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Adaptive Se-Te Metathesis Controlled by Cucurbituril-Based Host-Guest Interaction.

Cheng Liu1, Zhiheng Zhang1, Zhiyuan Fan1

  • 1Key Lab of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.

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Cucurbituril host-guest interactions control dynamic selenium-tellurium reactions. This adaptive chemistry system uses cucurbit[6]uril to lock diselenide bonds, enabling equilibrium regulation for functional materials.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Dynamic Covalent Chemistry

Background:

  • Adaptive chemistry requires precise control over reaction dynamics and equilibria.
  • Host-guest interactions offer a powerful strategy for molecular recognition and control.

Purpose of the Study:

  • To develop an equilibrium-adaptive system using cucurbituril-based host-guest interactions.
  • To regulate the dynamic metathesis of diselenide and ditelluride bonds.

Main Methods:

  • Integration of cucurbituril (CB[6] and CB[7]) with dynamic diselenide/ditelluride chemistry.
  • Utilizing selective binding of cucurbiturils to control reaction pathways.
  • Employing the 'locking effect' of CB[6] to reverse Se-Te metathesis.

Main Results:

  • CB[6] selectively bound diselenide, locking its dynamic nature.
  • CB[7] bound diselenide, ditelluride, and exchange products.
  • The selective locking by CB[6] enabled the reversal of Se-Te products to reactants, demonstrating equilibrium regulation.

Conclusions:

  • Cucurbituril-based host-guest interactions can effectively regulate dynamic diselenide chemistry.
  • This approach establishes an equilibrium-adaptive system for Se-Te metathesis.
  • The findings pave the way for designing functional materials with tunable reactivity.