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Double-responsive polyampholyte as a nanoparticle stabilizer application to reversible dispersion of gold nanoparticles  
Double-responsive polyampholyte as a nanoparticle stabilizer application to reversible dispersion of gold nanoparticles
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关键词: Double-responsive  polyampholyte  nanoparticle  
资料大小: 240k
所属学科: 高分子化学
来源: 来源网络
简介:
Water-soluble and durable Au nanoclusters, smaller than 4 nm with a narrow size distribution, weresupported on a pH- and solvent-responsive water-soluble polyampholyte (SPES). Such synthesizedAu@SPES hybrids possessed clear pH- and solvent-sensitive properties, and exhibited precipitationbehaviors in response to pH and solvent changes in aqueous solution. Furthermore, the recycledcatalyst could be redissolved in water for reuseviasimple procedures based on the pH-sensitivity of thepolyampholyte. By employing such catalysts, aerobic oxidation of alcohols should be able to be carriedout in a homogeneous manner and may thus give rise to similar catalytic activities and selectivities asthe homogeneous parent system. The phase separation and sensitivity of the SPES-stabilizing Aunanoclusters permitted a facile separation of the clusters from the reaction mixture without anynegative aggregation.
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上传时间: 2015-9-24 13:49:51
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