Synthesis and crystal structure of ULM-6, a new open-framework fluorinated aluminium phosphate with encapsulated 1,3-diaminopropane: [N2C3H12]2+[Al4(PO4)4F2(H2O)]2–

Abstract

The compound [N₂C₃H₁₂]²⁺[Al₄(PO₄)₄F₂(H₂O)]^2– or ULM-6, a new fluorinated aluminium phosphate, has been obtained by hydrothermal synthesis at 180 °C for 14 d with 1,3-diaminopropane as a structure-directing agent. The gallium form of ULM-6 was also obtained. The structure of the aluminium compound was characterized by means of single-crystal X-ray diffraction analysis. It consists of the alternation of corner-linked PO₄ tetrahedra with AlO₄(H₂O), AlO₄F trigonal bipyramids and AlO₄F₂ octahedra. The connection of these building units generates 8-ring channels running along [100] and [010] in which the diprotonated diamine is located. Crystal data: triclinic, space group P (no. 2), Z = 1, a = 9.5581(3), b = 9.7661(3), c = 10.4724(3) Å, α = 68.370(1), β = 80.509(1), γ = 89.506(1)°, V = 894.82(5) ų, R1(F) = 0.0556, wR2(F ²) = 0.1516 for 3827 reflections with I > 2σ(I).