Scavenging DPPH radicals catalyzed by binary noble metal-dendrimer nanocomposites.
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.
Endo
Takeshi
T
Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
Fukunaga
Takae
T
Yoshimura
Tomokazu
T
Esumi
Kunio
K
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
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