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Photoluminescence: Applications

Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Ion-Driving Polymer Entanglement for Dynamic Organic Phosphorescence.

Wenpeng Ye1, Yusheng Li1, Shiqin Jing1

  • 1State Key Laboratory of Flexible Electronics (LoFE), Institute of Advanced Materials (IAM), School of Chemistry and Life Sciences, Nanjing University of Posts and Telecommunications, Nanjing, China.

Angewandte Chemie (International Ed. in English)
|June 30, 2026
PubMed
Summary
This summary is machine-generated.

Ion-driven polymer entanglement offers precise control over organic phosphorescent materials. This breakthrough enables tunable emission and applications in sensing and healthcare monitoring.

Keywords:
condensed matter structuresdynamic phosphorescenceion‐drivingpolymer entanglementurinary potassium detection

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Photonic Materials

Background:

  • Controlling condensed matter structures in organic phosphorescent polymers is challenging.
  • External stimuli can modulate emission, but a materials-level principle for hierarchical reorganization is lacking.

Purpose of the Study:

  • To establish ion-driving entanglement as a strategy for reconfigurable hierarchical structures in organic phosphorescence.
  • To demonstrate tunable phosphorescence and potential applications in sensing.

Main Methods:

  • Utilized potassium ions to bridge functional groups in κ-carrageenan (κCG), inducing polymer entanglement.
  • Employed atomic force microscopy (AFM) and rheology to validate structural transformations.
  • Investigated triplet exciton behavior and phosphorescence properties.

Main Results:

  • Achieved tunable phosphorescence from blue to green (CIEy: 0.037-0.382) with long lifetimes (up to 199.50 ms) and high efficiency (17.97%).
  • Demonstrated thermally reversible entanglement for on-demand emission switching.
  • Developed a visual urinary potassium analyzer based on ion-concentration-dependent phosphorescence.

Conclusions:

  • Polymer entanglement is a key design principle for adaptive photonic materials.
  • This approach enables precise control over organic phosphorescence for advanced applications.
  • The developed mechanism shows promise for smart sensing and healthcare monitoring.