title: The effect of micellization on the EPR spectra and reactivity of 2,2,4,4-tetramethylpiperidinoxyl (TEMPO) radicals.
abstract: A series of 4-alkanoyloxy-2,2,6,6-tetramethylpiperidinoxyl radicals was prepared, and their reactivity in water vis-à-vis antioxidant Trolox was compared. Spectral (electron paramagnetic resonance) and dynamic-light-scattering measurements suggested the formation of micelles for the more hydrophobic members of the series. The observed increase in reactivity for the micelle-forming radicals reflected the increased local concentration of the radical fragment on the micellar interface. Copyright © 2016 John Wiley & Sons, Ltd.
authors.affiliation: Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago, Chile. carolina.aliaga@usach.cl.|Centro para el Desarrollo de la Nanociencia y la Nanotecnología (CEDENNA), Santiago, Chile. carolina.aliaga@usach.cl.
authors.forename: Carolina
authors.initials: C
authors.lastname: Aliaga
authors.affiliation: Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago, Chile.
authors.forename: Marcos Caroli
authors.initials: MC
authors.lastname: Rezende
authors.affiliation: Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40 Correo 33, Santiago, Chile.
authors.forename: Geraldine
authors.initials: G
authors.lastname: Mena
mesh_terms: D000975:Antioxidants / Q000737:chemistry; D002839:Chromans / Q000737:chemistry; D003497:Cyclic N-Oxides / Q000737:chemistry*; D004578:Electron Spin Resonance Spectroscopy; D005609:Free Radicals / Q000737:chemistry; D057927:Hydrophobic and Hydrophilic Interactions; D008027:Light; D008823:Micelles; D008958:Models, Molecular; D012542:Scattering, Radiation
chemical_list: D000975:Antioxidants; D002839:Chromans; D003497:Cyclic N-Oxides; D005609:Free Radicals; D008823:Micelles; C010643:6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid; C003959:TEMPO
keywords: antioxidant activity; micelles; radical reactivity; tetramethylpiperidinoxyl (TEMPO) derivatives