Assembly of cerium(III)-stabilized polyoxotungstate nanoclusters with SeO3(2-)/TeO3(2-) templates: from single polyoxoanions to inorganic hollow spheres in dilute solution

Wei-Chao Chen; Hao-Long Li; Xin-Long Wang; Kui-Zhan Shao; Zhong-Min Su; En-Bo Wang

doi:10.1002/chem.201300615

Assembly of cerium(III)-stabilized polyoxotungstate nanoclusters with SeO3(2-)/TeO3(2-) templates: from single polyoxoanions to inorganic hollow spheres in dilute solution

Chemistry. 2013 Aug 12;19(33):11007-15. doi: 10.1002/chem.201300615. Epub 2013 Jun 21.

Authors

Wei-Chao Chen¹, Hao-Long Li, Xin-Long Wang, Kui-Zhan Shao, Zhong-Min Su, En-Bo Wang

Affiliation

¹ Institute of Functional Materials Chemistry, Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Changchun 130024, P. R. China.

PMID: 23794258
DOI: 10.1002/chem.201300615

Abstract

A versatile one-pot strategy was employed to synthesize three cerium(III)-stabilized polyoxotungstates nanoclusters by combining cerium linkers and SeO3(2-)/TeO3(2-) heteroanion templates: K32Na16[{(XO3)W10O34}8{Ce8(H2O)20}(WO2)4(W4O12)]·nH2O [X=Se, n=81 (1); X=Te, n=114 (2)] and K12Na22[{(SeO3)W10O34}8{Ce8(H2O)20}(WO2)4{(W4O6)Ce4(H2O)14(SeO3)4(NO3)2}]· 79H2O (3), which are the first lanthanide-containing polyoxotungstates with selenium or tellurium heteroatoms. The three clusters were characterized by single-crystal X-ray structure analysis, IR spectroscopy, thermogravimetric/differential thermal analysis, UV/Vis spectroscopy, ESI-MS, and X-ray photoelectron spectroscopy. Their electrochemical, photoluminescence, and magnetic properties were investigated. Their behavior in solution was studied by transmission electron microscopy, which showed that their single polyoxoanions assemble into intact, uniform-sized, purely inorganic hollow spheres in dilute water/acetone solution.

Keywords: cerium; nanostructures; polyoxometalates; self-assembly; template synthesis.