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Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.

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Synthesis of Terpolymers at Mild Temperatures Using Dynamic Sulfur Bonds in PolyS-Divinylbenzene

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Sustainable Design of Dynamic Poly(disulfide)s.

Qi Zhang¹, Ben L Feringa^1,2, Da-Hui Qu¹

¹Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, China.

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|December 22, 2025

Summary

Researchers developed dual dynamic poly(disulfide)s from biobased thioctic acid. These sustainable polymers offer tunable properties and closed-loop chemical recyclability for advanced material applications.

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Area of Science:

Polymer Chemistry
Materials Science
Sustainable Chemistry

Background:

Traditional plastics pose environmental challenges due to their inert nature.
Dynamic chemistry, including supramolecular and dynamic covalent chemistry, offers pathways to engineer robust yet recyclable polymers.
A scarcity of versatile dual dynamic building blocks hinders the development of advanced functional materials.

Purpose of the Study:

To design and develop novel dual dynamic poly(disulfide)s using a biobased feedstock.
To explore the integration of dynamic covalent and supramolecular chemistry within a single polymer system.
To demonstrate the recyclability and potential applications of these novel polymeric materials.

Main Methods:

Utilizing thioctic acid, a biobased molecule, as a building block for disulfide-mediated ring-opening polymerization.
Developing scalable, solvent-free polymerization techniques under mild conditions.
Employing supramolecular side-chain engineering via noncovalent cross-linking to tune material properties.

Main Results:

Successfully synthesized dual dynamic poly(disulfide)s with tunable mechanical properties and dynamic functions.
Demonstrated closed-loop chemical recyclability, enabling high-yield recovery of virgin-quality monomers.
Showcased potential applications in self-healing elastomers, adhesives, and shape-memory materials.

Conclusions:

Dual dynamic poly(disulfide)s represent a promising class of sustainable materials with inherent recyclability.
Thioctic acid serves as an effective and versatile biobased building block for advanced polymer design.
These materials offer a viable alternative to traditional plastics, paving the way for circular economy solutions in polymer science.