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Molecular Shapes01:18

Molecular Shapes

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Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.
Two regions of electron density in a diatomic...
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Related Experiment Video

Updated: Mar 28, 2026

Preparation of a Corannulene-functionalized Hexahelicene by CopperI-catalyzed Alkyne-azide Cycloaddition of Nonplanar Polyaromatic Units
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Designing Tailored Molecular Cavities Using Calix[5]arenes as Building Blocks.

Takehiro Hirao1, Takeharu Haino1,2

  • 1Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashi-Hiroshima, Japan.

Chemical Record (New York, N.Y.)
|March 27, 2026
PubMed
Summary
This summary is machine-generated.

Researchers customized molecular cavities using calix[5]arenes to precisely control guest molecule interactions. This strategic design enables strong binding, selectivity, and responsiveness, advancing host-guest systems.

Keywords:
calixarenefullerene supramolecular polymerhost–guest chemistrysupramolecular chemistry

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science

Background:

  • Host-guest chemistry relies on molecular recognition between host molecules and guest molecules.
  • Designing synthetic host molecules with specific cavity dimensions is crucial for selective guest binding.

Purpose of the Study:

  • To investigate the precise control over cavity shapes and dimensions in molecular structures.
  • To demonstrate the application of custom-designed cavities for selective molecular interactions.

Main Methods:

  • Utilized calix[5]arenes as a platform for creating custom molecular cavities.
  • Characterized the shapes and dimensions of the synthesized cavities.
  • Evaluated the binding affinity and selectivity of the cavities towards specific guest molecules.

Main Results:

  • Successfully created molecular cavities with well-defined shapes and dimensions.
  • Demonstrated precise control over cavity customization through strategic molecular design.
  • Achieved strong binding, high guest selectivity, and stimulus responsiveness in the host-guest systems.

Conclusions:

  • Cavity customization in molecular structures is essential for advanced host-guest systems.
  • Strategic design of molecular cavities enables tailored interactions with guest molecules.
  • These findings have potential applications in molecular recognition and supramolecular materials development.