Solid-state structures of peapod bearings composed of finite single-wall carbon nanotube and fullerene molecules
Solid-state structures of peapod bearings composed of finite single-wall carbon nanotube and fullerene molecules
复制标题
DOI：
10.1073/pnas.1406518111
复制
发表时间：
2014-06-10
影响因子：
11.1
通讯作者：
Isobe, Hiroyuki
中科院分区：
文献类型：
--
作者：
Sato, Sota;Yamasaki, Takashi;Isobe, Hiroyuki
碳纳米管和富勒烯的一种超分子组合，即所谓的“豆荚”，引起了人们的极大兴趣，不仅是因为它的物理性质，还因为它独特的碳质实体组装结构。然而，现有的详细结构信息还不足以深入了解其结构化学或由新的物理现象启发的探索性研究，这主要是因为目前可用的碳纳米管具有严重的不均匀性。本文报道了分子豆荚的固态结构。这种结构通过同步加速器x射线衍射在原子水平上用带状持续有限碳纳米管分子进行了解决，揭示了管内存在光滑、无弯曲的赫希菲尔德表面，并且这种光滑性允许C-60客体分子即使在固态下也能进行动态运动。这种精确的结构信息可能会启发碳质机器的分子设计，这些机器纯粹是通过两个中性分子之间的范德华接触组装的。
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 C-60 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.