Coal structure at reactive sites by sup 1 H- sup 13 C- sup 19 F double cross polarization (DCP)/MAS sup 13 C NMR spectroscopy
Conference
·
OSTI ID:5725227
- Oak Ridge National Lab., TN (USA)
The solid state NMR technique, {sup 1}H-{sup 13}C-{sup 31}P double cross polarization (DCP)/MAS {sup 13}C-NMR spectroscopy, uses the direct dipolar interaction between {sup 13}C-{sup 31}P spin pairs in organophosphorus substances to identify the subset of carbons within a spherical volume element of 0.4 nm radius centered on the {sup 31}P atom. In combination with chemical manipulation of coals designed to introduce phosphorus containing functionality into the organic matrix, the NMR experiment becomes a method to examine selectively the carbon bonding network at the reactive sites in the coal. This approach generates a statistical structure description of the coal at the reaction centers in contrast to bulk carbon characterization using conventional {sup 1}H-{sup 13}C CP/MAS {sup 13}C NMR spectroscopy. 3 refs.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- Sponsoring Organization:
- DOE/ER
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 5725227
- Report Number(s):
- CONF-891001-4; ON: DE89013549
- Country of Publication:
- United States
- Language:
- English
Similar Records
Double cross polarization /sup 13/C-NMR experiment in solid fossil fuel structure analysis
sup 13 C- sup 31 P cross polarization between isolated spin pairs in organophosphorus substances: Intramolecular structure and internuclear distance determinations in spinning solids
Local structure evaluation in solid organophosphorus compound by double cross polarization carbon-13 nuclear magnetic resonance spectroscopy
Conference
·
Thu Dec 31 23:00:00 EST 1987
· Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)
·
OSTI ID:5975038
sup 13 C- sup 31 P cross polarization between isolated spin pairs in organophosphorus substances: Intramolecular structure and internuclear distance determinations in spinning solids
Journal Article
·
Wed Oct 10 00:00:00 EDT 1990
· Journal of the American Chemical Society; (USA)
·
OSTI ID:6226266
Local structure evaluation in solid organophosphorus compound by double cross polarization carbon-13 nuclear magnetic resonance spectroscopy
Journal Article
·
Wed Aug 03 00:00:00 EDT 1988
· J. Am. Chem. Soc.; (United States)
·
OSTI ID:6220908
Related Subjects
01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
CARBON 13
CARBON ISOTOPES
CARBONACEOUS MATERIALS
CHEMICAL BONDS
COAL
ENERGY SOURCES
EVEN-ODD NUCLEI
FLUORINE 19
FLUORINE ISOTOPES
FOSSIL FUELS
FUELS
HYDROGEN 1
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS
MOLECULAR STRUCTURE
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
PHOSPHORUS 21
PHOSPHORUS ISOTOPES
POLARIZATION
SPECTRA
SPECTROSCOPY
STABLE ISOTOPES
010600* -- Coal
Lignite
& Peat-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
CARBON 13
CARBON ISOTOPES
CARBONACEOUS MATERIALS
CHEMICAL BONDS
COAL
ENERGY SOURCES
EVEN-ODD NUCLEI
FLUORINE 19
FLUORINE ISOTOPES
FOSSIL FUELS
FUELS
HYDROGEN 1
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MATERIALS
MOLECULAR STRUCTURE
NMR SPECTRA
NUCLEI
ODD-EVEN NUCLEI
PHOSPHORUS 21
PHOSPHORUS ISOTOPES
POLARIZATION
SPECTRA
SPECTROSCOPY
STABLE ISOTOPES