Solid-state magnetic resonance spectroscopy of fullerenes
Solid-state magnetic resonance spectroscopy of fullerenes
复制标题
富勒烯的固态磁共振波谱
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
A. Mujsce
中科院分区：
文献类型：
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作者：
R. Tycko;R. Haddon;G. Dabbagh;S. H. Glarum;D. C. Douglass;A. Mujsce
作者报告了C{sub 60}和C{sub 60}和C{sub 70}混合物粉末样品的固态{sup 13}C NMR测量。NMR结果表明，在296 K时，C{sub 60}分子在固态下快速各向同性旋转，而C{sub 70}分子的旋转各向异性稍大。这些结果与C{sub 60}的球形几何和C{sub 70}的长椭球几何是一致的。固态C{sub 60}分子的转动相关时间在约100 K时变得大于50 μ s。
The authors report solid-state {sup 13}C NMR measurements on powder samples of C{sub 60} and of a mixture of C{sub 60} and C{sub 70}. The NMR results show that, at 296 K, C{sub 60} molecules rotate rapidly and isotropically in the solid state, while C{sub 70} molecules rotate somewhat more anisotropically. These results are consistent with the proposed spherical geometry of C{sub 60} and prolate spheroidal geometry of C{sub 70}. The rotational correlation time of C{sub 60} molecules in the solid state becomes greater than 50 {mu}s at about 100 K.