Abstract
THE photoreduction of riboflavin in aqueous buffered solutions illuminated with visible light is considerably enhanced when colloidal substances such as micellar sodium decyl sulphate, the non-ionic surface-active agent polyoxyethylene 20 sorbitanmono-oleate, and the non-ionic polymer polyvinylpyrrolidone are present. Although a part of the catalysis produced by the non-ionic surfactant and the polyvinylpyrrolidone might be attributed to the presence of residual reducing groups, the effect of micellar sodium decyl sulphate appears to be wholly a result of its colloidal nature. Non-micellar sodium decyl sulphate has no effect on the photolysis of riboflavin as illustrated in Fig. 1.
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References
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DeLuca, P. P., and Kostenbauder, H. B. (to be published).
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KOSTENBAUDER, H., DELUCA, P. Enhanced Photoreactivity of Riboflavin in Aqueous Solution in the Presence of Macromolecules. Nature 199, 999–1000 (1963). https://doi.org/10.1038/199999a0
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DOI: https://doi.org/10.1038/199999a0
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