Carbon arc production of heptagon-containing fullerene[68].
Carbon arc production of heptagon-containing fullerene[68].
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碳弧法生产含七元富勒烯[68]
DOI：
10.1038/ncomms1431
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发表时间：
2011-08-09
影响因子：
16.6
通讯作者：
中科院分区：
文献类型：
--
作者：
碳七边形环是导致富勒烯、碳纳米管和石墨烯等sp(2)杂化碳同素异形体结构缺陷的关键单元，从而影响它们的机械、电子和磁性能。先前关于富勒烯中七边形存在的证据仅在离线卤化实验中通过自上而下地将C(2)单元与稳定的富勒烯分离而获得。在这里，我们报道了一种七边形结合的富勒烯C(68)，暂时命名为七富勒烯[68]，它从碳弧等离子体中原位捕获为C(68)Cl(6)。富勒烯中七边形的出现是通过七边形相关的应变消除和温度依赖性稳定性来合理化的。 (13)C标记实验和质量/能量守恒方程模拟表明，七富勒烯[68]在弧区以自下而上的方式与其他富勒烯一起生长。这项工作将富勒烯研究扩展到许多拓扑上可能的七边形掺入异构体，并为理解七边形涉及的富勒烯生长机制和七边形依赖性特性提供了线索。
A carbon heptagon ring is a key unit responsible for structural defects in sp(2)-hybrized carbon allotropes including fullerenes, carbon nanotubes and graphenes, with consequential influences on their mechanical, electronic and magnetic properties. Previous evidence concerning the existence of heptagons in fullerenes has been obtained only in off-line halogenation experiments through top-down detachment of a C(2) unit from a stable fullerene. Here we report a heptagon-incorporating fullerene C(68), tentatively named as heptafullerene[68], which is captured as C(68)Cl(6) from a carbon arc plasma in situ. The occurrence of heptagons in fullerenes is rationalized by heptagon-related strain relief and temperature-dependent stability. (13)C-labelled experiments and mass/energy conservation equation simulations show that heptafullerene[68] grows together with other fullerenes in a bottom-up fashion in the arc zone. This work extends fullerene research into numerous topologically possible, heptagon-incorporating isomers and provides clues to an understanding of the heptagon-involved growth mechanism and heptagon-dependent properties of fullerenes.
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影响因子：
1.7
作者：
Bates, KR;Scuseria, GE
通讯作者：
Scuseria, GE
开笼富勒烯的制备以及通过其孔口掺入小分子
影响因子：
29.4
作者：
Gan, Liangbing;Yang, Dazhi;Huang, Huan
通讯作者：
Huang, Huan
影响因子：
64.8
作者：
IIJIMA, S;ICHIHASHI, T;ANDO, Y
通讯作者：
ANDO, Y
影响因子：
64.8
作者：
IIJIMA, S
通讯作者：
IIJIMA, S
影响因子：
64.8
作者：
Hashimoto, A;Suenaga, K;Iijima, S
通讯作者：
Iijima, S