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Reaction kinetics of hydrated electrons in a quaternary micro emulsion system: A pulse radiolysis study
Author(s) -
Adhikari S.,
Joshi Ravi,
Gopinathan C.
Publication year - 1998
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/(sici)1097-4601(1998)30:10<699::aid-kin1>3.0.co;2-q
Subject(s) - radiolysis , chemistry , solvated electron , reaction rate constant , micelle , kinetics , quenching (fluorescence) , electron , emulsion , chemical kinetics , cyclohexane , photochemistry , aqueous solution , organic chemistry , fluorescence , physics , quantum mechanics
The pulse‐radiolysis technique has been employed to produce and study the kinetics of hydrated electrons (e aq − ) in a quaternary micro emulsion (Sodium Lauryl Sulfate (NaLS)/water/cyclohexane/1‐pentanol) system. Two orders of magnitude higher life time (20 μs) of the e aq − has been obtained as compared to that in reverse micelles reported earlier. Several probes including a biomolecule have been used to determine the water pool concentrations and quenching constants ( k q ). The observed yield and half life ( t 1/2 ) of the hydrated electrons vary smoothly as the water droplet sizes are changed. The bimolecular rate constants for the reaction of e aq − with different solutes have been determined. It has been observed that the measured bimolecular rate constants for the reaction of hydrated electrons with different solutes are indicative of the solubilization sites, the water core sizes, and the surrounding environment. © 1998 John Wiley & Sons, Inc. Int J Chem Kinet: 30: 699–705, 1998