Application of New ESR Spectroscopies to Coal Studies.
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- IKOMA Tadaaki
- Institute for Chemical Reaction Science, Tohoku University
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- ITO Osamu
- Institute for Chemical Reaction Science, Tohoku University
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- TERO(KUBOTA) Shozo
- Institute for Chemical Reaction Science, Tohoku University
Bibliographic Information
- Other Title
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- 新しいESR法を用いた石炭ラジカルの研究
- アタラシイ ESRホウ オ モチイタ セキタン ラジカル ノ ケンキュウ
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Abstract
In this review, it is described that new information can be obtained by applying new ESR methods to the radicals contained in coals. High frequency ESR measurements enable us to observe the highly resolved ESR signals. Thus, the mechanism of linewidth broadening of the ESR signals for coal radicals can be discussed in terms of the spin exchange, the hyperfine interaction and the anisotropy of g-value. By pulsed ESR measurements, various kinds of spectra such as nutation spectra and HYSCORE (hyperfine sublevel correlation spectroscopy) spectra are obtained. The nutation method confirms the spin multiplicity of coal radicals. The 1H-and 13C-hyperfine signals are separately observed in HYSCORE spectra. In comparison with the model compounds, main coal radicals are attributed to the radicals with highly symmetrically condensed aromatic hydrocarbons.
Journal
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- Journal of the Japan Institute of Energy
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Journal of the Japan Institute of Energy 78 (12), 980-987, 1999
The Japan Institute of Energy
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Keywords
Details 詳細情報について
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- CRID
- 1390001204358892032
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- NII Article ID
- 130003825121
- 10005375562
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- NII Book ID
- AN10373883
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- ISSN
- 18826121
- 09168753
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- NDL BIB ID
- 4942446
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed