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|Title:||Cation Effect on Formation of Preyssler-type 30-Tungsto-5-phosphate : Enhanced Yield of Na-encapsulated Derivative and Direct Synthesis of Ca- and Bi-Encapsulated Derivatives||Authors:||Hayashi, A
Haioka , T
Sano , T
|Affiliations:||Department of Chemistry||Issue Date:||2015||Part of:||journal of anorganische und allgemeine Chemie||Volume:||641||Issue:||15||Start page:||2670||End page:||2676||Abstract:||
The effect of cations in a reaction mixture for the preparation of the Preyssler-Jeannin-Pope type 30-tungsto-5-phosphate [P5W30O110Na]14– is investigated. Reaction of phosphate and tungstate with a P/W ratio of ca. 3.9 in an acidic aqueous solution without cations selectively leads to the Dawson-type 18-tungsto-2-phosphate, [P2W18O62]6–. Amongst all the alkali cations, only Na+ allows formation of the Preyssler-type polyanion [P5W30O110Na]14–, with an encapsulated Na+ ion, and the product yield can be improved by increasing Na+ amount. The presence of Li+ ions instead results in the Dawson-type polyanion [P2W18O62]6–, whereas K+, Rb+, and Cs+ selectively result in the Keggin-type polyanion [PW12O40]3–. An improved synthetic procedure for the Na+-encapsulated Preyssler-ion leading to a higher isolated yield is presented. Furthermore, addition of Ca2+ and Bi3+ compounds allows formation of the Ca2+- and Bi3+-encapsulated Preyssler-type polyanions, [P5W30O110Ca]13– and [P5W30O110Bi]12–, respectively. Furthermore, single-crystal XRD structure of the Bi3+-encapsulated Preyssler-type polyanions, [P5W30O110Bi]12–, is presented for the first time.
|URI:||https://scholarhub.balamand.edu.lb/handle/uob/1718||DOI:||10.1002/zaac.201500679||Ezproxy URL:||Link to full text||Type:||Journal Article|
|Appears in Collections:||Department of Chemistry|
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