On the possibility that cyclodextrins´ chiral cavities can be available on AOT n-heptane reverse micelles. A UV-visible and induced circular dichroism study.

OSCAR FERNANDO SILVA; JUANA SILBER; RITA HOYOS DE ROSSI; NÉSTOR MARIANO CORREA; MARIANA ADELA FERNÁNDEZ

American Chemical Society

Lugar: Washington; Año: 2007 vol. 111 p. 10703 - 10703

p>The formation of reverse micelles (RMs) of sodium 1,4-bis (2-ethylhexyl) sulfosuccinate (AOT) in n-heptane including two different b -CD derivatives (hydroxypropyl-b -CD, hp-b -CD, and decenyl succinyl-b -CD, Mod-b -CD) is reported. Both cyclodextrins can be incorporated into AOT RMs in different zones within the aggregate while b -CD is not. Using UV?Vis and induced circular dichroism spectroscopy (ICD) and different achiral molecular probes (some azo dyes, p-nitroaniline and ferrocene) it was possible to determine that Mod-b -CD is located with its cavity at the oil side of the AOT RM interface while for hp-b -CD the cavity is inside the RMs water pool. Among the molecular probes used, methyl orange (MO) was the only one which gave the ICD signal when dissolved in the