Toward Synthesis and Characterization of Unconventional C66 and C68 Fullerenes inside Carbon Nanotubes

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• 作者：Viktor Z贸lyomi ; Herwig Peterlik ; Johannes Bernardi ; M贸nika Bokor ; Istv谩n L谩szl贸 ; J谩nos Koltai ; Jen艖 K眉rti ; Martin Knupfer ; Hans Kuzmany ; Thomas Pichler ; Ferenc Simon
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：December 26, 2014
• 年：2014
• 卷：118
• 期：51
• 页码：30260-30268
• 全文大小：380K
• ISSN：1932-7455

文摘

We present compelling evidence pointing to the possible synthesis of unconventional C₆₆ and C₆₈ fullerenes in the interior of single-walled carbon nanotubes. The production proceeds from C₆₀-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, ¹³C isotope labeling of the benzene molecules, transmission electron microscopy, X-ray diffractometry, and first-principles calculations. Multiple isomers of both C₆₆ and C₆₈ are identified in the sample. We argue that our method opens the way to high-yield synthesis of unconventional fullerenes.