Fluorescence Emitted During the Autooxidation of 2,3,4,6-tetrahydroxy-5H-benzocyclohepten-5-one |
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| Authors: | M Lipski |
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| Institution: | (1) Department of Radio & Photochemistry, Institute of Chemistry & Technical Electrochemistry, Faculty of Chemical Technology, Poznan University of Technology, Piotrowo 3 str., 60-965 Poznan, Poland |
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| Abstract: | Data suggest that the purpurogallin (2,3,4,6-tetrahydroxy-5H-benzocyclohepten-5-one, hydroxybenzotropolone) and its analogues formed from the polyphenols can be precursors of the most complex natural compounds—humic acids and melanin-like polymers. Therefore, to confirm this possibility, the autooxidation of purpurogallin to humus-like substances has been performed. The oxidation process has been assayed by means of fluorescence and UV/VIS absorption spectroscopy. The obtained results indicate that purpurogallin undergoes a free-radical-mediated autooxidation via purpurogallinquinones to humus-like polymers. The scheme of the complex transformation of purpurogallin has been proposed. |
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| Keywords: | Hydroxybenzotropolone humic acids emission/absorption ecological aspects |
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