设计合成基于 Au/Ag/Pd 三元金属纳米粒子的催化剂用于 Sonogashira 偶联反应。

Designed synthesis of Au/Ag/Pd trimetallic nanoparticle-based catalysts for Sonogashira coupling reactions.

机构信息

Department of Physical Chemistry, University of Madras, Guindy Campus, Chennai-600 025, Tamilnadu, India.

出版信息

Langmuir. 2010 Jul 20;26(14):12225-9. doi: 10.1021/la101088d.

PMID:20462280

Abstract

Pdnp and Pd containing trimetallic nanoparticles (tnp) are synthesized by chemical method with cetyltrimethylammonium bromide as the capping agent. Compositionally, four different tnp are prepared and the particle sizes are characterized by UV-vis spectra, HR-TEM, and XRD measurements. The catalytic activities of Pdnp and tnp are tested using the Sonogashira C-C coupling reaction. The product yield and recyclability of the recovered catalysts are studied. tnp (1:1:1) exhibited better catalysis than Pdnp, which may be due to the concerted electronic effects of the Au-Ag core onto the Pd shell atoms.

摘要

采用化学方法，以十六烷基三甲基溴化铵为包覆剂，合成了含钯和磷的三金属纳米粒子（tnp）。通过紫外-可见光谱、高分辨率透射电子显微镜和 X 射线衍射测量对组成不同的四种 tnp 进行了粒径表征。采用 Sonogashira C-C 偶联反应测试了 Pdnp 和 tnp 的催化活性，并研究了回收催化剂的产物收率和可循环性。tnp（1:1:1）的催化性能优于 Pdnp，这可能是由于 Au-Ag 核对 Pd 壳原子的协同电子效应所致。