Synthesis and crystal structure of a new layered aluminophosphate [Al3P4O16][C6N3H17][H3O]

摘要

A new layered aluminophosphate denoted AlPO-AEPP has been synthesized under hydrothermal conditions using N-(2-aminoethyl)-piperazine (AEPP) as structure directing molecule. The compound, with the empirical formula [Al3P4O16][C6N3H17][H3O] crystallizes in the orthorhombic space group P2(1)2(1)2(1) (No. 19) with a = 14.550(8) Angstrom, b = 16.163(8) Angstrom, c = 18.677(9) Angstrom, Z = 4, R-1 = 0.0253 and wR(2) = 0.0644. Inorganic sheets contain a 4 x 6 network previously found in a layered compound synthesized with 1,2-dimethylimidazole molecules. Layers stack in the ABAB sequence and are held together by doubly protonated organic molecules and H3O+ cations. AlPO-AEPP represents the second example of layered aluminophosphate for which protonated water acts as a co-template along with organic molecules. (C) 2004 Elsevier Inc. All rights reserved.