Pulse radiolytic investigation of perfluorinated surfactants in aqueous solutions

Pulse radiolytic investigation of perfluorinated surfactants in aqueous solutions Pulse radiolysis studies were performed for aqueous solutions of ammonium perfluorooctanoate, tetraethylammonium perfluorooctyl sulfonate, and an ammonium salt of a carboxylic perfluoropolyether derivative. The protiated system of sodium octanoate was also examined for comparison. The rate constants of hydrated electron (e− aq) and ·OH radical reactions with these amphiphiles, and absorption spectra of the intermediate products are reported for the first time. It is demonstrated that the critical micellar concentrations (CMC) can be determined from the kinetic data. The observed differences in e− aq reactivity towards fluorinated amphiphiles above CMC are rationalized in terms of different charge density at the micellar interface. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Pulse radiolytic investigation of perfluorinated surfactants in aqueous solutions

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Publisher
Brill Academic Publishers
Copyright
Copyright © 2000 by VSP
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1163/156856700X00381
Publisher site
See Article on Publisher Site

Abstract

Pulse radiolysis studies were performed for aqueous solutions of ammonium perfluorooctanoate, tetraethylammonium perfluorooctyl sulfonate, and an ammonium salt of a carboxylic perfluoropolyether derivative. The protiated system of sodium octanoate was also examined for comparison. The rate constants of hydrated electron (e− aq) and ·OH radical reactions with these amphiphiles, and absorption spectra of the intermediate products are reported for the first time. It is demonstrated that the critical micellar concentrations (CMC) can be determined from the kinetic data. The observed differences in e− aq reactivity towards fluorinated amphiphiles above CMC are rationalized in terms of different charge density at the micellar interface.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jan 1, 2000

References

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