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Toward synthesis and characterization of unconventional C-66 and C-68 fullerenes inside carbon nanotubes

Research output: Contribution to Journal/MagazineJournal articlepeer-review

  • Viktor Zolyomi
  • Herwig Peterlik
  • Johannes Bernardi
  • Monika Bokor
  • Istvan Laszlo
  • Janos Koltai
  • Jeno Kuerti
  • Martin Knupfer
  • Hans Kuzmany
  • Thomas Pichler
  • Ferenc Simon
<mark>Journal publication date</mark>26/12/2014
<mark>Journal</mark>The Journal of Physical Chemistry C
Issue number51
Number of pages9
Pages (from-to)30260-30268
Publication StatusPublished
Early online date25/11/14
<mark>Original language</mark>English


We present compelling evidence pointing to the possible synthesis of unconventional C-66 and C-68 fullerenes in the interior of single-walled carbon nanotubes. The production proceeds from C(60)(-)toluene/benzene clathrates encapsulated inside the nanotubes using heat-driven nanotesttube chemistry. All isomers violate the so-called isolated pentagon rule and are stabilized solely by the proximity of the wall of the host nanotube. We present detailed characterization of the unconventional fullerenes using Raman spectroscopy, C-13 isotope labeling of the benzene molecules, transmission electron microscopy, X-ray diffractometry, and first-principles calculations. Multiple isomers of both C-66 and C-68 are identified in the sample. We argue that our method opens the way to high-yield synthesis of unconventional fullerenes.