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UV-Vis Investigation on the Hydrocarbon Length Effect on the α-Tocopherol Solubility in an AOT/n-Alkane/Water System

Abstract

The influence of n-alkane hydrocarbon chain length on both binding and distribution constants of α-tocopherol and Aerosol-OT [sodium bis(2-ethylhexyl) sulfosuccinate] reversed micelles were studied with the UV-vis method using n-heptane and n-decane as solvents. The amount of water in the system was determined by R defined as the ratio of water to surfactant molalities (\(R=[\hbox{H$_{2}$O}]/[\hbox{AOT}]\)). No significant water influence on distribution and binding constants was observed. This finding is consistent with earlier results, which indicated that the location of α-tocopherol molecules in the AOT reversed micelles is the palisade layer. The results obtained indicate that the longer hydrocarbon chain length makes surroundings of micelles more ordered and causes some limitations in α-tocopherol access to its palisade layer. This implies a weaker connection to the micellar structure and an increase of α-tocopherol freedom of motion in the space of hydrocarbon tails around polar core.

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References

  1. 1.

    Gitler, C., Montal, M.: Formation of decane-soluble proteolipids: influence of monovalent and divalent cations. FEBS Lett. 28, 329–332 (1972)

    Article  CAS  Google Scholar 

  2. 2.

    Siegel, D.P.: Inverted micellar structures in bilayer membranes. J. Biophys. Soc. 45, 399–420 (1984)

    Article  CAS  Google Scholar 

  3. 3.

    Langevin, D.: Structure of reversed micelles. In: Pileni, M.P. (ed.) Structure and Reactivity in Reversed Micelles, pp. 13–44. Elsevier, Amsterdam (1989)

    Google Scholar 

  4. 4.

    Avellone, G., Bongiorno, D., Ceraulo, L., Ferrugia, M., Turco Liveri, V.: Spectrophotometric investigation of the binding of vitamin E to water-containing reversed micelles. Int. J. Pharm. 234, 249–255 (2002)

    Article  CAS  Google Scholar 

  5. 5.

    Wilczura-Wachnik, H., Yavuz, A.G., Myslinski, A.: Calorimetric study of the α-tocopherol solubility in reversed AOT micelles. J. Colloid Interface Sci. 319, 520–525 (2008)

    Article  CAS  Google Scholar 

  6. 6.

    Fukazawa, K., Chida, H., Tokamura, A., Tsukatani, H.: Antioxidative effect of α-tocopherol incorporation into lecithin liposomes on ascorbic acid-Fe2+ induced lipid peroxidation. Arch. Biochem. Biophys. 206, 173–180 (1981)

    Article  Google Scholar 

  7. 7.

    Urano, S., Iida, M., Otani, I., Matsuo, K.: Membrane stabilization of vitamin E; interaction of α-tocopherol with phospholipids in bilayer liposoms. Biochem. Biophys. Res. Commun. 146, 1413–1418 (1987)

    Article  CAS  Google Scholar 

  8. 8.

    Wassall, S.R., Wang, L., Mc Cabe, R.C.Y., Ehringer, W.D., Stillwell, W.: Electron spin resonance study of the interaction of α-tocopherol with phospholipid model membranes. Chem. Phys. Lipids 60, 29–37 (1991)

    Article  CAS  Google Scholar 

  9. 9.

    Takahashim, M., Tsuchiya, J., Niki, E.: Scavenging of radicals by vitamin E in the membranes as studied by spin labeling. J. Am. Chem. Soc. 111, 6350–6353 (1989)

    Article  Google Scholar 

  10. 10.

    Barbe, M., Patterson, D.: Orientational order and excess entropies of alkane mixtures. J. Phys. Chem. 81, 40–46 (1978)

    Article  Google Scholar 

  11. 11.

    Kotlarczyk, M., Huang, J.S.: Structure of AOT reversed micelles determined by small-angle neutron scattering. J. Phys. 89, 4382–4386 (1985)

    Google Scholar 

  12. 12.

    Magid, L.J., Kon-no, K., Martin, C.A.: Binding of phenols to inverted micelles and microemulsion aggregates. J. Phys. Chem. 85, 1434–1439 (1981)

    Article  CAS  Google Scholar 

  13. 13.

    Urano, S., Matsuo, M., Sakanaka, T., Uemura, I., Koyama, M., Kumadaki, I., Fukuzawa, K.: Mobility and molecular orientation of vitamin E in liposomal membranes as determined by 19F NMR and fluorescence polarization technique. Arch. Biochem. Biophys. 303, 10–14 (1993)

    Article  CAS  Google Scholar 

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Correspondence to Hanna Wilczura-Wachnik.

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Wilczura-Wachnik, H., Gregorczyk, I. & Myslinski, A. UV-Vis Investigation on the Hydrocarbon Length Effect on the α-Tocopherol Solubility in an AOT/n-Alkane/Water System. J Solution Chem 39, 828–834 (2010). https://doi.org/10.1007/s10953-010-9548-3

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Keywords

  • Reversed micelles
  • UV-vis
  • α-Tocopherol
  • n-Alkanes