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²³Na NMR spectra of Na-K form low silica X zeolite loaded with potassium for saturating level, which corresponds to 9.0 atoms per unit, have been observed. Other than a centered grain of the spectral component, another separated peak component with shift of somewhat larger than bulk Na has been detected. Such the extra peak component shows complex hysteresis on temperature and is accompanied with quite slow dynamics of days-order. It is attributed to atomic re-configurations among sites occurs in the course of melting and re-crystallization process among alloy of sodium and potassium, which possibly is formed on surface or outside of the zeolite crystals.

権利情報:

• In Copyright
  This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1007/s10751-024-02040-7

キーワード: Zeolite, NMR, Knight shift, Sodium-potassium alloy, 23Na

刊行年月日: 2024-08-06

出版者: Springer Science and Business Media LLC

掲載誌:

• Interactions (ISSN: 30050731) vol. 245 196

研究助成金:

• JSPS KAKENHI JP15540353
• MEXT KAKENHI G JP19051009

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4786

公開URL: https://doi.org/10.1007/s10751-024-02040-7

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更新時刻: 2025-08-06 08:30:33 +0900

MDRでの公開時刻: 2025-08-06 08:19:51 +0900