Details

Autor(en) / Beteiligte

• Hayashi, Akio
• Haioka, Terufumi
• Takahashi, Keita
• Bassil, Bassem S.
• Kortz, Ulrich
• Sano, Tsuneji
• Sadakane, Masahiro

Titel

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

Ist Teil von

• Zeitschrift für anorganische und allgemeine Chemie (1950), 2015-12, Vol.641 (15), p.2670-2676

Ort / Verlag

Weinheim: WILEY-VCH Verlag

Erscheinungsjahr

2015

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.