title: Fulleropeptide esters as potential self-assembled antioxidants.
abstract: The potential use of amphiphilic fullerene derivatives as a bionanomaterial was investigated by cyclic voltammetry (CV), scanning electron microscopy (SEM), and the ferrous ion oxidation-xylenol orange (FOX) method. Despite the disrupted delocalization of the π-electronic system over the C60 sphere, its antioxidant capacity remained high for all twelve derivatives. The compounds expressed up to two-fold and 5-12-fold better peroxide quenching capacity as compared to pristine C60 and standard antioxidant vitamin C, respectively. During precipitation and slow evaporation of the solvent, all compounds underwent spontaneous self-assembly giving ordered structures. The size and morphology of the resulting particles depend primarily on the sample concentration, and somewhat on the side chain structure.
authors.affiliation: Institute of Chemistry, Technology and Metallurgy, Center for Chemistry, University of Belgrade, Njegoševa 12, P.O. Box 473, 11001 Belgrade, Serbia.
authors.forename: Mira S
authors.initials: MS
authors.lastname: Bjelaković
authors.affiliation: Institute of Chemistry, Technology and Metallurgy, Center for Chemistry, University of Belgrade, Njegoševa 12, P.O. Box 473, 11001 Belgrade, Serbia.
authors.forename: Tatjana J
authors.initials: TJ
authors.lastname: Kop
authors.affiliation: Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, P.O. Box 51, 11158 Belgrade, Serbia.
authors.forename: Jelena
authors.initials: J
authors.lastname: Đorđević
authors.affiliation: Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, P.O. Box 51, 11158 Belgrade, Serbia.
authors.forename: Dragana R
authors.initials: DR
authors.lastname: Milić
keywords: FOX assay; antioxidant activity; cyclic voltammetry; fulleropeptide esters; scanning electron microscopy