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Solid-State 13C and 1H NMR in Kerogen Research: Uncertainty of Aromaticity Estimation

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Abstract:

There is currently interest in the chemical characterization of kerogens, primarily for better understanding of the origin, chemical history, and classifications of these materials. Recently developed methods for obtaining high-resolution 13C and 1H NMR spectra of solids have been exploited in structural characterization of kerogens. In particular, 13C CP/MAS spectroscopy has been extensively used in coal and kerogen studies to determine the aromatic/alkenic (or sp 2-hybridized) fraction (f a ) of total carbon that comprises aromatic/alkenic structures. Such calculations are based on the integrated intensities of the aromatic/alkenic and aliphatic envelopes of 13C NMR spectra.

Keywords: 13C CP/MAS NMR; 1H MAS NMR; Aromaticity; Kerogen

Document Type: Short Communication

DOI: http://dx.doi.org/10.1366/0003702924926835

Affiliations: 1: Laboratory for Geochemistry and Cosmochemistry, Department of Chemistry, University of Niš, P.O. Box 91, 18.000 Niš, Yugoslavia 2: Sektion Physik, Universit├Ąt Leipzig, D-7010, Leipzig, Germany

Publication date: November 1, 1992

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