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  • Title: Inorganic crown ethers: sulfate-based Preyssler polyoxometalates.
    Author: Zhang ZM, Yao S, Li YG, Han XB, Su ZM, Wang ZS, Wang EB.
    Journal: Chemistry; 2012 Jul 23; 18(30):9184-8. PubMed ID: 22736581.
    Abstract:
    A tungsten crown: The {SO(4)} units were introduced into the {W(30)} crown, resulting in a new Preyssler polyoxoanion {S(5)W(30)} with position-specific, guest, K(+) or Na(+) ions in its geometrical center. The as-prepared polyoxoanion exhibits an interesting ion-selective encapsulation of K(+) and Na(+) (see figure).
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