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Bowl Inversion in an Exo-type Supramolecule in the Solid State.

Yu-Min Liu1, Yu-Qian Huang1, Shun-He Liu1

  • 1Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.

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Summary

Researchers achieved reversible bowl inversion in solid-state supramolecular assemblies. This breakthrough in buckybowl chemistry was observed in trithiasumanene-nanographene complexes using heating-cooling cycles and X-ray diffraction.

Keywords:
bowl inversionbuckybowlsexo-complexsupramolecular chemistry

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Bowl inversion is a unique property of buckybowls, reversing polarity and assembly.
  • Previous studies focused on solution and surface states, with solid-state inversion hindered by spatial constraints.

Purpose of the Study:

  • To investigate exo-type supramolecular assemblies of trithiasumanene and nanographene.
  • To achieve and observe reversible bowl inversion in the solid state.

Main Methods:

  • Synthesized and characterized exo-type supramolecular assemblies of trithiasumanene and nanographene.
  • Tuned electron density of nanographene to modulate binding constants.
  • Applied repeated heating-cooling cycles to induce reversible bowl inversion.
  • Utilized single crystal X-ray diffraction for unambiguous observation.

Main Results:

  • Electron density tuning of nanographene directly influenced complex binding constants.
  • Reversible solid-state bowl inversion was successfully achieved in the weakest binding trithiasumanene-nanographene assembly.
  • The phenomenon was confirmed by single crystal X-ray diffraction.

Conclusions:

  • Demonstrated the feasibility of solid-state bowl inversion in supramolecular assemblies.
  • Established a method for controlling and observing this unique property in the solid state.
  • Opened new avenues for designing functional materials based on buckybowl dynamics.