二元贵金属-树枝状大分子纳米复合材料催化清除DPPH自由基。

Scavenging DPPH radicals catalyzed by binary noble metal-dendrimer nanocomposites.

作者信息

Endo Takeshi, Fukunaga Takae, Yoshimura Tomokazu, Esumi Kunio

机构信息

Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.

出版信息

J Colloid Interface Sci. 2006 Oct 15;302(2):516-21. doi: 10.1016/j.jcis.2006.06.053. Epub 2006 Aug 7.

DOI:10.1016/j.jcis.2006.06.053

PMID:16890948

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.

摘要

研究了金铂、金钯和铂钯树枝状大分子纳米复合材料清除1,1-二苯基-2-苦基肼基（DPPH）自由基的催化活性。金铂和金钯树枝状大分子纳米复合材料是在具有胺基或羧基端基的聚（酰胺胺）（PAMAM）树枝状大分子存在下，通过硼氢化钠同时还原制备的。这些颗粒不是单金属颗粒的混合物，而是合金化的双金属颗粒。双金属颗粒表现出比单金属颗粒更高的催化活性。