Site‐Specific Iron Substitution in STA‐28, a Large Pore Aluminophosphate Zeotype Prepared by Using 1, 10‐Phenanthrolines as Framework‐Bound Templates. (8th June 2020)

• Record Type: Journal Article
• Authors: Watts, Abigail E.; Lozinska, Magdalena M.; Slawin, Alexandra M. Z.; Mayoral, Alvaro; Dawson, Daniel M.; Ashbrook, Sharon E.; Bode, Bela E.; Dugulan, A. Iulian; Shannon, Mervyn D.; Cox, Paul A.; Turrina, Alessandro; Wright, Paul A.
• Is Part Of: Angewandte Chemie. Volume 132:Number 35(2020)
• Page Start: 15298
• Page End: 15302
• Publication Date: 2020-06-08
• Subjects: ADF STEM -- aluminophosphate -- framework-bound template -- iron substitution -- zeotype; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202005558
• Languages: English
• ISSNs: 0044-8249

Abstract

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 AlO4 N2 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 m 2 g −1 and two perpendicular sets of channels that intersect to give pore space connected by 12‐ring openings along all crystallographic directions. Abstract : The aromatic diamine 1, 10‐phenanthroline acts as a framework‐bound template for the large‐pore aluminophosphate zeotype STA‐28 and can be used to introduce Fe for Al at a single crystallographic site, as verified by Rietveld refinement and annular dark field scanning transmission electron microscopy. Removal of the template leaves a crystalline microporous solid with accessible iron cations.