Abstract
An AlPO4 zeotype has been prepared using the aromatic diamine 1,10‐phenanthroline and some of its methylated analogues as templates. In each case the two template N atoms bind to a specific framework Al site to expand its coordination to the unusual octahedral AlO4N2 environment. Furthermore, using this framework‐bound template, Fe atoms can be included selectively at this site in the framework by direct synthesis, as confirmed by annular dark field scanning transmission electron microscopy and Rietveld refinement. Calcination removes the organic molecules to give large pore framework solids, with BET surface areas up to 540 m2 g−1 and two perpendicular sets of channels that intersect to give pore space connected by 12‐ring openings along all crystallographic directions.
Highlights
An AlPO4 zeotype has been prepared using the aromatic diamine 1,10-phenanthroline and some of its methylated analogues as templates
We describe the synthesis of an AlPO zeotype, STA28, using as the organic structure directing agents (OSDAs) the aromatic diamine 1,10-phenanthroline (1,10-phen) and some of its methylated analogues (Scheme 1). 1,10-Phen is known for its strong complexation properties, in tris-1,10-phen complexes of Fe2+ and Fe3+.[10]
The 1,10-phen was removed and the structure allowed to achieve an energy minimised configuration, without symmetry constraints, using the GULP program.[20]. This modelled “de-templated” STA28 structure can best be described in the orthorhombic space group Fddd (SI, section S13) and all Al sites adopt tetrahedral geometry
Summary
Aluminophosphate Zeotype Prepared by Using 1,10-Phenanthrolines as Framework-Bound Templates.
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