The Semiquinone Radical of Tocopherol
- 25 March 1949
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 109 (2830), 313-314
- https://doi.org/10.1126/science.109.2830.313
Abstract
Tocopherol dissolved in a mixture of ether, alcohol, and pentene rapidly develops an orange-red color when the soln. is frozen at the temp. of liquid air and irradiated with u.-v. light. The color persists after the irradiation as long as the soln. is frozen, and is due to the formation of a semiquinone, similar to that formed by hydroquinone, in far higher concn. than is thermodynamically possible in liquid solvent. This places tocopherol in the category of reversible oxidation-reduction vitamin-enzyme systems.Keywords
This publication has 3 references indexed in Scilit:
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- OCCURRENCE AND SIGNIFICANCE OF SEMIQUINONE RADICALSAnnals of the New York Academy of Sciences, 1940
- Potentiometric and Magnetometric Study of the Duroquinone SystemJournal of the American Chemical Society, 1938