Water- and organo-dispersible gold nanoparticles supported by using ammonium salts of hyperbranched polystyrene: Preparation and catalysis

Lei Gao, Takashi Nishikata, Keisuke Kojima, Katsumi Chikama, Hideo Nagashima

研究成果: ジャーナルへの寄稿学術誌査読

12 被引用数 (Scopus)

抄録

Gold nanoparticles (1 nm in size) stabilized by ammonium salts of hyperbranched polystyrene are prepared. Selection of the R groups provides access to both water- and organo-dispersible gold nanoparticles. The resulting gold nanoparticles are subjected to studies on catalysis in solution, which include reduction of 4-nitrophenol with sodium borohydride, aerobic oxidation of alcohols, and homocoupling of phenylboronic acid. In the reduction of 4-nitrophenol, the catalytic activity is clearly dependent on the size of the gold nanoparticles. For the aerobic oxidation of alcohols, two types of biphasic oxidation are achieved: one is the catalyst dispersing in the aqueous phase, whereas the other is in the organic phase. The catalysts are reusable more than four times without loss of the catalytic activity. Selective synthesis of biphenyl is achieved by the homocoupling of phenylboronic acid catalyzed by organo-dispersible gold nanoparticles.

本文言語英語
ページ(範囲)3152-3163
ページ数12
ジャーナルChemistry - An Asian Journal
8
12
DOI
出版ステータス出版済み - 12月 2013

!!!All Science Journal Classification (ASJC) codes

  • 生化学
  • 有機化学

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