A wide investigation of the solubilization of the water-soluble salt Yb(NO3)(3) in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelles and AOT liquid crystals has been carried out. After saturation of water/AOT/organic solvent w/o microemulsions with pure Yb(NO3)(3), the Yb(NO3)(3)/AOT composites were prepared by complete evaporation under vacuum of the volatile components (water and organic solvent) of the salt-containing microemulsions. It was observed that these composites can be totally dissolved in pure n-heptane or CCl4, allowing the solubilization of a noticeable amount of Yb(NO3)(3) in quite dry apolar media. By UV-vis-NIR, FT-IR, and H-1 NMR spectroscopies, some information on the state of Yb(NO3)(3) within AOT reverse micelles were acquired, whereas by small angle X-ray scattering (SAXS), it has been ascertained that Yb(NO3)(3) is quite homogeneously distributed as very small clusters among the reverse micelles. An analysis of SAXS and wide-angle X-ray scattering spectra of Yb(NO3)(3)/AOT composites leads to the hypothesis that, also in these systems, Yb(NO3)(3) is dispersed in the surfactant matrix as very small clusters.

CERAULO L, FILIZZOLA F, LONGO A, RUGGIRELLO A, & TURCO LIVERI V (2006). Physicochemical Investigation of the Solubilization of Ytterbium Nitrate in AOT Reverse Micelles and Liquid Crystals. COLLOID AND POLYMER SCIENCE, 284(10), 1085-1095 [10.1007/s00396-006-1485-8].

Physicochemical Investigation of the Solubilization of Ytterbium Nitrate in AOT Reverse Micelles and Liquid Crystals

CERAULO, Leopoldo;FILIZZOLA, Felice;RUGGIRELLO, Angela Monia;TURCO LIVERI, Vincenzo
2006

Abstract

A wide investigation of the solubilization of the water-soluble salt Yb(NO3)(3) in sodium bis(2-ethylhexyl)sulfosuccinate (AOT) reverse micelles and AOT liquid crystals has been carried out. After saturation of water/AOT/organic solvent w/o microemulsions with pure Yb(NO3)(3), the Yb(NO3)(3)/AOT composites were prepared by complete evaporation under vacuum of the volatile components (water and organic solvent) of the salt-containing microemulsions. It was observed that these composites can be totally dissolved in pure n-heptane or CCl4, allowing the solubilization of a noticeable amount of Yb(NO3)(3) in quite dry apolar media. By UV-vis-NIR, FT-IR, and H-1 NMR spectroscopies, some information on the state of Yb(NO3)(3) within AOT reverse micelles were acquired, whereas by small angle X-ray scattering (SAXS), it has been ascertained that Yb(NO3)(3) is quite homogeneously distributed as very small clusters among the reverse micelles. An analysis of SAXS and wide-angle X-ray scattering spectra of Yb(NO3)(3)/AOT composites leads to the hypothesis that, also in these systems, Yb(NO3)(3) is dispersed in the surfactant matrix as very small clusters.
CERAULO L, FILIZZOLA F, LONGO A, RUGGIRELLO A, & TURCO LIVERI V (2006). Physicochemical Investigation of the Solubilization of Ytterbium Nitrate in AOT Reverse Micelles and Liquid Crystals. COLLOID AND POLYMER SCIENCE, 284(10), 1085-1095 [10.1007/s00396-006-1485-8].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/24878
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