title: Pickering emulsion stabilized by catalytic polyoxometalate nanoparticles: a new effective medium for oxidation reactions.
abstract: Decyl-, dodecyl-, and tetradecyltrimethylammonium cations were combined with the catalytic polyoxometalate [PW(12)O(40)](3-) anion to give spherical and monodisperse nanoparticles that are able to stabilize emulsions in the presence of water and an aromatic solvent. This triphasic liquid/solid/liquid system, based on a catalytic surfactant, is particularly efficient as a reaction medium for epoxidation reactions that involve hydrogen peroxide. The reactions proceed at competitive rates with straightforward separation of the phases by centrifugation. Such catalytic "Pickering" emulsions combine the advantages of heterogeneous catalysis and biphasic catalysis without the drawbacks (e.g., catalyst leaching or separation time).
authors.affiliation: Université Lille Nord de France, Université Lille 1, ENSCL, EA 4478, Chimie Moléculaire et Formulation, 59655 Villeneuve d'Ascq Cedex, France.
authors.forename: Loïc
authors.initials: L
authors.lastname: Leclercq
authors.forename: Adrien
authors.initials: A
authors.lastname: Mouret
authors.forename: Anna
authors.initials: A
authors.lastname: Proust
authors.forename: Véronique
authors.initials: V
authors.lastname: Schmitt
authors.forename: Pierre
authors.initials: P
authors.lastname: Bauduin
authors.forename: Jean-Marie
authors.initials: JM
authors.lastname: Aubry
authors.forename: Véronique
authors.initials: V
authors.lastname: Nardello-Rataj