Letter | Published:

Enhanced Photoreactivity of Riboflavin in Aqueous Solution in the Presence of Macromolecules

Naturevolume 199pages9991000 (1963) | Download Citation

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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

  1. 1

    Halwer, M., J. Amer. Chem. Soc., 73, 4870 (1951).

  2. 2

    DeLuca, P. P., and Kostenbauder, H. B. (to be published).

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Affiliations

  1. School of Pharmacy, Temple University, Philadelphia, 40

    • H. B. KOSTENBAUDER
    •  & PATRICK P. DELUCA

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DOI

https://doi.org/10.1038/199999a0

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