2H NMR Study of Hydrogen Bonding in Deuterated Kaolinite

Shigenobu Hayashi1, 2, Etsuo Akiba1, Ritsuro Miyawaki3 and Shinji Tomura3
1 National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan
2 Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
3 National Industrial Research Institute of Nagoya, Kita-ku, Nagoya 462, Japan

Abstract: 2H NMR spectra of synthetic deuterated kaolinite have been collected in the temperature range from 150 K to 350 K. Hydroxyl groups show a Pake doublet pattern with an asymmetry factor of 0. They are almost fixed spatially, and undergo a wobbling motion with increasing temperature. The quadrupole coupling constant is 273 ± 3 kHz at 150 K, which indicates that interlayer hydrogen bonding is relatively weak.

Key Words: 2H NMR • Kaolinite • Hydrogen bond

Clays and Clay Minerals; October 1994 v. 42; no. 5; p. 561-566; DOI: 10.1346/CCMN.1994.0420507
© 1994, The Clay Minerals Society
Clay Minerals Society (www.clays.org)