Analysis of the reactivity and selectivity of fullerene dimerization reactions at the atomic level
Analysis of the reactivity and selectivity of fullerene dimerization reactions at the atomic level
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DOI：
10.1038/nchem.482
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发表时间：
2010-02-01
期刊：
影响因子：
21.8
通讯作者：
Iijima, Sumio
中科院分区：
文献类型：
--
作者：
Koshino, Masanori;Niimi, Yoshiko;Iijima, Sumio
高分辨率电子显微镜已被证明是有用的，因为它能够提供小分子及其运动的时间分辨率图像。这一领域的下一个挑战之一是通过监测反应分子原子位置随时间的变化来可视化化学反应。这样的图像可能提供了其他实验方法无法获得的信息。在这里，我们报道了富勒烯和金属富勒烯分子在碳纳米管中的双分子反应随电子剂量的变化。富勒烯在二聚化过程中如何运动的图像揭示了两个分子相互作用的特定方向，以及在它们首次接触后如何发生键重组。对浓度、样品温度、催化剂效应和加速电压的研究表明，在各种条件下都可以对反应进行成像。
High-resolution transmission electron microscopy has proved useful for its ability to provide time-resolved images of small molecules and their movements. One of the next challenges in this area is to visualize chemical reactions by monitoring time-dependent changes in the atomic positions of reacting molecules. Such images may provide information that is not available with other experimental methods. Here we report a study on bimolecular reactions of fullerene and metallofullerene molecules inside carbon nanotubes as a function of electron dose. Images of how the fullerenes move during the dimerization process reveal the specific orientations in which two molecules interact, as well as how bond reorganization occurs after their initial contact. Studies on the concentration, specimen temperature, effect of catalyst and accelerating voltage indicate that the reactions can be imaged under a variety of conditions.