"Snap-Shooting" the Interface of AOT Reverse Micelles: Use of Chemical Trapping

The first use of the phenyl cation trapping technique in “snap‐shooting” the local molar concentrations of water and sulfosuccinate head‐groups in the interfacial region of AOT‐2,2,4‐trimethylpentane‐water reverse micelles has been accomplished. Our results demonstrate that the interfacial concentra...

Full description

Saved in:
Bibliographic Details
Published in:Chemistry : a European journal 2000-08, Vol.6 (15), p.2847-2853
Main Authors: Srilakshmi, Gollapudi Venkata, Chaudhuri, Arabinda
Format: Article
Language:English
Subjects:
chemical trapping
diazo compounds
interfacial concentrations
micelles
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The first use of the phenyl cation trapping technique in “snap‐shooting” the local molar concentrations of water and sulfosuccinate head‐groups in the interfacial region of AOT‐2,2,4‐trimethylpentane‐water reverse micelles has been accomplished. Our results demonstrate that the interfacial concentrations of the sulfosuccinate head‐groups in AOT (0.1 M)‐2,2,4‐trimethylpentane‐water reverse micelles are remarkably high (2.75–2.34 M) across the W0 (the molar ratio of water to surfactant) range 12 to 44. However, the interfacial concentrations of water in AOT‐2,2,4‐trimethylpentane‐water reverse micelles across the same range of solution compositions are significantly lower (27.9–32.0 M) than the molar concentration of bulk water (55.5 M). The present results provide new insight on the microenvironments of interfacially located enzymes such as lipases entrapped in AOT‐2,2,4‐trimethylpentane‐water reverse micelles, the most extensively exploited reverse‐micellar system in micellar biotechnology.
ISSN:0947-6539
1521-3765
DOI:10.1002/1521-3765(20000804)6:15<2847::AID-CHEM2847>3.0.CO;2-Q