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Related Experiment Video

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A Do-it-yourself System for Scheduled Feeding of Laboratory Rodents in Their Home Cage
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A coordination cage with an adaptable cavity size.

Sebastian Mirtschin1, Adam Slabon-Turski, Rosario Scopelliti

  • 1Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.

Journal of the American Chemical Society
|September 24, 2010
PubMed
Summary
This summary is machine-generated.

A novel hexanuclear coordination cage expands significantly, creating a large cavity. This expansion enables the successful encapsulation of two coronene molecules within its structure.

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Area of Science:

  • Supramolecular Chemistry
  • Coordination Chemistry
  • Materials Science

Background:

  • Coordination cages are supramolecular structures with tunable properties.
  • Controlling cavity size is crucial for molecular encapsulation applications.

Purpose of the Study:

  • To develop a hexanuclear coordination cage with a dynamic cavity.
  • To investigate the cage's ability to encapsulate polycyclic aromatic hydrocarbons.

Main Methods:

  • Synthesis of a hexanuclear metal-organic framework.
  • Variable-temperature X-ray diffraction to study structural changes.
  • Gas adsorption and desorption isotherms to determine cavity volume.
  • Crystallography to confirm the encapsulation of guest molecules.

Main Results:

  • The hexanuclear coordination cage exhibits a significant change in cavity volume, from near zero to over 500 Å(3).
  • The cage successfully encapsulated two coronene molecules within its expanded cavity.
  • Structural analysis confirmed the presence and orientation of the encapsulated coronene molecules.

Conclusions:

  • The developed coordination cage demonstrates remarkable dynamic cavity expansion.
  • This dynamic behavior allows for the size-selective encapsulation of large guest molecules like coronene.
  • The findings open new avenues for host-guest chemistry and molecular recognition using adaptable supramolecular architectures.