Rotational dynamics of solid fullerene C70 monitored by positive muon spin labels
Rotational dynamics of solid fullerene C70 monitored by positive muon spin labels
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通过正μ子自旋标记监测固体富勒烯 C70 的旋转动力学
DOI：
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发表时间：
1993
期刊：
影响因子：
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通讯作者：
R. Derenzi
中科院分区：
文献类型：
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作者：
T. Dennis;K. Prassides;E. Roduner;L. Cristofolini;R. Derenzi
我们报告了在 73 至 310 K 之间对 C[sub 70] 介子基进行避免能级交叉的介子自旋共振研究的结果。极化介子自旋标记的各向异性超精细相互作用的温度依赖性平均可以根据富勒烯的重新取向动力学来解释。即使在 73 K 时也可能出现围绕长分子轴的单轴旋转。然后在 160 K 时逐渐出现重新取向紊乱，在 270 K 附近进入塑性相的相变过程中持续存在小的各向异性。 26 个参考文献，3 个图。
We report the results of an avoided-level-crossing muon spin resonance study of a muonated radical of C[sub 70] between 73 and 310 K. The temperature-dependent averaging of the anisotropic hyperfine interaction of the polarized muon spin label is interpreted in terms of the reorientation dynamics of the fullerene. Uniaxial rotation about the long molecular axis appears likely even at 73 K. Reorientational disorder then sets in gradually at 160 K with a small anisotropy persisting across the phase transition in the vicinity of 270 K into the plastic phase. 26 refs., 3 figs.