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Aromaticity of coal extract by 1H and 13C pulsed n.m.r. methods

✍ Scribed by Tetsuro Yokono; Kunio Miyazawa; Yuzo Sanada

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 426 KB
Volume: 57
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(78)90041-8

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✦ Synopsis

High-resolution gated decoupling 13C spectra of soluble materials such as coal extracts have been analysed to evaluate the carbon aromaticity if,). A correlation was found between fa and the reciprocal of the square of the shorter component in spin-spin relaxation time (Tz), which was obtained by pulsed 1 H n.m.r. in the solid state at low temperature. Values of carbon aromaticity for several coals as received were estimated by using the above correlation and compared with those by van Krevelen's densimetric method.

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