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arXiv 0807.1589physics.chem-phcond-mat.other
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笼中转子:氢-富勒烯复合物的红外光谱

Rotor in a Cage: Infrared Spectroscopy of an Endohedral Hydrogen-Fullerene Complex

S. Mamone, Min Ge, D. Hüvonen, U. Nagel, A. Danquigny, F. Cuda, M. C. Grossel, Y. Murata, K. Komatsu, M. H. Levitt, T. Rõõm, M. Carravetta

摘要:

本文报道了C60笼内氢分子的量子化平移和转动运动。窄的红外吸收线在6 K的温度下对应于振动激发与平移和旋转激发相结合,并显示出良好的解决分裂由于平移和旋转模式的内H2分子之间的耦合。理论模型表明,C60内部的H2是一个三维量子转子,在近似球形势中运动。该理论提供了所观察到的红外跃迁的频率和强度。通过拟合少量的经验参数来描述约束势,以及邻对比,得到了与实验结果很好的一致性。

英文摘要:

We report the observation of quantized translational and rotational motion of molecular hydrogen inside the cages of C60. Narrow infrared absorption lines at the temperature of 6K correspond to vibrational excitations in combination with translational and rotational excitations and show well resolved splittings due to the coupling between translational and rotational modes of the endohedral H2 molecule. A theoretical model shows that H2 inside C60 is a three-dimensional quantum rotor moving in a nearly spherical potential. The theory provides both the frequencies and the intensities of the observed infrared transitions. Good agreement with the experimental results is obtained by fitting a small number of empirical parameters to describe the confining potential, as well as the ortho to para ratio.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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