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Assembly of Cerium(III)‐Stabilized Polyoxotungstate Nanoclusters with SeO 3 2− /TeO 3 2− Templates: From Single Polyoxoanions to Inorganic Hollow Spheres in Dilute Solution
Author(s) -
Chen WeiChao,
Li HaoLong,
Wang XinLong,
Shao KuiZhan,
Su ZhongMin,
Wang EnBo
Publication year - 2013
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201300615
Subject(s) - cerium , x ray photoelectron spectroscopy , nanoclusters , polyoxometalate , crystallography , spectroscopy , photoluminescence , materials science , tellurium , nuclear chemistry , single crystal , analytical chemistry (journal) , chemistry , inorganic chemistry , nanotechnology , catalysis , organic chemistry , nuclear magnetic resonance , physics , optoelectronics , quantum mechanics
A versatile one‐pot strategy was employed to synthesize three cerium(III)‐stabilized polyoxotungstates nanoclusters by combining cerium linkers and SeO 3 2− /TeO 3 2− heteroanion templates: K 32 Na 16 [{(XO 3 )W 10 O 34 } 8 {Ce 8 (H 2 O) 20 }(WO 2 ) 4 ‐ (W 4 O 12 )] ⋅ n H 2 O [X=Se, n =81 ( 1 ); X=Te, n =114 ( 2 )] and K 12 Na 22 [{(SeO 3 )W 10 O 34 } 8 {Ce 8 (H 2 O) 20 }(WO 2 ) 4 ‐ {(W 4 O 6 )Ce 4 (H 2 O) 14 (SeO 3 ) 4 (NO 3 ) 2 }] ⋅ 79 H 2 O ( 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.