Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Tuesday 19th September 2017 from 8.00am to 4.00pm (BST).

During this time our website performance may be temporarily affected. If you have any questions please use the feedback button available under our menu button. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 11, 2013
Previous Article Next Article

Bimetallic gold–palladium alloy nanoclusters: an effective catalyst for Ullmann coupling of chloropyridines under ambient conditions

Author affiliations

Abstract

An efficient method for the Ullmann coupling of chloropyridines catalyzed by poly(N-vinylpyrrolidone) (PVP)-stabilized bimetallic Au–Pd alloy nanoclusters (NCs) under ambient conditions is demonstrated. The reaction does not occur with either gold or palladium single-metal clusters alone, nor with a physical mixture of the two metals. The experimental results indicate that the inclusion of Au as a nearest heteroatom is crucial to initiate the coupling and its composition up to 50% is essential to accelerate the reaction. Unlike the conventional transition metal catalysis, 2-chloropyridine was found to be highly reactive as compared to 2-bromopyridine. From the UV-vis and ICP-AES measurements, a significant amount of leached Pd(II) was observed in the coupling with 2-bromopyridine as compared with 2-chloropyridine, indicating that the leaching process might be a crucial factor in diminishing the reactivity.

Graphical abstract: Bimetallic gold–palladium alloy nanoclusters: an effective catalyst for Ullmann coupling of chloropyridines under ambient conditions

Back to tab navigation

Publication details

The article was received on 01 May 2013, accepted on 03 Jul 2013 and first published on 03 Jul 2013


Article type: Paper
DOI: 10.1039/C3CY00303E
Citation: Catal. Sci. Technol., 2013,3, 3030-3035
  •   Request permissions

    Bimetallic gold–palladium alloy nanoclusters: an effective catalyst for Ullmann coupling of chloropyridines under ambient conditions

    R. N. Dhital, C. Kamonsatikul, E. Somsook and H. Sakurai, Catal. Sci. Technol., 2013, 3, 3030
    DOI: 10.1039/C3CY00303E

Search articles by author

Spotlight

Advertisements