Issue 12, 2012
From the journal:

Dalton Transactions

Stabilisation of water-soluble platinum nanoparticles by phosphonic acid derivatives†

Mareike Richter,a   Arndt Karschin,a   Bernhard Spingler,b   Peter C. Kunz,*a   Wolfgang Meyer-Zaikac  and  Wolfgang Kläuia  

* Corresponding authors

a Institut für Anorganische Chemie und Strukturchemie, Lehrstuhl I: Bioanorganische Chemie und Katalyse, Heinrich Heine Universität Düsseldorf, Universitätsstraße 1, Düsseldorf, Germany
E-mail: Peter.Kunz@uni-duesseldorf.de
Fax: +49 211 12287
Tel: +49 211 12283

b Institut für Anorganische Chemie, Universität Zürich, Winterthurerstrasse 190, Zürich, Switzerland

c Institut für Anorganische Chemie, Universität Duisburg-Essen, Universitätsstraße 5-7, Essen, Germany

Abstract

Sodium 2-(diphenylphosphino)ethyl phosphonate (1) was investigated as a stabilising agent for platinum nanoparticles (Pt-NPs) in aqueous solution. This phosphino phosphonate is known to stabilise rhodium nanoparticles (NPs) in water. Here we report that in the case of Pt-NPs this ligand is indirectly involved in the stabilisation mechanism and the actual stabilisation agent is the platinum complex Na2[Pt(1)2] (2). The reduction of platinum(II) salts in the presence of the phosphonates 1, 2, sodium 2-(diphenylphosphoryl)ethyl phosphonate (3) and 3,3,3-triphenylpropyl phosphonate (4) leads to stable platinum NPs with a remarkably narrow particle size distribution. These platinum NPs show high catalytic activity in the hydrogenation of 1-hexene and 1-chloro-3-nitrobenzene under biphasic as well as heterogeneous (supported on charcoal) conditions. The activity of the supported NPs was 30 times higher than the commercially available catalyst Pt(0) EnCat®. Furthermore, the single-crystal X-ray structures of (1)(MeOH)2(H2O)2, (3)(H2O)4, and (4)2(H2O)17 have been determined.

Graphical abstract: Stabilisation of water-soluble platinum nanoparticles by phosphonic acid derivatives

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Article information

DOI
https://doi.org/10.1039/C2DT12071B
Article type
Paper
Submitted
01 Nov 2011
Accepted
19 Dec 2011
First published
03 Feb 2012

Dalton Trans., 2012,41, 3407-3413

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Stabilisation of water-soluble platinum nanoparticles by phosphonic acid derivatives

M. Richter, A. Karschin, B. Spingler, P. C. Kunz, W. Meyer-Zaika and W. Kläui, Dalton Trans., 2012, 41, 3407 DOI: 10.1039/C2DT12071B

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