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Chalcogen-Bonding Supramolecular Polymers.

Rongjin Zeng1, Zehao Gong1, Qiang Yan1

  • 1State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai 200433, China.

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|June 10, 2020
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Summary
This summary is machine-generated.

Researchers developed novel supramolecular polymers using unique chalcogen-bonding interactions. These polymers form hydrogel fibers in water and can be reversibly controlled, opening new avenues in supramolecular materials science.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Organic Chemistry

Background:

  • Exploring novel intermolecular forces is crucial for designing advanced supramolecular materials.
  • Chalcogen bonding, a non-covalent interaction, offers potential for creating unique material architectures.

Purpose of the Study:

  • To report a new class of supramolecular polymers based on chalcogen-bonding interactions.
  • To investigate the formation and properties of these polymers in aqueous media.
  • To explore the tunability and reversibility of chalcogen-bonding-mediated supramolecular assemblies.

Main Methods:

  • Design and synthesis of chalcogen-containing macrocyclic receptors (chalcogena[4]arenes) as chalcogen-bond donors.
  • Noncovalent polymerization of macrocycles with a twin-headed N-oxide dianion surfactant.
  • Characterization of polymer arrays and self-assembled hydrogel fibers.
  • Investigation of the effect of different chalcogen bonds on polymerization and material properties.

Main Results:

  • Successful formation of supramolecular polymers via end-to-end chalcogen-chalcogen complexation (Ch···O⁻).
  • Self-assembly of polymers into supramolecular hydrogel fibers in aqueous solutions.
  • Demonstration that binding chemistries of chalcogen bonds influence polymerization and hydrogel mechanical properties.
  • Reversible disconnection of polymer arrays using competing anions.

Conclusions:

  • Chalcogen bonding provides a novel pathway for constructing supramolecular polymers and hydrogels.
  • The ability to tune properties and reversibility through chalcogen bonds offers new design principles for supramolecular materials.
  • This work expands the scope of unorthodox supramolecular interactions for materials innovation.