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High-contrast reversible multiple color-tunable solid luminescent ionic polymers for dynamic multilevel

Xiao Ma1, Mingyue Zhou1, Ling Jia1

  • 1Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, Advanced Catalysis and Green Manufacturing Collaborative Innovation Center, School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China. maxiao@cczu.edu.cn.

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Researchers developed new ionic polymers with multiple color-tunable luminescence. These materials offer high-contrast, reversible color changes in solid states, enabling advanced anti-counterfeiting applications.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Optoelectronics

Background:

  • Developing dynamic color-tunable luminescent materials is crucial for advanced anti-counterfeiting technologies.
  • Existing solid-state luminescent materials often face challenges in achieving high-contrast, reversible, and multiple color tunability with facile synthesis and low cost.

Purpose of the Study:

  • To construct high-efficiency, multiple color-tunable luminescent single ionic polymers.
  • To explore the potential of these polymers for advanced multilevel luminescence anti-counterfeiting applications.

Main Methods:

  • Grafting charged multi-color aggregation-induced emission (AIE) chromophores into polymers.
  • Tuning polymer properties via feed ratios, counter anions, and reaction solvents.
  • Investigating stimuli-responsive luminescence through solvent exposure and excitation variations.

Main Results:

  • Successfully synthesized high-efficiency multiple color-tunable luminescent ionic polymers.
  • Achieved rare high-contrast reversible multiple color-tunable emission in solid states triggered by solvent stimuli.
  • Demonstrated excitation-dependent color-tunable emission.
  • Observed solvent-induced microstructure changes affecting AIEgen aggregation states and emission properties.

Conclusions:

  • The developed ionic polymers exhibit unique multiple color-tunable luminescence in response to multiple external stimuli.
  • These materials show significant promise for dynamic multilevel (three-level or more) anti-counterfeiting applications.
  • The findings provide a new strategy for designing advanced functional luminescent materials.