多金属氧酸盐
钨酸盐
产量(工程)
钨酸钠
离子
水溶液
磷酸盐
核化学
碱金属
四甲基铵
化学
无机化学
衍生工具(金融)
材料科学
结晶学
钨
物理化学
有机化学
催化作用
经济
冶金
金融经济学
作者
Akio Hayashi,Terufumi Haioka,Keita Takahashi,Bassem S. Bassil,Ulrich Kortz,Tsuneji Sano,Masahiro Sadakane
标识
DOI:10.1002/zaac.201500679
摘要
Abstract The effect of cations in a reaction mixture for the preparation of the Preyssler‐Jeannin‐Pope type 30‐tungsto‐5‐phosphate [P 5 W 30 O 110 Na] 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, [P 2 W 18 O 62 ] 6– . Amongst all the alkali cations, only Na + allows formation of the Preyssler‐type polyanion [P 5 W 30 O 110 Na] 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 [P 2 W 18 O 62 ] 6– , whereas K + , Rb + , and Cs + selectively result in the Keggin‐type polyanion [PW 12 O 40 ] 3– . An improved synthetic procedure for the Na + ‐encapsulated Preyssler‐ion leading to a higher isolated yield is presented. Furthermore, addition of Ca 2+ and Bi 3+ compounds allows formation of the Ca 2+ ‐ and Bi 3+ ‐encapsulated Preyssler‐type polyanions, [P 5 W 30 O 110 Ca] 13– and [P 5 W 30 O 110 Bi] 12– , respectively. Furthermore, single‐crystal XRD structure of the Bi 3+ ‐encapsulated Preyssler‐type polyanions, [P 5 W 30 O 110 Bi] 12– , is presented for the first time.
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