The distribution constants of vitamin E partitioned between apolar organic phase and water-containing reversed micelles of sodium bis (2-ethylhexyl) sulfosuccinate (AOT), didodecyldimethylammonium bromide (DDAB), soybean phosphatidylcholine (lecithin) and tetraethylene glycol monododecyl ether (C12E4) have been evaluated by a spectrophotometric method. The results suggest that in the presence of domains from apolar organic solvent to surfactant and to water, vitamin E is partitioned between the micellar palisade layer and the organic solvent and also that its binding strength to reversed micelles depends mainly by specific interactions between the head group of vitamin E and that of the surfactant. Moreover, in addition to the advantageous interactions between vitamin E and water, the dependence of the distribution constants upon the molar ratio R (R=[water]/[surfactant]) indicates a competition between water and vitamin E for the binding sites at the water/surfactant interface. The biological implications of the preferential location and confinement of vitamin E in water-containing reversed micelles are discussed. © 2002 Elsevier Science B.V. All rights reserved.

Avellone, G., Bongiorno, D., Ceraulo, L., Ferrugia, M., & TURCO LIVERI, V. (2002). Spectrophotometric investigation of the binding of vitamin E to water-containing reversed micelles. INTERNATIONAL JOURNAL OF PHARMACEUTICS, 234(1-2), 249-255 [10.1016/S0378-5173(01)00970-X].

Spectrophotometric investigation of the binding of vitamin E to water-containing reversed micelles

AVELLONE, Giuseppe;BONGIORNO, David;CERAULO, Leopoldo;FERRUGIA, Mirella;TURCO LIVERI, Vincenzo
2002

Abstract

The distribution constants of vitamin E partitioned between apolar organic phase and water-containing reversed micelles of sodium bis (2-ethylhexyl) sulfosuccinate (AOT), didodecyldimethylammonium bromide (DDAB), soybean phosphatidylcholine (lecithin) and tetraethylene glycol monododecyl ether (C12E4) have been evaluated by a spectrophotometric method. The results suggest that in the presence of domains from apolar organic solvent to surfactant and to water, vitamin E is partitioned between the micellar palisade layer and the organic solvent and also that its binding strength to reversed micelles depends mainly by specific interactions between the head group of vitamin E and that of the surfactant. Moreover, in addition to the advantageous interactions between vitamin E and water, the dependence of the distribution constants upon the molar ratio R (R=[water]/[surfactant]) indicates a competition between water and vitamin E for the binding sites at the water/surfactant interface. The biological implications of the preferential location and confinement of vitamin E in water-containing reversed micelles are discussed. © 2002 Elsevier Science B.V. All rights reserved.
Avellone, G., Bongiorno, D., Ceraulo, L., Ferrugia, M., & TURCO LIVERI, V. (2002). Spectrophotometric investigation of the binding of vitamin E to water-containing reversed micelles. INTERNATIONAL JOURNAL OF PHARMACEUTICS, 234(1-2), 249-255 [10.1016/S0378-5173(01)00970-X].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/243654
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