Synthesis and characterization of two aluminophosphates templated by N-methyl-1,3-diaminopropane
Résumé
Two cryst. aluminophosphates were synthesized under hydrothermal conditions using N-methyl-1,3-diaminopropane (MeDAP) as structure-directing mol. The 1st one, denoted MDAP-1, is obsd. as an intermediate phase during the crystn. of the final product MDAP-2. The structure of MDAP-1, a 2-dimensional-layered compd. with the empirical formula (C4H14N2)1.5[Al3P4O16], was refined using powder x-ray diffraction data. It crystallizes in the monoclinic space group P21/c with a 14.080(10), b 8.4763(1), c 18.9954(1) .ANG., beta 100.95(5)° and Z = 4. Inorg. sheets contain a novel 4*6 net, constructed from capped 6-membered rings. The sheets are held together by partially disordered, doubly protonated MeDAP mols. Single crystal anal. showed that MDAP-2, (C4H14N2)0.5[Al3P3O12OH].0.5H2O, is isostructural with AlPO4-21 and crystallizes in the monoclinic space group P21/n with a 8.488(6), b 17.72(2), c 9.024(6) .ANG., beta 106.96(5)° and Z = 4. MDAP-2 differs from AlPO4-21 by the presence of an octahedrally coordinated aluminum in the framework.