Solid-State Intercalation of Naphthalene and Anthracene into Alkylammonium-Montmorillonites

Makoto Ogawa, Hidenori Shirai, Kazuyuki Kuroda and Chuzo Kato
Department of Applied Chemistry, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo 169, Japan

Abstract: Intercalation of naphthalene and anthracene into alkyltrimethylammonium (CnH2n+1(CH3)3N+; n = 8, 12, 14, 16, and 18)-montmorillonites was carried out by novel solid-solid reactions at room temperature. Octyltrimethylammonium(C8)-montmorillonite did not form an intercalation compound with either naphthalene or anthracene. Naphthalene was intercalated into both dodecyltrimethylammonium(C12)- and octadecyltrimethylammonium(C18)-montmorillonites to give intercalation compounds. On the other hand, the solid-solid reaction between dodecyltrimethylammonium(C12)- or tetradecyltrimethylammonium(C14)-montmorillonite and anthracene gave only partly intercalated compounds while hexadecyltrimethylammonium(C16)- and octadecyltrimethylammonium(C18)-montmorillonites gave single phase intercalation compounds. The hydrophobic interactions between alkylammonium-montmorillonites and the aromatic compounds are thought to be the driving force for the solid-state intercalation. The extent of the increase in the basal spacing may also be involved in the different reactivity.

Key Words: Alkylammonium-montmorillonites • Anthracene • Intercalation • Naphthalene • Solid-state intercalation

Clays and Clay Minerals; October 1992 v. 40; no. 5; p. 485-490; DOI: 10.1346/CCMN.1992.0400501
© 1992, The Clay Minerals Society
Clay Minerals Society (www.clays.org)