Abstract
A distinct fine structure in the NMR spectra of fluorinated graphite intercalation compounds is obtained due to the selective motional averaging of the 'undesirable' intermolecular dipole-dipole interactions. Through analysis of these spectra, the arrangement of the guest molecules has been obtained. A decrease of the activation energy of diffusion with increased molecular concentration has been observed in a stage 1 sample of fluorinated graphite (C2F)n intercalated with acetone. These results are discussed along with similar results for Li diffusion in LixNbSe3 and LixTiS2 from the literature; we propose that such behavior is caused by the formation of a guest sublattice which is incommensurate with the host lattice. Unusual temperature and concentration dependences of the 1H, 203Tl and 205Tl spectra in narrow-pore Tl-natrolite show that the set of positions occupied by water molecules and Tl+ ions changes continuously with the temperature. In this case, the water and Tl sublattice may be incommensurate with the aluminosilicate framework.
Original language | English |
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Pages (from-to) | 1031-1036 |
Number of pages | 6 |
Journal | Journal of Physics and Chemistry of Solids |
Volume | 57 |
Issue number | 6-8 |
DOIs | |
State | Published - 1 Jan 1996 |
Keywords
- A. graphite intercalation compounds
- A. zeolites
- D. diffusion
- D. incommensurate phase
- D. nuclear magnetic resonance (NMR)
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics