TY - JOUR
T1 - Confinement of Chiral Molecules in Reverse Micelles: FT-IR, polarimetric and VCD investigation on the state of dimethyl tartrate in sodium bis(2-ethylhexyl) sulfosuccinate reverse micelles dispersed in carbon tetrachloride
AU - Turco Liveri, Vincenzo
AU - Ruggirello, Angela Monia
AU - Abbate, Sergio
AU - Longhi, Giovanna
PY - 2008
Y1 - 2008
N2 - The state of d and l-dimethyl tartrate confined within dry sodium bis(2-ethylhexyl) sulfosuccinate(AOT) reverse micelles dispersed in CCl4 has been investigated by FT-IR spectroscopy, polarimetry, andvibrational circular dichroism (VCD). Measurements have been performed at 25 ◦C as a function of thesolubilizate-to-surfactant molar ratio (R) at a fixed AOT concentration (0.158 M). The analysis of experimentaldata is consistent with the hypothesis that both enantiomers of dimethyl tartrate are mainlyentrapped in the reverse micelles and located in proximity to the surfactant head-group region. Theformation of this interesting self-organized chiral nanostructure involves some changes of the typicalH-bonding of dimethyl tartrates in the pure solid state or as monomers dispersed in CCl4 attributable tothe establishment of specific solubilizate/surfactant head-group interactions and confinement effects.
AB - The state of d and l-dimethyl tartrate confined within dry sodium bis(2-ethylhexyl) sulfosuccinate(AOT) reverse micelles dispersed in CCl4 has been investigated by FT-IR spectroscopy, polarimetry, andvibrational circular dichroism (VCD). Measurements have been performed at 25 ◦C as a function of thesolubilizate-to-surfactant molar ratio (R) at a fixed AOT concentration (0.158 M). The analysis of experimentaldata is consistent with the hypothesis that both enantiomers of dimethyl tartrate are mainlyentrapped in the reverse micelles and located in proximity to the surfactant head-group region. Theformation of this interesting self-organized chiral nanostructure involves some changes of the typicalH-bonding of dimethyl tartrates in the pure solid state or as monomers dispersed in CCl4 attributable tothe establishment of specific solubilizate/surfactant head-group interactions and confinement effects.
KW - Dimethyl tartrate
Sodium bis(2-ethylhexyl) sulfosuccinate
Reverse micelles
Chiral nanostructures
FT-IR spectroscopy
Vibrational circular dichroism
Optical rotation
KW - Dimethyl tartrate
Sodium bis(2-ethylhexyl) sulfosuccinate
Reverse micelles
Chiral nanostructures
FT-IR spectroscopy
Vibrational circular dichroism
Optical rotation
UR - http://hdl.handle.net/10447/35063
M3 - Article
VL - 327
SP - 44
EP - 50
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
ER -