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• W2891578894 abstract "A series of organic–inorganic hybrid lacunary Keggin silicotungstate 3d-4f heterometallic derivatives, {[Cu (en)2]1.5Ln[(α-SiW11O39)2]}220– [Ln = GdIII for 1, TbIII for 2, DyIII for 3, ErIII for 4, LuIII for 5], {[Cu(en)2]1.5Ln[(α-SiW11O39)]}2– [Ln = LaIII for 6, CeIII, for 7] and {[Cu(en)2(H2O)][Cu(en)2]nLn[(α-SiW11O39)2]}m− [(Ln, n, m) = (PrIII, 2, 7) for 8, (SmIII, 3, 5) for 9] (en = ethylenediamine) have been successfully synthesized under hydrothermal conditions and further characterized by elemental analyses, inductively coupled plasma atomic emission spectrometry (ICP-AES) analyses, X-ray powder diffraction (XRPD), IR spectra, thermogravimetric (TG) analyses, and single-crystal X-ray diffraction. The common features of 1–5 and 8–9 are that they all consist of a sandwich-type [Ln(α-SiW11O39)2]13– polyoxoanion, whereas both 6 and 7 consist of the unusual 1:1 [Ln(α-SiW11O39)]5– units and [Cu(en)2]2+ coordination cations. 1–5 show dimeric structures, and 6–9 display unprecedented three-dimensional (3D) frameworks, representing the first 3D 3d-4f heterometallic silicotungstates. The features of 6 and 7 are that the components are closely packed along the 21 screw axis to generate scarce 5-connected network structures with the Schläfli symbol of (48·62), while 8 and 9 exhibit the 4-connected (66) topology and 6-connected (48·54·63) topology structures, respectively. Furthermore, 2, 3, and 9 manifest apparent fluorescence signals, which can be assigned to the characteristic emissions of TbIII, DyIII, and SmIII cations, respectively." @default.
• W2891578894 created "2018-09-27" @default.
• W2891578894 creator A5033616215 @default.
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• W2891578894 date "2012-02-10" @default.
• W2891578894 modified "2023-09-27" @default.
• W2891578894 title "Organic–Inorganic Hybrids Based on Monovacant Keggin-type Silicotungstates and 3d-4f Heterometals" @default.
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• W2891578894 doi "https://doi.org/10.1021/cg2012759" @default.
• W2891578894 hasPublicationYear "2012" @default.
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