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N-Bordered Rylene Arches via Programmable Curved π-Extension.

Kai Chen1,2, Zuoyu Li1, Jiangtao Chan1

  • 1Department of Chemistry, Tsinghua University, Beijing, China.

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|June 20, 2026
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Summary
This summary is machine-generated.

Researchers synthesized novel arch-shaped nanoribbons with curved π-surfaces. These nitrogen-bordered carbon structures exhibit unique properties and could form the basis for future carbon nanobelts.

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Area of Science:

  • Materials Science
  • Organic Chemistry
  • Nanotechnology

Background:

  • Curved molecular carbons offer unique properties compared to planar structures.
  • Aromatic ribbons with curved π-surfaces are crucial for circular carbon architectures but are difficult to synthesize.
  • Previous research has yielded limited examples of such nonplanar carbon allotropes.

Purpose of the Study:

  • To report the synthesis and properties of arch-shaped nitrogen-bordered nanoribbons.
  • To demonstrate a programmable curved π-extension strategy for creating these structures.
  • To explore their potential as building blocks for advanced carbon materials.

Main Methods:

  • Utilized a programmable curved π-extension strategy for synthesis.
  • Characterized the nanoribbons using X-ray crystallography.
  • Investigated properties via variable-temperature proton nuclear magnetic resonance (NMR) and theoretical calculations.

Main Results:

  • Successfully synthesized well-defined arch-shaped nitrogen-bordered nanoribbons with continuously curved π-surfaces.
  • X-ray crystallography confirmed the arched topologies.
  • Demonstrated high arch-to-arch inversion barriers and enhanced fluorescence quantum yield in quaterrylene arches.
  • Observed host-guest complex formation with fullerene C60.

Conclusions:

  • The developed strategy enables the synthesis of challenging curved π-systems.
  • These nanoribbons possess unique structural and photophysical properties.
  • This work lays the foundation for the synthesis of carbon nanobelts and other nonplanar carbon architectures.