Abstract
In this study coals from the Ostrava-Karviná basin, and their products obtained by extraction using quinoline, were examined. Solid state 1H n.m.r. spectroscopy, employing magic-angle spinning (MAS) and multiple-pulse sequences (BR-24) at 270 MHz gave spectra of coals and coal-derived solids in which aromatic and aliphatic hydrogens were resolved. Solid state 13C n.m.r. spectra were measured using cross polarization (CP) in conjunction with dipolar decoupling (DD) and magic-angle spinning (MAS) at 15.09 MHz. Structural parameters were calculated using modified Brown-Ladner equations, and significant differences could be observed.
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