A novel approach to characterization of a relatively unstable intercalation compound under ambient conditions: Revisiting a kaolinite-acetone intercalation compound

Shingo Machida, Régis Guégan, Yoshiyuki Sugahara*

*この研究の対応する著者

研究成果: Article査読

抄録

Characteristics of a kaolinite-acetone intercalation compound prepared using a kaolinite N-methylformamide intercalation compound (Kaol-NMF) as an intermediate were obtained by a set of techniques with attention to suppressing evaporation and deintercalation of acetone. X-ray diffraction (XRD) with spectroscopic analyses, Fourier-transform infrared spectroscopy (FTIR) accompanied by solid-state 13C and 29Si nuclear magnetic resonance (NMR) spectroscopy with cross polarization (CP) and magic angle spinning (MAS) enable us to demonstrate full replacement of a pre-intercalated NMF monolayer with an acetone monolayer between the layers of kaolinite with an increase in the basal spacing from 1.08 nm (Kaol-NMF) to 1.12 nm. In addition, the appearance of an additional OH stretching band at 3630 cm-1 and the shift of the CO stretching band to a lower wavenumber, from 1714 to 1701 cm-1, in the FTIR spectrum, along with a downfield shift of the signal due to CO groups from 209 ppm, where a singlet was observed in the liquid-state 13C NMR spectrum of acetone in CDCl3, to 219 ppm in the 13C CP/MAS NMR spectrum, indicate hydrogen bond formation between interlayer hydroxyl groups of kaolinite and CO groups of the intercalated acetone molecules. These careful characterization studies provide information on an interaction between kaolinite and acetone under ambient conditions.

本文言語English
ページ(範囲)6290-6296
ページ数7
ジャーナルDalton Transactions
50
18
DOI
出版ステータスPublished - 2021 5 14

ASJC Scopus subject areas

  • 無機化学

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