Synthesis and characterization of a new three-dimensional aluminophosphate [Al₁₁P₁₂O₄₈][C₄H₁₂N ₂][C₄H₁₁N₂] with an Al/P ratio of 11: 12

Employing piperazine as a template, a new three-dimensional aluminophosphate [Al₁₁P₁₂O₄₈][C₄H₁₂N ₂] (denoted AlPO-CJ11) has been prepared hydrothermally. The as-synthesized product has been characterized by X-ray powder diffraction, inductively coupled plasma, thermogravimetric and differential thermal analyses. Single crystal X-ray diffraction analysis shows that AlPO-CJ11 crystallizes in the trigonal space group R3̄c (no. 167) with a = 14.045(2) Å, c = 42.091(6) Å, V = 7191.0(16) ų, and Z = 6. The framework structure of AlPO-CJ11 is constructed from two new types of chiral cage and has a new stoichiometry with an Al/P ratio of 11 : 12. The possible locations of the templates in the cages have been investigated by molecular modeling.