simultaneous long-lived RTP and TADF emissions in various matrices.
  • Exceptional RTP and TADF lifetimes (up to 1307.28 ms and 566.55 ms, respectively) were observed in BTDA-BA@PVA films.
  • BTDA-BA@PVC films showed excellent oxygen detection sensitivity, reversibility, and a wide detection range (0-2.1 × 10^5 ppm).
  • The material also exhibited promising strain-detection properties and achieved long-lived orange afterglow via FRET.

Conclusions:

  • BTDA-BA is a novel dual-state long afterglow material with persistent luminescence in both rigid and flexible matrices.
  • The material enables efficient oxygen and strain detection, paving the way for flexible displays, 3D modeling, and information encryption.
  • This work advances the practical and theoretical understanding of multifunctional long afterglow materials.