C{sub 60} rotational dynamics: From 0 to 25 GHz
Journal Article
·
· Bulletin of the American Physical Society
OSTI ID:127760
- IBM Almaden Research Center, San Jose CA (United States); and others
The rotational dynamics of C{sub 60} in the solid state have been characterized by NMR. The relaxation rate due to chemical shift anisotropy is precisely measured by the magnetic field dependence, allowing the molecular reorientational correlation time, {tau}, to be determined. At 283 K {tau} = 9.1 ps; assuming diffusional reorientation this implies a rotational constant D = 1.8x10{sup 10}s{sup {minus}1}. This time is only 3 times longer than the calculated {tau} for free rotations, and is shorter than the value measured for C{sub 60} in solution. The nature of phase transition at 260 K will be discussed, and it is found to be sample-dependent. Data for both the high temperature {open_quotes}rotator{close_quotes} and low temperature {open_quotes}ratchet{close_quotes} phases will be presented.
- OSTI ID:
- 127760
- Report Number(s):
- CONF-920376--
- Journal Information:
- Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 37; ISSN BAPSA6; ISSN 0003-0503
- Country of Publication:
- United States
- Language:
- English
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