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Related Experiment Videos

A Hydrogen-Bonded Hexagonal Buckybowl Framework.

Ichiro Hisaki1, Hideaki Toda2, Hiroyasu Sato3

  • 1Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan.

Angewandte Chemie (International Ed. in English)
|October 13, 2017
PubMed
Summary

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Molecular Crystals With Reversible Chromic Three-State Crystal-to-Crystal Transformation via the Dynamic Motion of Negatively Curved π-Frameworks.

Chemistry (Weinheim an der Bergstrasse, Germany)·2026

Researchers created novel 2D buckybowl networks using a sumanene derivative. These networks exhibit unique structures and anisotropic shrinking under high pressure, demonstrating new possibilities for bumpy π-sheets.

Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Buckybowls are non-planar polycyclic aromatic hydrocarbons with unique electronic and structural properties.
  • Developing ordered two-dimensional (2D) networks of buckybowls is challenging due to their complex shapes.
  • Supramolecular synthons are crucial for directing the self-assembly of complex molecular architectures.

Purpose of the Study:

  • To design and synthesize a sumanene derivative capable of forming hydrogen-bonded 2D networks.
  • To investigate the structural characteristics of the resulting buckybowl networks.
  • To explore the response of these 2D networks to external stimuli, such as high pressure.

Main Methods:

  • Synthesis of a novel sumanene derivative (CPSM) with peripheral 4,4'-dicarboxy-o-terphenyl groups.
Keywords:
buckybowlshexagonal networkshydrogen bondingpressure responsivenesssumanenes

Related Experiment Videos

  • Characterization of the self-assembled structures using X-ray diffraction and other crystallographic techniques.
  • High-pressure experiments to study the structural changes in the buckybowl networks.

    • Main Results:

    • Two distinct hexagonal network (HexNet) structures, CPSM-1 (waved) and CPSM-2 (bilayered), were successfully synthesized.
    • CPSM-1 features an alternating alignment of upward and downward buckybowls.
    • CPSM-2 forms hamburger-shaped dimer units within a bilayered HexNet structure, creating well-defined bumpy π-sheets.
    • CPSM-2 exhibited anisotropic shrinkage of 11% along the c-axis under 970 MPa pressure due to offset sliding of the π-surfaces.

    Conclusions:

    • This study demonstrates the successful construction of 2D networked buckybowl architectures using a tailored supramolecular synthon.
    • The achieved bumpy π-sheets possess unique structural features and respond dynamically to pressure.
    • The findings open avenues for designing advanced materials with tunable properties based on non-planar π-systems.