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April 2, 2020
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Preparation of Preyssler-type Phosphotungstate with One Central Potassium Cation and Potassium Cation Migration into the Preyssler Molecule to form Di-Potassium-Encapsulated Derivative

Publicated to:Acs Omega. 3 (2): 2363-2373 - 2018-02-28 3(2), DOI: 10.1021/acsomega.8b00163

Authors: Hayashi, Akio; Wihadi, Muh Nur Khoiru; Ota, Hiromi; Lopez, Xavier; Ichihashi, Katsuya; Nishihara, Sadafumi; Inoue, Katsuya; Tsunoji, Nao; Sano, Tsuneji; Sadakane, Masahiro

Affiliations

Hiroshima Univ, Chiral Res Ctr, 1-3-1 Kagamiyama, Higashihiroshima 7398526, Japan - Author
Hiroshima Univ, Grad Sch Engn, Dept Appl Chem, 1-4-1 Kagamiyama, Higashihiroshima 7398527, Japan - Author
Hiroshima Univ, Grad Sch Sci, 1-3-1 Kagamiyama, Higashihiroshima 7398526, Japan - Author
Hiroshima Univ, Inst Adv Mat Res, 1-3-1 Kagamiyama, Higashihiroshima 7398526, Japan - Author
Okayama Univ, Div Instrumental Anal, Dept Instrumental Anal & Cryogen, Adv Sci Res Ctr,Kita Ku, 3-1-1 Tsushima Naka, Okayama 7008530, Japan - Author
Univ Rovira & Virgili, Dept Quim Fis & Inorgan, C Marcel Li Domingo 1, E-43007 Tarragona, Spain - Author
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Abstract

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-encapsulated Preyssler-type phosphotungstates (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.

Keywords

Computational chemistryInorganic chemistryPolyoxometalate

Quality index

Bibliometric impact. Analysis of the contribution and dissemination channel

The work has been published in the journal Acs Omega due to its progression and the good impact it has achieved in recent years, according to the agency Scopus (SJR), it has become a reference in its field. In the year of publication of the work, 2018, it was in position , thus managing to position itself as a Q1 (Primer Cuartil), in the category Chemical Engineering (Miscellaneous).

From a relative perspective, and based on the normalized impact indicator calculated from the Field Citation Ratio (FCR) of the Dimensions source, it yields a value of: 2.16, which indicates that, compared to works in the same discipline and in the same year of publication, it ranks as a work cited above average. (source consulted: Dimensions Jul 2025)

Specifically, and according to different indexing agencies, this work has accumulated citations as of 2025-07-22, the following number of citations:

  • WoS: 18
  • Scopus: 21
  • Europe PMC: 4

Impact and social visibility

From the perspective of influence or social adoption, and based on metrics associated with mentions and interactions provided by agencies specializing in calculating the so-called "Alternative or Social Metrics," we can highlight as of 2025-07-22:

  • The use, from an academic perspective evidenced by the Altmetric agency indicator referring to aggregations made by the personal bibliographic manager Mendeley, gives us a total of: 14.
  • The use of this contribution in bookmarks, code forks, additions to favorite lists for recurrent reading, as well as general views, indicates that someone is using the publication as a basis for their current work. This may be a notable indicator of future more formal and academic citations. This claim is supported by the result of the "Capture" indicator, which yields a total of: 16 (PlumX).

With a more dissemination-oriented intent and targeting more general audiences, we can observe other more global scores such as:

  • The Total Score from Altmetric: 3.25.
  • The number of mentions on the social network Facebook: 1 (Altmetric).

It is essential to present evidence supporting full alignment with institutional principles and guidelines on Open Science and the Conservation and Dissemination of Intellectual Heritage. A clear example of this is:

  • The work has been submitted to a journal whose editorial policy allows open Open Access publication.
  • Assignment of a Handle/URN as an identifier within the deposit in the Institutional Repository: http://hdl.handle.net/20.500.11797/imarina5131985

Leadership analysis of institutional authors

This work has been carried out with international collaboration, specifically with researchers from: Japan.