title: Assembly of large purely inorganic Ce-stabilized/bridged selenotungstates: from nanoclusters to layers.
abstract: A versatile one-pot strategy was used to synthesize two large, purely inorganic selenotungstates, nanocluster K(6)Na(16) [Ce(6)Se(6)W(67)O(230) (OH)(6) (H(2)O)(17)]⋅47 H(2)O (1) and layer K(9)Na(5) Ce(H(2)O)(4) [Ce(6)Se(10)W(51)O(187) (OH)(7) (H(2)O)(18)]⋅45H(2)O(2), by combining cerium centers and SeO(3) (2-) heteroanion templates. Compound 1 displays a Ce-stabilized hexameric nanocluster with one rhombus-like {W(4)O(15) (OH)(3)} unit in the center, whereas compound 2 is the first example of a Ce-bridged layer selenotungstate network based on linkage of the unusual {Ce(6)Se(10)W(51)O(187) (OH)(7) (H(2)O)(18)} clusters and additional Ce(H(2)O)(4) fragments via Ce-O-Se bridges. The compounds were characterized by elemental analyses, IR spectroscopy, thermogravimetric analyses, powder and single-crystal X-ray diffraction, and electrospray ionization mass spectrometry. Moreover, the electrochemical property of compound 1 was also investigated.
authors: 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).
authors: Wei-Chao
authors: WC
authors: Chen
authors: Chao
authors: C
authors: Qin
authors: Yang-Guang
authors: YG
authors: Li
authors: Hong-Ying
authors: HY
authors: Zang
authors: Kui-Zhan
authors: KZ
authors: Shao
authors: Zhong-Min
authors: ZM
authors: Su
authors: En-Bo
authors: EB
authors: Wang
keywords: cerium; layers; nanoclusters; polyoxometalates; template synthesis