STRUCTURAL AND DYNAMIC PROPERTIES OF THE C-60/N-PENTANE INCLUSION COMPOUND - SOLID-STATE C-13 NUCLEAR-MAGNETIC-RESONANCE INVESTIGATIONS

Variable-temperature solid-state C-13 NMR studies of the C60/n-pentane inclusion compound are reported, aimed towards understanding the structural and dynamic consequences of a low-temperature phase transition in this material. The phase transition occurs over a wide temperature range, between ca. 210 and 173 K. In the high-temperature phase, the two ends of the n-pentane molecule exchange rapidly (on the C-13 NMR timescale) between two crystallographically inequivalent end-group environments, whereas, in the low-temperature phase, this exchange process does not occur (on the C-13 NMR timescale).