Preparation of aluminophosphate molecular sieves in the presence of nickel( II) and copper( II)

Abstract

Nickel(ll)-substituted aluminophosphates of structure types 21 and 12 (NiAPO-21 and NiAPO-12) have been prepared hydrothermally in the presence of ethylenediamine as the template. U.v.-visible spectroscopy of NiAPO-21 suggests that Ni(ll) replaces hexacoordinated aluminum of the AIP04-21 framework and is octahedrally coordinated by the 0 atoms of the aluminophosphate skeleton and also by H20 and en molecules. It has also been found that in the presence of copper no aluminophosphate-type products can be obtained.