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.
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M3 - Article
AN - SCOPUS:3242851809
VL - 42
SP - 289
EP - 291
JO - Quaternary International
JF - Quaternary International
SN - 1040-6182
IS - 1
ER -