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Bottom-up synthesis of functionalized {Ce4(SiW9O34)2(L)2} polyoxometalates


The reaction of Na10[SiW9O34] with the 4f tetravalent cerium cation associated to four different organic O/N-donor ligands at pH = 4 - 4.5 gives rise to the formation of five anionic polyoxometalates [Ce4(3-O)2(SiW9O34)2(C4H5O4)2]10- (1), [Ce4(3-O)2(SiW9O34)2(C5H7O4)2]10- (2), [Ce4(3-O)2(SiW9O34)2(C5H9O2-NH3)2]8- (3), [Ce4(3-O)2(SiW9O34)2(C6H10O2-NH3)2]8- (4) and [(Ce3(3-O)(2-OH)3)(Ce6(3-O)4(3-OH)4)(SiW9O34)4]21- (5). Compounds 1-4 consist of one tetranuclear Ce-based cluster fragment stabilized by two [SiW9O34]10- polyanion and two organic linkers. Compound 5 is constituted by a hexanuclear core combined to 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. Compounds 1-4 solution stability was also assessed by 29Si and 183W NMR.

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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, Accepted Manuscript
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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, Accepted Manuscript , DOI: 10.1039/C8CE01447G

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