Recent advances in liquid‐phase NMR of the coal‐derived products
Present review focuses on the most recent advances in a liquid‐phase nuclear magnetic resonance (NMR) of the coal‐derived products—coal tar pitches, asphaltenes, and humic and fulvic acids, covering exclusively the results in the liquid‐phase NMR studies leaving apart an overwhelming amount of publi...
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| Published in: | Magnetic resonance in chemistry Vol. 62; no. 11; pp. 775 - 802 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
England
Wiley Subscription Services, Inc
01-11-2024
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Present review focuses on the most recent advances in a liquid‐phase nuclear magnetic resonance (NMR) of the coal‐derived products—coal tar pitches, asphaltenes, and humic and fulvic acids, covering exclusively the results in the liquid‐phase NMR studies leaving apart an overwhelming amount of publications dealing with the solid‐state NMR investigations in this field (which are comprehensively reviewed elsewhere). Owing to the complexity of the coal‐derived products, their 1H and 13C NMR spectra consist of a number of overlapping signals belonging to different hydrocarbon types. Comprehensive studies of coal tar pitches, asphaltenes, and humic and fulvic acids by means of NMR over the past several decades revealed characteristic functional groups of those fractions together with spectral regions in which they resonate. Quantitative 1H and 13C NMR spectra characterize aromatic and saturated carbons spread over many structural moieties, which provides a solid guideline into molecular structure of the coal‐derived products. Nowadays, quantitative 13C NMR measurements yield information about a variety of structural parameters such as functional group distribution, aromaticity, degree of condensation of aromatic rings, and medium chain lengths together with many other more specific parameters. The structural NMR studies of coal and coal‐derived products are developing on a backdrop of a marked progress in computational NMR. At present, we are witnessing an unprecedentedly fast development of theoretical and computational methods in the field of NMR spectroscopy. Discussed in the present review are the most recent advances in the NMR studies of the processing products of peat, lignite or brown coal, anthracite or hard coal, and graphite in solution, like coal tar pitches, asphaltenes, and humic and fulvic acids.
The present review focuses on the most recent advances in a liquid‐phase NMR of the coal‐derived products—coal tar pitches, asphaltenes, and humic and fulvic acids. |
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| Bibliography: | This review is dedicated to late Professor Gennady Aleksandrovich Kalabin, the pioneer of this field in Russia. He was a Doctor of Chemical Sciences, Professor, Honorary Professor of Irkutsk State University, and Honorary Worker of Higher Professional Education of the Russian Federation. At Irkutsk State University, G. A. Kalabin went from a student to a professor. After receiving his graduate diploma in 1963, he worked at the Institute of Biochemistry in Moscow where he completed his PhD degree. From 1970 to 1998, G. A. Kalabin worked at the Institute of Petroleum and Coal Synthesis of Irkutsk State University occupying the positions from junior researcher to the Head of the Laboratory and Dean of the Department of Chemistry. In 1990, he moved to the Peoples' Friendship University of Russia in Moscow. The area of his scientific interests was the development of physical methods for the analysis of natural raw materials like oil, coal, and wood and the products of their processing by means of quantitative NMR spectroscopy. It was under his leadership that the Laboratory of Physical Research Methods became a forge of highly qualified personnel. Over the years of his scientific career, he had supervised 6 DSc and more than 20 PhD dissertations. G. A. Kalabin was the author of 7 books and 220 research papers. His extremely high human qualities and professional skills always attracted students and young scientists to him personally and to his scientific group. He always treated everyone with much respect and friendliness. The bright memory of Gennady Aleksandrovich Kalabin will remain in the hearts of his former colleagues and collaborators. Rest in peace, Gennady! ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 ObjectType-Review-3 content type line 23 |
| ISSN: | 0749-1581 1097-458X 1097-458X |
| DOI: | 10.1002/mrc.5476 |