Kaolinite-Pyridine Intercalation Compound derived from Hydrated Kaolinite

Yoshiyuki Sugahara, Shigeo Satokawa, Ken-Ichi Yoshioka, Kazuyuki Kuroda and Chuzo Kato
Department of Applied Chemistry, School of Science and Engineering, Waseda University, Ohkubo, Shinjuku-ku, Tokyo 160, Japan

Abstract: A kaolinite-pyridine intercalation compound was prepared using hydrated kaolinite as an intermediate. Hydrated kaolinite having a basal spacing of 10 Å was treated with pyridine to form a well-ordered intercalation compound having a basal spacing of 12.0 Å. Infrared spectroscopy indicated the presence of hydrogen bonding between the hydroxyls of the kaolinite and the pyridine. 29Si nuclear magnetic resonance spectroscopy with cross polarization and magic-angle spinning revealed that intercalated pyridine affected the environment of silicon. The mono-substituted pyridine derivatives were also intercalated with hydrated kaolinite. On the basis of the basal spacings of the intercalation compounds and the stabilities of the derivatives between the layers, the pyridine appeared to be in an approximately perpendicular position, with the nitrogen facing the gibbsitic sheets.

Key Words: Hydrated kaolinite • Infrared spectroscopy • Intercalation • Kaolinite • Nuclear magnetic resonance • Pyridine • X-ray powder diffraction

Clays and Clay Minerals; April 1989 v. 37; no. 2; p. 143-150; DOI: 10.1346/CCMN.1989.0370205
© 1989, The Clay Minerals Society
Clay Minerals Society (www.clays.org)