Solid-state structures of peapod bearings composed of finite single-wall carbon nanotube and fullerene molecules
Open Access
- 27 May 2014
- journal article
- research article
- Published by National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 111 (23) , 8374-8379
Abstract
Significance: Carbonaceous entities possessing tubular and spherical shapes spontaneously form a host–guest complex. This supramolecular complex, so-called a peapod, is unique among host–guest pairs in that it is assembled solely by van der Waals interactions at the concave–convex interface of sp 2 -carbon networks. Recently, a molecular version of this supramolecular system revealed the presence of the extremely tight association concomitantly with the dynamic motions of the guest in apolar media. In this paper, an atomic-level structure of the molecular peapod is revealed by a crystallographic method to show the presence of an inflection-free surface inside the tubular molecule. Enjoying rotational freedom at this smooth surface, the guest fullerene molecule rolls dynamically even in the solid state.Keywords
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