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- Title
Selective Rb<sup>+</sup> vs. K<sup>+</sup> Guest Incorporation in Wheel‐Shaped 27‐Tungsto‐3‐Arsenate(III) Host, [M⊂{(β‐As<sup>III</sup>W<sub>8</sub>O<sub>30</sub>)(WO(H<sub>2</sub>O))}<sub>3</sub>]<sup>14–</sup> (M = K, Rb)
- Authors
Kandasamy, Balamurugan; Sudmeier, Tim; Ayass, Wassim W.; Lin, Zhengguo; Feng, Qianyu; Bassil, Bassem S.; Kortz, Ulrich
- Abstract
The wheel‐shaped, potassium‐templated 27‐tungsto‐3‐arsenate(III) [K⊂{(β‐AsIIIW8O30)(WO(H2O))}3]14– (1) was synthesized by simple one‐pot condensation of the trilacunary [B‐α‐AsIIIW9O33]9– precursor in aqueous, acidic KCl solution. Polyanion 1 comprises three β‐{AsW8O30} units linked via three trans‐{WO(H2O)} groups, forming a cyclic assembly with a potassium ion located in the central cavity. The rubidium‐analogue [Rb⊂{(β‐AsIIIW8O30)(WO(H2O))}3]14– (2) could also be prepared, by addition of a small amount of Rb+ ions to a solution containing a large excess of K+ ions. This indicates that the rigid [{(β‐AsIIIW8O30)(WO(H2O))}3]15– (As3W27) host exhibits high selectivity for Rb+ ion guests compared to K+ ions. Polyanions 1 and 2 were characterized in the solid state by single‐crystal XRD, FT‐IR, TGA, and elemental analysis. We have prepared a trimeric, wheel‐shaped 27‐tungsto‐3‐arsenate(III) host, M⊂As3W27 (M = Rb, K), which exhibits high selectivity for Rb+ ions, in analogy to organic crown ethers.
- Subjects
TUNGSTEN compounds synthesis; ARSENATES; RUBIDIUM ions; POTASSIUM ions; CHEMICAL precursors; SOLUTION (Chemistry)
- Publication
European Journal of Inorganic Chemistry, 2019, Vol 2019, Issue 3/4, p502
- ISSN
1434-1948
- Publication type
Article
- DOI
10.1002/ejic.201800788