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An sp-sp2-hybridized molecular carbon allotrope C16 flake

Author

Listed:
  • Wenze Gao

    (Tongji University
    Empa—Swiss Federal Laboratories for Materials Science and Technology)

  • Wei Zheng

    (Tongji University)

  • Luye Sun

    (Tongji University)

  • Faming Kang

    (Tongji University)

  • Zheng Zhou

    (Tongji University)

  • Wei Xu

    (Tongji University)

Abstract

The molecular carbon allotropes have an enduring attraction to chemists and physicists for their elusive structures and extraordinary properties. Cyclo[16]carbon has been produced on the surface and is well characterized, while it is interesting that molecular carbon allotrope, like C16, referring to molecules composed of 16 carbon atoms, presents a fascinating realm of isomeric possibilities. Except for cyclo[16]carbon, C16 isomers with other structures have been predicted only by theory. Here, we report the synthesis and structural characterization of a graphene-shaped isomer, i.e., C16 flake on a bilayer NaCl surface grown on Au(111), using an atom-manipulation strategy by eliminating chlorine from a fully chlorinated pyrene molecule, C16Cl10. The sp- and sp2-hybridized structure of C16 flake is well characterized by bond-resolved atomic force microscopy. Theoretical calculations reveal an open-shell singlet ground state of C16 flake.

Suggested Citation

  • Wenze Gao & Wei Zheng & Luye Sun & Faming Kang & Zheng Zhou & Wei Xu, 2025. "An sp-sp2-hybridized molecular carbon allotrope C16 flake," Nature Communications, Nature, vol. 16(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-63525-9
    DOI: 10.1038/s41467-025-63525-9
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