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Issue 44, 2018
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Bottom-up synthesis of functionalized {Ce4(SiW9O34)2(L)2} polyoxometalates

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Abstract

The reaction of Na10[SiW9O34] with the 4f tetravalent cerium cation associated with four different organic O/N-donor ligands at pH = 4–4.5 gives rise to the formation of five anionic polyoxometalates [Ce43-O)2(SiW9O34)2(C4H5O4)2]10− (1), [Ce43-O)2(SiW9O34)2(C5H7O4)2]10− (2), [Ce43-O)2(SiW9O34)2(C5H8O2–NH3)2]8− (3), [Ce43-O)2(SiW9O34)2(C6H10O2–NH3)2]8− (4) and [(Ce33-O)(μ2-OH)3)(Ce63-O)43-OH)4)(SiW9O34)4]21− (5). Compounds 1–4 consist of one tetranuclear Ce-based cluster fragment stabilized by two [SiW9O34]10− polyanions and two organic linkers. Compound 5 is composed of a hexanuclear core combined with a trinuclear cerium core, stabilized by four [SiW9O34]10− moieties. The molecular species were characterized by single-crystal and powder X-ray diffraction, IR spectroscopy, TGA, SEM/EDX, SAXS and ICP analysis. The solution stability of compounds 1–4 was also assessed by 29Si and 183W NMR.

Graphical abstract: Bottom-up synthesis of functionalized {Ce4(SiW9O34)2(l)2} polyoxometalates

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Publication details

The article was received on 28 Aug 2018, accepted on 10 Oct 2018 and first published on 11 Oct 2018


Article type: Paper
DOI: 10.1039/C8CE01447G
Citation: CrystEngComm, 2018,20, 7144-7155
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    Bottom-up synthesis of functionalized {Ce4(SiW9O34)2(L)2} polyoxometalates

    M. Dufaye, S. Duval, K. Nursiah, G. Stoclet, X. Trivelli and T. Loiseau, CrystEngComm, 2018, 20, 7144
    DOI: 10.1039/C8CE01447G

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