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ID 46761
本文ファイル
著者
Hayashi, Akio
Nur Khoiru Wihadi, Muh
Ota, Hiromi
Xavier, López
Ichihashi, Katsuya
Inoue, Katsuya 大学院理学研究科 広大研究者総覧
Tsunoji, Nao 大学院工学研究科 広大研究者総覧
Sano, Tsuneji 大学院工学研究科
Sadakane, Masahiro 大学院工学研究科 広大研究者総覧
抄録(英)
A mono-potassium cation-encapsulated Preyssler-type phosphotungstate, [P5W30O110K]14− (1), was prepared as a potassium salt, K14[P5W30O110K] (1a), by heating mono-bismuth- or mono-calcium-encapsulat ed Prey ssler-type p hosphot ungstates (K12[P5W30O110Bi(H2O)] or K13[P5W30O110Ca(H2O)]) in acetate buffer. Characterization of the potassium salt 1a by single-crystal X-ray structure analysis, 31P and 183W nuclear magnetic resonance (NMR) spectroscopy, Fourier transform infrared spectroscopy, high-resolution electrospray ionization mass spectroscopy, and elemental analysis revealed that one potassium cation is encapsulated in the central cavity of the Preyssler-type phosphotungstate molecule with a formal D5h symmetry. Density functional theory calculations have confirmed that the potassium cation prefers the central position of the cavity over a side position, in which no water molecules are coordinated to the encapsulated potassium cation. 31P NMR and cyclic voltammetry analyses revealed the rapid protonation−deprotonation of the oxygens in the cavity compared to that of other Preyssler-type compounds. Heating of 1a in the solid state afforded a di-K+-encapsulated compound, K13[P5W30O110K2](2a), indicating that a potassium counter-cation is introduced in one of the side cavities, concomitantly displacing the internal potassium ion from the center to a second side cavity, thus providing a new method to encapsulate an additional cation in Preyssler compounds.
内容記述
M.S. is grateful for the A-STEP program of the Japanese Science and Technology Agency (JST), and Furukawa Foundation for the Promotion of Technology. X.L. thanks the Spanish Ministry of Science and Innovation (MICINN) (project CTQ2011-29054-C02-01/BQU), the DGR of the Generalitat de Catalunya (grant no. 2014SGR199), and the XRQTC. This work was also supported by the Center for Functional Nano Oxide at Hiroshima University. M.N.K.W. thanks the Indonesian Endowment Fund for Education (LPDP), Ministry of Finance, Republik Indonesia, for a Ph.D. scholarship.
掲載誌名
ACS Omega
3巻
2号
開始ページ
2363
終了ページ
2373
出版年月日
2018-02-27
出版者
American Chemical Society
ISSN
2470-1343
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
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権利情報
Copyright © 2018 American Chemical Society, This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
関連情報URL
部局名
理学研究科
工学研究科