Synthesis and characterization of a new microporous aluminophosphate [Al2P2O8][OCH2CH2NH3] with an open-framework analogous to AlPO4-D

A new microporous aluminophosphate [Al2P2O8][OCH2CH2NH3], denoted APO-CJ3 ( CJ3: China, Jilin University, number 3), has been prepared from aqueous as well as non-aqueous systems. The as-synthesized product is characterized by scanning electron microscopy, X-ray powder diffraction, Al-27 and P-31 mag ic-angle-spinning NMR, thermogravimetric and differential thermal analyses. The structure has been solved by single-crystal X-ray diffraction analysis . APO-CJ3 crystallizes in the orthorhombic space group Pbca, with a = 9.993 (2) Angstrom, b = 8.583(3) Angstrom, c = 19.705(4) Angstrom and Z = 8. The structure resembles microporous aluminophosphate AlPO4-D, and is featured b y chains of four-membered rings that are connected by UDUD linkages. The co mpound contains two kinds of Al atoms, one is four-coordinated and the othe r is six-coordinated linking another six-coordinated Al atom by the linkage s of bridging O atom of ethanolamine template. Upon removal of the template above 450 degrees C, the structure of APO-CJ3 transforms to AlPO4-D. (C) 2 000 Elsevier Science B.V. All rights reserved.