Quick Search:

uzh logo
Browse by:

Zurich Open Repository and Archive

Maintenance: Tuesday, July the 26th 2016, 07:00-10:00

ZORA's new graphical user interface will be relaunched (For further infos watch out slideshow ZORA: Neues Look & Feel). There will be short interrupts on ZORA Service between 07:00am and 10:00 am. Please be patient.

Ni, L; Hussain, F; Spingler, B; Weyeneth, S; Patzke, G R (2011). Lanthanoid-containing open wells–Dawson silicotungstates: Synthesis, crystal structures, and properties. Inorganic Chemistry, 50(11):4944-4955.

Full text not available from this repository.

View at publisher


Five novel lanthanoid-containing silicotungstates with polymeric crystal structures [Ln2(H2O)7Si2W18O66]n10n– [Ln = GdIII (Gd-1 and Gd-2), TbIII, HoIII] and [Dy2(H2O)6.5(C2H4O2)0.5Si2W18O66]n10n– were obtained from the one-step reaction of Na10[SiW9O34]·nH2O with Ln(NO3)3·nH2O in a sodium acetate buffer. The compounds were characterized by single-crystal X-ray diffraction and a wide range of analytical methods, including FT-IR, UV/vis, and photoluminescence spectroscopy as well as electrochemistry and thermogravimetric analysis. This new polyoxotungstate series is the first example of lanthanoids embedded in the open Wells–Dawson silicotungstate anion [α-Si2W18O66]16–. The lanthanoid-containing Wells–Dawson-type polyoxoanions [Ln2(H2O)7Si2W18O66]10– [Ln = GdIII (Gd-1 and Gd-2), TbIII, HoIII] and [Dy2(H2O)6.5(C2H4O2)0.5Si2W18O66]10– are linked by Ln3+ cations to form 3D architectures for Gd-1 or 2D frameworks for the isostructural compounds Tb-2, Dy-2, Ho-2, and Gd-2. The structure-directing influence of the lanthanoid cation on the local structure of the dimeric building blocks and on the crystal packing motifs is investigated in detail. The photoluminescence properties of Tb-2 and Dy-2 were investigated at room temperature, and Ho-2 exhibits an interesting photochromic behavior. The magnetic susceptibility of Gd-1 and Gd-2 was studied in the temperature range between 2 and 300 K for its effective magnetic moment.


26 citations in Web of Science®
29 citations in Scopus®
Google Scholar™


Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
540 Chemistry
Deposited On:14 Jan 2012 20:29
Last Modified:05 Apr 2016 15:22
Publisher:American Chemical Society
Publisher DOI:10.1021/ic2001943

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page