Development of instrumental techniques for coal surface analysis: Functional group analysis in coal by /sup 31/ NMR spectroscopy: Quarterly report, 1 April 1988--30 June 1988
A selection of phosphorus-containing compounds has been evaluated as potential derivatizing reagents for the analysis, by /sup 31/P NMR spectroscopy, of labile hydrogen functional groups in coal-derived materials. These reagents include dioxaphospholanes (1--5), a diazaphospholane (6), dithiaphospholanes (7--9), and a dithiaphosphorane (10). These reagents have been tested on a large number of model compounds and model compound mixtures for their ability to separate the /sup 31/P chemical shift ranges associated with derivatized functional groups (i.e., phenols, alcohols, carboxylic acids, amines, and thiols) and to resolve within these ranges chemical shifts due to the variety of organic substituents on the functional group. Thus far, reagent 7 has been found to yield the best results. Preliminary screening of a low-temperature coal pyrolysis condensate derivatized with 7 demonstrates the potential of this reagent for the identification and possible quantitation of individual heteroatom components in condensates. 9 refs., 3 figs., 1 tab.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6983518
- Report Number(s):
- IS-4974; ON: DE89003766
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ALCOHOLS
AMINES
AROMATICS
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMICAL SHIFT
COAL
DERIVATIZATION
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROXY COMPOUNDS
ISOTOPES
KINETICS
LIGHT NUCLEI
MAGNETIC RESONANCE
MATERIALS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
ODD-EVEN NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHENOLS
PHOSPHORUS 31
PHOSPHORUS COMPOUNDS
PHOSPHORUS ISOTOPES
PROGRESS REPORT
REACTION KINETICS
REAGENTS
RESONANCE
SCREENING
STABLE ISOTOPES
SURFACES
THIOLS