Abstract
In order to evaluate noncovalent interactions in coal, change in the associated molecular structure of coals in pyridine/CS2 mixed solvents have been investigated. For bituminous coal, variation in L-band EPR spectra with mixing ratio of the solvents is in a close correspondence to that in equilibrium swelling ratio and in molecular mobility obtained from 1H-NMR. The EPR spectra for lignite show similar variation to that for bituminous coal, however, does not correlate with equilibrium swelling ratio and molecular mobility. Since the L-band EPR characteristics appear to reflect the situation of aromatic π-π and charge transfer interactions in coal, these results indicate that swelling in the mixed solvents proceed with the declining of non-covalent interaction, such as aromatic π-π and charge transfer interaction, in coal.
| Original language | English |
|---|---|
| Pages (from-to) | 289-291 |
| Number of pages | 3 |
| Journal | Unknown Journal |
| Volume | 42 |
| Issue number | 1 |
| Publication status | Published - 1997 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Energy(all)
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Change in the associated molecular structure of coals in pyridine/CS2 mixed solvents. / Kumagai, H.; Matuoka, K.; Norinaga, K.; Chiba, T.; Sasaki, M.
In: Unknown Journal, Vol. 42, No. 1, 1997, p. 289-291.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Change in the associated molecular structure of coals in pyridine/CS2 mixed solvents
AU - Kumagai, H.
AU - Matuoka, K.
AU - Norinaga, K.
AU - Chiba, T.
AU - Sasaki, M.
PY - 1997
Y1 - 1997
N2 - In order to evaluate noncovalent interactions in coal, change in the associated molecular structure of coals in pyridine/CS2 mixed solvents have been investigated. For bituminous coal, variation in L-band EPR spectra with mixing ratio of the solvents is in a close correspondence to that in equilibrium swelling ratio and in molecular mobility obtained from 1H-NMR. The EPR spectra for lignite show similar variation to that for bituminous coal, however, does not correlate with equilibrium swelling ratio and molecular mobility. Since the L-band EPR characteristics appear to reflect the situation of aromatic π-π and charge transfer interactions in coal, these results indicate that swelling in the mixed solvents proceed with the declining of non-covalent interaction, such as aromatic π-π and charge transfer interaction, in coal.
AB - In order to evaluate noncovalent interactions in coal, change in the associated molecular structure of coals in pyridine/CS2 mixed solvents have been investigated. For bituminous coal, variation in L-band EPR spectra with mixing ratio of the solvents is in a close correspondence to that in equilibrium swelling ratio and in molecular mobility obtained from 1H-NMR. The EPR spectra for lignite show similar variation to that for bituminous coal, however, does not correlate with equilibrium swelling ratio and molecular mobility. Since the L-band EPR characteristics appear to reflect the situation of aromatic π-π and charge transfer interactions in coal, these results indicate that swelling in the mixed solvents proceed with the declining of non-covalent interaction, such as aromatic π-π and charge transfer interaction, in coal.
UR - http://www.scopus.com/inward/record.url?scp=3242851809&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=3242851809&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:3242851809
VL - 42
SP - 289
EP - 291
JO - Quaternary International
JF - Quaternary International
SN - 1040-6182
IS - 1
ER -