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Vessels based on cyclodextrin polymers promote aggregation induced emission.

Estefanía Delgado-Pinar1, Gianluca Utzeri2, Artur J M Valente2

  • 1Molecular Science Institute, Inorganic Chemistry Department, University of Valencia, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain; CQC-IMS, Department of Chemistry, University of Coimbra, Coimbra P-3004-535, Portugal.

Carbohydrate Polymers
|March 6, 2025
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Summary
This summary is machine-generated.

Cyclodextrin-based polymers enhance solid-state fluorescence for tetraphenylethene (TPE) and tetraphenyl-1,3-cyclopentadiene (TPC). This overcomes aggregation-caused quenching, enabling applications in materials science and beyond.

Keywords:
AIE luminogensHost-guest interactionsNanospongesPolycyclodextrins

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Photophysics

Background:

  • Aggregation-caused quenching (ACQ) limits the solid-state fluorescence of many organic luminogens.
  • Tetraphenylethene (TPE) and 1,2,3,4-tetraphenyl-1,3-cyclopentadiene (TPC) are known luminogens susceptible to ACQ.

Purpose of the Study:

  • To develop a strategy for enhancing the solid-state fluorescence of TPE and TPC using cyclodextrin-based polymers.
  • To investigate the influence of polymer confinement on luminogen photophysical properties.

Main Methods:

  • Synthesis of cyclodextrin-based polymers.
  • Incorporation of TPE and TPC into the polymer matrix via controlled solvent transport.
  • Variation of polymer cross-linking ratios.
  • Morphological and photophysical characterization (e.g., fluorescence quantum yield measurements).

Main Results:

  • Achieved high fluorescence quantum yields for TPE (60%) and TPC (81%) in the solid state.
  • Demonstrated effective suppression of aggregation-caused quenching through polymer confinement.
  • Showcased control over material morphology and photophysical properties by adjusting solvent and cross-linking ratio.

Conclusions:

  • Cyclodextrin-based polymers effectively enhance the solid-state fluorescence of luminogens like TPE and TPC.
  • The developed strategy offers a method to create highly luminescent materials without external stimuli.
  • These materials have potential applications in areas requiring robust solid-state luminescence, such as advanced materials and sensors.