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Issue 2, 2014
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Self-assembly and structural transformations of high-nuclearity palladium-rich polyoxometalates

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Abstract

A one-pot strategy exploiting the structure directing effects of SeIV and TeIV heteroatoms has yielded the highest nuclearity noble metal containing polyoxometalates to date; including the palladium-rich selenotungstate isomers K28[H12Pd10Se10W52O206]·65H2O (1) and K26[H14Pd10Se10W52O206]·68H2O (2), and the nanoscale tellurotungstate cluster Na40[Pd6Te19W42O190]·76H2O (3). These reaction systems exhibit remarkable structural flexibility and point to a new route towards the synthesis of complex heterometallic species, in which multiple lacunary polyoxometalate ‘building blocks’ have been assembled to trap a transient oxopalladate species suspected to play a role in the assembly of several common polyoxopalladates. Mass spectrometry has been applied to explore and compare the solution stability of compounds 1–3, demonstrating the markedly different properties of the SeIV and TeIV templated systems. Electrochemical analysis of 1 has been provided and is dominated by Pd redox processes, with reduction of the cluster resulting in electrodeposition of Pd metal and observation of the subsequent formation of PdO species, concurrent with previously reported oxopalladate containing species.

Graphical abstract: Self-assembly and structural transformations of high-nuclearity palladium-rich polyoxometalates

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Publication details

The article was received on 18 Oct 2013, accepted on 18 Dec 2013 and first published on 17 Jan 2014


Article type: Paper
DOI: 10.1039/C3QI00075C
Citation: Inorg. Chem. Front., 2014,1, 178-185
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    Self-assembly and structural transformations of high-nuclearity palladium-rich polyoxometalates

    J. M. Cameron, J. Gao, D. Long and L. Cronin, Inorg. Chem. Front., 2014, 1, 178
    DOI: 10.1039/C3QI00075C

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