title: Electrochemical and spectroscopic characterization of organic compound uptake in silica core-shell nanocapsules.
abstract: Oil-filled silica nanocapsules consisting of a hydrophobic liquid core and a silicate shell have been shown to efficiently extract hydrophobic compounds from aqueous media. With a view toward quantifying the selectivity of these systems, a series of electrochemical and spectroscopic measurements was performed. Uptake and kinetics experiments were carried out through electrochemical measurements by using solutions of lipophilic electroactive molecules of different sizes and with different affinities for silica. Other solutions with fluorescent probes were used for spectrophotometry measurements. In this work we report the environment where the lipophilic compounds studied end up after absorption and the kinetics of their uptake by the oil-filled silica nanocapsules with different shell thicknesses.
authors.affiliation: Department of Chemistry and Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611-7200, USA.
authors.forename: Thomas J
authors.initials: TJ
authors.lastname: Joncheray
authors.forename: Pierre
authors.initials: P
authors.lastname: Audebert
authors.forename: Evan
authors.initials: E
authors.lastname: Schwartz
authors.forename: Aleksa V
authors.initials: AV
authors.lastname: Jovanovic
authors.forename: Omar
authors.initials: O
authors.lastname: Ishaq
authors.forename: Jorge L
authors.initials: JL
authors.lastname: Chávez
authors.forename: Robert
authors.initials: R
authors.lastname: Pansu
authors.forename: Randolph S
authors.initials: RS
authors.lastname: Duran