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Solid state NMR methods for coal science. Progress report, September 15, 1983-December 31, 1983

Technical Report ·
OSTI ID:5370680
Several novel NMR spectroscopic techniques are being developed for application to coal science. Multiple pulse decoupling techniques are being developed to allow high resolution scalar coupled /sup 13/C CP-MAS spectra of coals to be obtained. This method will make the selectivity and increased resolution of J-modulated or 2-D J resolved spectroscopy available for /sup 13/C CP-MAS studies of coals. Other decoupling techniques are being investigated with the objective of more completely decoupling coal spectra and thereby increasing spectral resolution. Solid state spectroscopy of both /sup 13/C and /sup 2/D on an ultra high field NMR spectrometer are to be used for improved resolution. This is expected to be especially true for coals chemically modified with isotopically labelled reagents. /sup 2/D NMR is to be implemented for determining proton aromaticities as well as for following coal chemistry. Several studies of the quantitative aspects of /sup 13/C CP-MAS spectroscopy are being looked at. Instrumental and experimental procedures are being designed to improve quantitation. Complementary relaxation studies and /sup 14/C//sup 13/C labelling experiments are also contemplated as part of this work. In this report initation of the project is described as well as the construction of a new solid state spectrometer. An updated work plan is also presented. 1 figure.
Research Organization:
Yale Univ., New Haven, CT (USA). Dept. of Chemistry
DOE Contract Number:
FG22-83PC60791
OSTI ID:
5370680
Report Number(s):
DOE/PC/60791-1; ON: DE84005644
Country of Publication:
United States
Language:
English

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Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
CARBON 13
CARBON ISOTOPES
CARBONACEOUS MATERIALS
COAL
CONSTRUCTION
ENERGY SOURCES
EVEN-ODD NUCLEI
FOSSIL FUELS
FUELS
ISOTOPES
LIGHT NUCLEI
MATERIALS
MEASURING INSTRUMENTS
NMR SPECTRA
NMR SPECTROMETERS
NUCLEI
RESEARCH PROGRAMS
SPECTRA
SPECTROMETERS
STABLE ISOTOPES
STRUCTURAL CHEMICAL ANALYSIS