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A magnetically retrievable air and moisture stable gold and palladium nanocatalyst for efficient C-C coupling reactions.

Authors
  • Goonesinghe, Chatura1
  • Shaik, Mohamed1
  • Ratnaweera, Rivi1
  • Nalin De Silva, K M1
  • De Silva, Rohini M1
  • 1 Centre for Advanced Materials and Devices (CAMD), Department of Chemistry, University of Colombo, Colombo 00300, Sri Lanka. , (Sri Lanka)
Type
Published Article
Journal
Royal Society Open Science
Publisher
The Royal Society
Publication Date
Sep 01, 2020
Volume
7
Issue
9
Pages
200916–200916
Identifiers
DOI: 10.1098/rsos.200916
PMID: 33047052
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

In this study, we report the synthesis of a highly stable, magnetically retrievable gold and palladium nanocatalyst ([email protected]), highly active in Suzuki cross-coupling and related homocoupling reactions. The active catalytic component in this system is palladium, which can only be stabilized in the presence of gold nanoparticles. There is no significant loss of activity even after prolonged storage exposed air and moisture. The versatile nature [email protected] is demonstrated through the selective catalysis of the homocoupling of phenylboronic acid under low concentrations of O2 and the oxidation of phenylboronic acid to phenol under high O2 concentrations. [email protected] also demonstrated Ullmann-type homocoupling of 4-iodotolene with excellent yields. The magnetically retrieved catalyst could be re-used up to six times in Suzuki-Miyaura cross-coupling with consistently high activity and with a minimal loss of the noble metal species. Through these reactions we show that the gold-stabilized [email protected] can be used as stable and recyclable palladium reservoir for multiple palladium-catalysed reactions. © 2020 The Authors.

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