Abstract
Abstract The radical anion of sodium 9,10-anthraquinone-2-sulfonate, which was produced by the photolysis of the quinone in aerobic aqueous solution (pH 8.0) containing appropriate amounts of anionic and/or non-ionic surfactants, was detected by means of ESR and UV spectroscopy. The formation of the radical anion was observed above pH 6.8. Relationship between the concentration of surfactant and that of the radical anion gave a profile which showed the typical micellar effects. It is suggested that the micelles protect the radical anion from quenchers, such as oxygen, water, and other reagents, because the radical anion is incorporated into the micellar interior.
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