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Carbon-13 Magnetic Resonance in Diamonds, Coals, and Graphite.

Authors
Retcofsky-HL; Friedel-RA
Source
J Phys Chem 1973 Jan; 77:68-71
Link
NIOSHTIC No.
10010571
Abstract
Carbon-13 magnetic resonance (13c nmr) spectra of gem-quality diamonds, powdered natural graphite, and four coals were obtained as part of a comprehensive spectral investigation of the structure of coal and other carbonaceous materials. The chemical shift in diamond was found to agree well with empirical predictions based on prior studies of pure aliphatic and alicyclic hydrocarbons. The spectrum of graphite reflects both a chemical shift anisotropy and the semiconductivity of the material. The results for the coals were compared with those for diamond and graphite and found to be best rationalized in terms of increasing carbon aromaticity with increasing coal rank leading finally to the formation of graphite- like structures.
Publication Date
19730101
Document Type
OP;
Fiscal Year
1973
NTIS Accession No.
NTIS Price
Identifying No.
OP 24-73
NIOSH Division
PERC;
Source Name
J. Phys. Chem., V. 77, January 1973, PP. 68-71
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