Spin-mapping of coal structures with ESE and ENDOR
The goals of this program include developing a system for the analysis of the chemical forms of organic sulfur in coal and for study of coal particle surfaces by multifrequency EPR spectroscopy, ENDOR, and ESE spectroscopy and Applying it to coals, to the effects of treatment upon their sulfur-containing organic components, and to related carbonaceous materials (chars and the like). The approach is to utilize the naturally-occurring unpaired electrons in the organic structures of coals as spies to provide molecular structure information, reading out the information with Electron Paramagnetic Resonance (EPR) spectroscopy. Several forms of EPR are employed: Multifrequency continuous-wave (CW) EPR, from 1 GHz to 240 GHz source frequency; electron-nuclear double resonance (ENDOR), in which NMR spectra at paramagnetic centers are obtained by EPR detection; and pulsed EPR, including ESE (Electron Spin Echo) spectroscopy.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-88PC88921
- OSTI ID:
- 5127691
- Report Number(s):
- DOE/PC/88921-13; ON: DE92015513
- Country of Publication:
- United States
- Language:
- English
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Spin-mapping of coal structures with ESE and ENDOR
Spin-mapping of coal structures with ESE and ENDOR
Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
COAL
SURFACES
ORGANIC SULFUR COMPOUNDS
CHEMICAL ANALYSIS
ELECTRON SPIN RESONANCE
MICROSTRUCTURE
PROGRESS REPORT
SPECTROSCOPY
CARBONACEOUS MATERIALS
CRYSTAL STRUCTURE
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
MAGNETIC RESONANCE
MATERIALS
ORGANIC COMPOUNDS
RESONANCE
010600* - Coal
Lignite
& Peat- Properties & Composition
400102 - Chemical & Spectral Procedures