Intercalation of Quaternary Ammonium Ions into γ-Titanium Phosphate

Abstract

Abstract The intercalation of alkyltrimethylammonium ions into γ-titanium phosphate, Ti(HPO4)2·2H2O (γ-TiP), was investigated to clarify the mechanism of intercalation of quaternary ammonium ions into the layered phosphate. Alkyltrimethylammonium ions with short alkyl chains (the number of carbon atoms, n = 6 to 10) were scarcely intercalated into γ-TiP, while those with long alkyl chains (n = 12 to 18) were easily intercalated and formed a monolayer in the interlayer region, in which the alkyl chains inclined at 57.4° to the γ-TiP layers. The increase of the number of carbon atoms in alkyl chains and the volume of the solvent in the reaction solution led to the increase of the uptakes of quaternary ammonium ions. Based on these results, some bactericides with quaternary ammonium ion structure were then intercalated into γ-TiP, and the products obtained were stable to heat.