Intercalation of n-Alkylamines into γ-Zirconium Phosphate Phosphite

γ-Zirconium phosphate phosphite (γ-ZrPP) was prepared by refluxing γ-zirconium phosphate in 0.1mol⋅dm-3 phosphorous acid according to Alberti's method. Nine n-alkylamines (C3-C14) were employed as guest molecules to intercalate into γ-ZrPP at 25°C. The interlayer distances (d) were plotted vs. the number of carbon atoms (Nc) in each amine molecule, giving a straight line with an equation d=1.32Nc+12.2 (A) . It is suggested that the guest molecules are taken up in a monolayer, and each molecule is arranged almost perpendicular to the layer plane of γ-ZrPP.