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Related Concept Videos

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)00:53

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Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...
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Olefin Metathesis Polymerization: Overview01:13

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Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
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Facile Synthesis of Worm-like Micelles by Visible Light Mediated Dispersion Polymerization Using Photoredox Catalyst
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Responsive Emulsions Enabled by Supramolecular Polymers for Recyclable Biocatalysis.

Jieyao Zhang1, Shan Wang1, Changzhu Wu1,2

  • 1Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Odense, Denmark.

Small (Weinheim an Der Bergstrasse, Germany)
|December 23, 2025
PubMed
Summary

Researchers developed a recyclable emulsion for biocatalysis using supramolecular polymers. This responsive system allows easy recovery and reuse of enzymes and catalysts, advancing sustainable chemical synthesis.

Keywords:
biocatalysiscascadehost‐guest chemistryresponsive emulsionsupramolecular polymer

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Area of Science:

  • Biocatalysis and Green Chemistry
  • Supramolecular Polymer Chemistry

Background:

  • Emulsion biocatalysis utilizes liquid-liquid interfaces for enhanced mass transfer but faces challenges in catalyst and emulsifier recovery.
  • Developing recyclable systems is crucial for sustainable industrial chemical synthesis.

Purpose of the Study:

  • To design a responsive emulsion system for recyclable biocatalysis using supramolecular polymers.
  • To overcome the downstream processing limitations of conventional emulsion systems.

Main Methods:

  • Copolymerization of crown ether acrylate monomers with N-isopropylacrylamide to create amphiphilic supramolecular polymers.
  • Formation of robust emulsions capable of hosting isolated enzymes or whole-cell catalysts.
  • Utilizing reversible host-guest interactions (crown-ether/secondary-ammonium) for supramolecular cross-linking and catalyst recovery.

Main Results:

  • The developed supramolecular polymer-stabilized emulsions demonstrated robust performance, surpassing conventional biphasic systems.
  • A host-guest recognition strategy enabled straightforward recovery and reuse of emulsifiers and catalysts with minimal activity loss.
  • Escherichia coli retained 80% activity over three cycles in the responsive emulsion.
  • Mild pH modulation allowed for reversible switching between emulsion and two-phase states.

Conclusions:

  • Supramolecular polymer-stabilized emulsions offer a versatile and recyclable platform for efficient biocatalysis.
  • This approach provides a general strategy for integrating supramolecular chemistry with green chemical synthesis.
  • The system holds significant potential for sustainable industrial applications.