title: Scavenging DPPH radicals catalyzed by binary noble metal-dendrimer nanocomposites.
abstract: Catalytic activity of gold-platinum, gold-palladium, and platinum-palladium dendrimer nanocomposites for scavenging 1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals was investigated. The gold-platinum and gold-palladium dendrimer nanocomposites were prepared via simultaneous reduction by sodium borohydride in the presence of poly(amidoamine) (PAMAM) dendrimers with amine or carboxyl terminal groups. The particles were not mixtures of monometallic particles but alloyed bimetallic particles. Bimetallic particles exhibited higher catalytic activity than monometallic ones.
authors.affiliation: Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Endo
authors.forename: Takae
authors.initials: T
authors.lastname: Fukunaga
authors.forename: Tomokazu
authors.initials: T
authors.lastname: Yoshimura
authors.forename: Kunio
authors.initials: K
authors.lastname: Esumi
mesh_terms: D000497:Alloys / Q000138:chemical synthesis / Q000737:chemistry*; D001713:Biphenyl Compounds; D002384:Catalysis; D050091:Dendrimers / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry*; D006046:Gold / Q000737:chemistry; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry*; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry; D010316:Particle Size; D010851:Picrates / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry; D013499:Surface Properties
chemical_list: D000497:Alloys; D001713:Biphenyl Compounds; D050091:Dendrimers; D016166:Free Radical Scavengers; D010851:Picrates; D010984:Platinum; D010165:Palladium; D006046:Gold; C004931:1,1-diphenyl-2-picrylhydrazyl