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Reversible Structural Transformation Between a Hopf Link and a Solomon Link.

Hui-Min Li1, Pan-Pan Hua1, Jun-Wen Wang1

  • 1Key Laboratory of Magnetic Molecules and Magnetic Information Materials of the Ministry of Education, School of Chemistry and Chemical Engineering, Shanxi Normal University, Taiyuan, P. R. China.

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Summary
This summary is machine-generated.

Researchers demonstrated reversible topological transformations between Hopf and Solomon links using silver(I) ions. This discovery enables dynamic control over complex molecular architectures, paving the way for advanced materials.

Keywords:
Hopf linkSolomon linkbinuclear Cp*Rh/Ir acceptorcatenanestructural transformation

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Area of Science:

  • Supramolecular Chemistry
  • Chemical Synthesis
  • Materials Science

Background:

  • Molecular topology explores the properties of molecules that are invariant under continuous deformation.
  • Constructing complex topological structures like links requires precise control over molecular assembly.
  • Metal ions are often employed as templates to direct the formation of specific supramolecular architectures.

Purpose of the Study:

  • To demonstrate the reversible topological transformation between Hopf and Solomon links.
  • To utilize the chemical reactivity of silver(I) ions for templating and topological control.
  • To investigate the role of metal-ion coordination in directing self-assembly and topological changes.

Main Methods:

  • Template-free self-assembly of semirigid ligands to form macrocycles and Hopf links.
  • Introduction of silver(I) ions to induce topological transformation into Solomon links.
  • Reversal of topological transformation via reduction of silver(I) ions or reaction with chloride ions.
  • Metal-ion-templated assembly using bipyridyl ligands and Cp*Rh acceptors.

Main Results:

  • Successful synthesis of macrocycles and Hopf links via self-assembly.
  • Demonstration of reversible topological transformation between Hopf and Solomon links mediated by Ag(I) ions.
  • Observation of topological transformation reversal upon Ag(I) ion reduction or reaction with chloride ions.
  • Formation of both Solomon and Hopf links through metal-ion templating, with Solomon links transforming into Hopf links over time.

Conclusions:

  • Silver(I) ions can template the construction of Solomon links.
  • A novel, reversible topological transformation process between Hopf and Solomon links has been achieved.
  • This work provides a new method for dynamic control over molecular topology using metal ions.