Synthesis of a new microporous gallophosphate obtained by in situ generation of cyclohexylamine

A novel gallophosphate [Ga13(PO4)18(C6H14N)13(C6H13N)
- 2H3O+
- 3H2O] was synthesized using cyclohexylformamide as main solvent. The structure-directing agent is the cyclohexylamine which is generated in situ by thermal decomposition of the solvent. The structure was solved by single-crystal X-ray diffraction (space group P-3, a=16.605(14)Å, c=17.22(2)Å, Z=1, V=4112(6)Å3). The 2D structure of Mu-30 is built up from (4,6) layers constituted of PO4 tetrahedra sharing three of their oxygen atoms with one GaO6 octahedron and two GaO4 tetrahedra. Monoprotonated cyclohexylamine, water molecules and H3O+ ion are intercalated between the layers. Characterizations of this new gallophosphate by bulk chemical analysis, scanning electron microscopy, thermal analysis, and 13C and 31P solid state NMR spectroscopies are also reported.