2D C-13 NMR OF THE STRUCTURAL TRANSITION IN SOLID C-60

被引：15

作者：

BLINC, R

SELIGER, J

DOLINSEK, J

ARCON, D

机构：

[1] J. Stefan Institute, University of Ljubljana, Ljubljana

来源：

EUROPHYSICS LETTERS | 1993年 / 23卷 / 05期

关键词：

D O I：

10.1209/0295-5075/23/5/009

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Two-dimensional (2D) <<separation of interactions>> C-13 NMR spectra of powdered C60 have been measured above and below the structural phase transition at T(c) = 260 K. The comparison between experimental and simulated C-13 powder lineshapes rules out any kind of uniaxial jump reorientations around a single direction below T(c), as recently suggested. The spectra are, however, compatible with a pseudorandom sequence of small-amplitude uniaxial reorientations around at least three different axes separated by 60-degrees resulting in a quasi-isotropic reorientational motion which gradually freezes out at lower temperatures.

引用

页码：355 / 359

页数：5

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