Intercalation of molecular species into the interstitial sites of fullerene
Journal Article
·
· Journal of Materials Research; (United States)
- Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)
Molecular species were found to diffuse readily into the octahedral interstitial sites of the fcc lattice of C{sub 60}. The {sup 13}C NMR spectrum of C{sub 60} under magic angle spinning (MAS) conditions consisted of a primary resonance at 143.7 ppm and a minor peak shifted 0.7 ppm downfield. The downfield shift obeys Curie's law and is attributed to the Fermi-contact interaction between paramagnetic oxygen molecules and all 60 carbon atoms of rapidly rotating adjacent C{sub 60} molecules. Exposure of C{sub 60} to 1 kbar oxygen for 1.75 h at room temperature resulted in a spectrum of seven evenly spaced resonances corresponding to the filling of 0 to 6 of the adjacent octahedral interstitial sites with oxygen molecules. The distribution of site occupancies about a C{sub 60} molecule provided evidence that the intercalation process is controlled by diffusion kinetics. Exposure to 0.14 kbar hydrogen gas at room temperature for 16 h filled a substantial fraction of the interstitial sites of C{sub 60} and C{sub 70} with hydrogen molecules.
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 7164309
- Journal Information:
- Journal of Materials Research; (United States), Journal Name: Journal of Materials Research; (United States) Vol. 7:8; ISSN JMREE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360606* -- Other Materials-- Physical Properties-- (1992-)
CARBON
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIFFUSION
ELEMENTS
ENERGY STORAGE SYSTEMS
FCC LATTICES
FULLERENES
IMPURITIES
INTERSTITIALS
MAGNETIC RESONANCE
MOLECULES
NONMETALS
NUCLEAR MAGNETIC RESONANCE
POINT DEFECTS
RESONANCE
360606* -- Other Materials-- Physical Properties-- (1992-)
CARBON
CRYSTAL DEFECTS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DIFFUSION
ELEMENTS
ENERGY STORAGE SYSTEMS
FCC LATTICES
FULLERENES
IMPURITIES
INTERSTITIALS
MAGNETIC RESONANCE
MOLECULES
NONMETALS
NUCLEAR MAGNETIC RESONANCE
POINT DEFECTS
RESONANCE