Complexation of Palladium(II) with Unsaturated Dithioethers – A Systematic Development of Highly Selective Ligands for Solvent Extraction (Eur. J. Inorg. Chem. 14/2012)

Authors

  • Juliane Traeger,

    1. University of Potsdam, Institute of Chemistry, Department of Inorganic Chemistry, Karl-Liebknecht-Straße 24–25, 14476 Potsdam, Germany, Fax: +49-331-977-5055
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  • Tillmann Klamroth,

    1. University of Potsdam, Institute of Chemistry, Department of Theoretical Chemistry, Karl-Liebknecht-Straße 24–25, 14476 Potsdam, Germany
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  • Alexandra Kelling,

    1. University of Potsdam, Institute of Chemistry, Department of Inorganic Chemistry, Karl-Liebknecht-Straße 24–25, 14476 Potsdam, Germany, Fax: +49-331-977-5055
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  • Susanne Lubahn,

    1. University of Potsdam, Institute of Chemistry, Department of Inorganic Chemistry, Karl-Liebknecht-Straße 24–25, 14476 Potsdam, Germany, Fax: +49-331-977-5055
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  • Ernst Cleve,

    1. Hochschule Niederrhein, Institute for Coatings and Surface Chemistry, Frankenring 20, 47798 Krefeld, Germany
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  • Wulfhard Mickler,

    1. University of Potsdam, Institute of Chemistry, Department of Inorganic Chemistry, Karl-Liebknecht-Straße 24–25, 14476 Potsdam, Germany, Fax: +49-331-977-5055
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  • Matthias Heydenreich,

    1. University of Potsdam, Institute of Chemistry, Department of Analytical Chemistry, Karl-Liebknecht-Straße 24–25, 14476 Potsdam, Germany
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  • Holger Müller,

    1. University of Potsdam, Institute of Chemistry, Department of Inorganic Chemistry, Karl-Liebknecht-Straße 24–25, 14476 Potsdam, Germany, Fax: +49-331-977-5055
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  • Hans-Jürgen Holdt

    1. University of Potsdam, Institute of Chemistry, Department of Inorganic Chemistry, Karl-Liebknecht-Straße 24–25, 14476 Potsdam, Germany, Fax: +49-331-977-5055
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Abstract

The cover picture shows an opened door to a new route in solvent extraction chemistry. By studying a number of unsaturated dithioethers, H.-J. Holdt et al. have been systematically searching for a selective extractant for the recovery of palladium(II). With the help of a combination of basic research methods, such as theoretical calculations and spectroscopic measurements (magnifying glass), the structure of the chelates has been tuned to fulfill the requirements for use in practice. The washcoat of used automotive catalysts (REM picture) contains, besides palladium, a wide spectrum of other metals. As denoted in the “door” diagram showing two immiscible phases, the ligand of choice exhibits very good extraction performance and is able to selectively transfer palladium(II) from the aqueous phase (dissolved catalyst) into the organic one. This enables recovery of this precious metal from (chemically) challenging secondary sources. Details are discussed in the article on p. 2341 ff.

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