Abstract
WE have obtained uncorrelated ultraviolet-visible fluorescence spectra of a coal-hydrogenation asphaltene, a coal-tar pitch, a neutral oil from coal carbonization, and pyridine extracts of vitrains from five coals as part of a comprehensive spectral investigation of the chemical structure of coal and related materials. Although light-induced chemiluminescence in the visible has been detected in solutions of coal derivatives1 and infrared fluorescence has been observed for coals and a few related materials2, the technique of ultraviolet-visible fluorescence spectrometry has not been previously applied to studies of the structure of coal.
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References
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RETCOFSKY, H., BRENDEL, T. & FRIEDEL, R. Ultraviolet-Visible Fluorescence Spectra of Coal Extracts and Related Materials. Nature Physical Science 240, 18–19 (1972). https://doi.org/10.1038/physci240018a0
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DOI: https://doi.org/10.1038/physci240018a0
