Advanced NMR approaches in the characterization of coal

Technical Report · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5435732

Maciel, G E

A solid-state 2D {sup 1}H-{sup 13}C chemical shift correlation experiment has been developed, refined and applied to representative organic solids ranging room pure, powdered, crystalline compounds to lignite. During the {sup 1}H chemical shift evolution period a 48-pulse elaboration of a recently reported windowless 12-pulse sequence (BB-12) was applied in the {sup 13}C channel for decoupling the {sup 1}H-{sup 13}C dipolar interaction, along with the windowless BLEW-48 for {sup 1}H-{sup 1}H dipolar decoupling. For {sup 1}H{yields}{sup 13}C polarization transfer, the previously reported WIM-24 windowless sequence was used in both the {sup 1}H and {sup 13}C channels. Excellent 2D results are obtained, permitting {sup 1}H peaks to benefit in resolution from the spread of {sup 13}C chemical shifts. Prospects for future techniques and applications are discussed. 23 refs., 8 figs.

• Research Organization: Colorado State Univ., Fort Collins, CO (United States). Dept. of Chemistry
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-90PC90290
• OSTI ID: 5435732
• Report Number(s): DOE/PC/90290-4; ON: DE91018164
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
LIGNITE
NUCLEAR MAGNETIC RESONANCE
CARBON 13
CHEMICAL SHIFT
COAL
ELECTRONIC STRUCTURE
HYDROGEN 1
PROGRESS REPORT
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
BROWN COAL
CARBON ISOTOPES
CARBONACEOUS MATERIALS
DOCUMENT TYPES
ENERGY SOURCES
EVEN-ODD NUCLEI
FOSSIL FUELS
FUELS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MATERIALS
NUCLEI
ODD-EVEN NUCLEI
RESONANCE
STABLE ISOTOPES
010600* - Coal
Lignite
& Peat- Properties & Composition
656002 - Condensed Matter Physics- General Techniques in Condensed Matter- (1987-)
400102 - Chemical & Spectral Procedures