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Related Experiment Video

Updated: Apr 27, 2026

Microwave-assisted Functionalization of Polyethylene glycol and On-resin Peptides for Use in Chain Polymerizations and Hydrogel Formation
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Precision PEGylated polymers obtained by sequence-controlled copolymerization and postpolymerization modification.

Sansanee Srichan1, Hatice Mutlu, Nezha Badi

  • 1Precision Macromolecular Chemistry Group, Institut Charles Sadron, CNRS-UPR 22, 23 rue du Loess, 67034 Strasbourg Cedex 2 (France).

Angewandte Chemie (International Ed. in English)
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Summary

Sequence-controlled copolymerization enables precise synthesis of functional polymers with water-soluble poly(ethylene glycol) (PEG) side chains. This method offers versatility for creating advanced materials with tailored properties.

Keywords:
alkyne-azide cycloadditiondonor-acceptor copolymerizationpostpolymerization modificationsequence-controlled polymerswater-soluble polymers

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Organic Synthesis

Background:

  • Developing polymers with controlled architectures and functionalities is crucial for advanced applications.
  • Poly(ethylene glycol) (PEG) side chains impart water solubility and biocompatibility to polymers.
  • Precise control over copolymer microstructure is challenging yet highly desirable.

Purpose of the Study:

  • To synthesize sequence-controlled copolymers incorporating water-soluble poly(ethylene glycol) (PEG) side chains.
  • To compare different synthetic routes for achieving high-precision functional copolymers.
  • To demonstrate the versatility of the optimized method for incorporating diverse functionalities.

Main Methods:

  • Sequence-controlled copolymerization of styrene derivatives and N-substituted maleimides.
  • Two synthetic routes were evaluated: direct use of PEG-styrene macromonomer and post-polymerization PEGylation via copper-catalyzed alkyne-azide cycloaddition.
  • Characterization of copolymer structures and functionalities.

Main Results:

  • The post-polymerization PEGylation route using an alkyne-functionalized comonomer proved more versatile.
  • High-precision copolymers with controlled sequences and PEG side chains were successfully synthesized.
  • Copolymers with precisely positioned fluorescent (pyrene), switchable (azobenzene), and reactive (activated ester) functionalities were prepared.

Conclusions:

  • Post-polymerization PEGylation offers a versatile strategy for synthesizing precisely structured functional copolymers.
  • This approach enables the incorporation of multiple, well-defined functionalities alongside PEG side chains.
  • The developed method provides a powerful tool for creating advanced polymeric materials with tailored properties.