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Electrostatic Interaction-Induced Clusteroluminescence of Polyelectrolyte with UCST Behavior
Qiurui Lin1, Die Luo1, Pan Du1
1School of New Energy and Materials, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
Langmuir : the ACS Journal of Surfaces and Colloids
|January 22, 2026
Summary
Researchers developed a novel polyelectrolyte exhibiting upper critical solution temperature (UCST) behavior by copolymerizing oppositely charged ionic monomers. This approach simplifies synthesis and enhances thermoresponsive luminescent properties for sensing applications.
Area of Science:
- Polymer Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- Zwitterionic polymers typically show upper critical solution temperature (UCST) behavior but have complex synthesis and limited monomer variety.
- Developing new thermoresponsive polymers with simpler synthesis routes is crucial for broader applications.
Purpose of the Study:
- To report a novel polyelectrolyte exhibiting UCST behavior through controlled copolymerization of anionic and cationic monomers.
- To investigate the influence of ionic group content and counterions on polymer conformation and UCST properties.
- To explore the clusteroluminescence behavior of the synthesized polymer and its temperature dependence.
Main Methods:
- Copolymerization of anionic and cationic monomers to create a novel polyelectrolyte.
- Investigation of polymer chain conformation and UCST behavior by varying ionic content and counterions.
- Analysis of clusteroluminescence properties, focusing on aggregation enhancement and temperature-dependent emission.
Main Results:
- The novel polyelectrolyte successfully demonstrated UCST behavior in aqueous solutions.
- Ionic group content and counterion incorporation significantly affected molecular chain conformation and UCST properties.
- The polymer solution exhibited aggregation-enhanced and temperature-dependent clusteroluminescence, intensifying with decreasing temperature due to enhanced electrostatic interactions.
Conclusions:
- A facile method for preparing UCST polymers was established by copolymerizing oppositely charged ionic monomers.
- This approach expands monomer selection for thermoresponsive polymers.
- The developed thermoresponsive luminescent polymers show potential for visualization sensing applications.
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