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Issue 8, 2011
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An anionic D-valine–palladium(II) complex supported on a hydroxy double salt with a Brønsted basic phosphate anion: application for a heterogeneous catalyst toward aerobic alcohol oxidation

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Abstract

An anionic D-valine–Pd(II) complex intercalated into an anion exchangeable Ni–Zn mixed basic salt (NiZn), which is classified as a layered hydroxy double salt, was synthesised in situ via a simple anion exchange procedure. A Brønsted basic PO43 anion was also intercalated into the NiZn interlayer along with the anionic D-valine–Pd(II) complex. The Brønsted basic clay–Pd(II) nanocomposite catalysed the aerobic oxidation of a wide variety of alcohols to the corresponding aldehydes and ketones. In the aerobic oxidation of 1-phenylethanol, for example, a turnover number (TON) of 2000 based on Pd was achieved. During the aerobic alcohol oxidation, the D-valine–Pd(II) complex in the NiZn interlayer maintained its original monomeric Pd(II) structure due to the strong electrostatic interaction between the NiZn host and the anionic Pd(II) complex. This catalyst could be reused without loss of either catalytic activity or selectivity for the aerobic oxidation of alcohols.

Graphical abstract: An anionic d-valine–palladium(ii) complex supported on a hydroxy double salt with a Brønsted basic phosphate anion: application for a heterogeneous catalyst toward aerobic alcohol oxidation

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Publication details

The article was received on 17 Jun 2011, accepted on 25 Jul 2011 and first published on 22 Aug 2011


Article type: Paper
DOI: 10.1039/C1CY00223F
Citation: Catal. Sci. Technol., 2011,1, 1376-1382

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    An anionic D-valine–palladium(II) complex supported on a hydroxy double salt with a Brønsted basic phosphate anion: application for a heterogeneous catalyst toward aerobic alcohol oxidation

    T. Hara, J. Sawada, Y. Nakamura, N. Ichikuni and S. Shimazu, Catal. Sci. Technol., 2011, 1, 1376
    DOI: 10.1039/C1CY00223F

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