Solid-state structures of peapod bearings composed of finite single-wall carbon nanotube and fullerene molecules

Sota Sato, Takashi Yamasaki, Hiroyuki Isobe

Research output: Contribution to journalArticlepeer-review

70 Citations (Scopus)


A supramolecular combination of carbon nanotube and fullerene, so-called a peapod, has attracted much interest, not solely because of its physical properties but also for its unique assembled structures of carbonaceous entities. However, the detailed structural information available was not sufficient for in-depth understanding of its structural chemistry or for exploratory research inspired by novel physical phenomena, mainly because of the severely inhomogeneous nature of currently available carbon nanotubes. We herein report solid-state structures of a molecular peapod. This structure, solved with a belt-persistent finite carbon nanotube molecule at the atomic level by synchrotron X-ray diffraction, revealed the presence of a smooth, inflection-free Hirshfeld surface inside the tube, and the smoothness permitted dynamic motion of the C60 guest molecule even in the solid state. This precise structural information may inspire the molecular design of carbonaceous machines assembled purely through van der Waals contacts between two neutral molecules.

Original languageEnglish
Pages (from-to)8374-8379
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number23
Publication statusPublished - 2014 Jun 10


  • Crystal structure
  • Dynamic solid-state structure
  • Host-guest complex
  • Molecular bearing

ASJC Scopus subject areas

  • General


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