Site-Specific Iron Substitution in STA-28, a Large Pore Aluminophosphate Zeotype Prepared by Using 1,10-Phenanthrolines as Framework-Bound Templates |
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| Authors: | Dr. Abigail E. Watts Dr. Magdalena M. Lozinska Prof. Alexandra M. Z. Slawin Dr. Alvaro Mayoral Dr. Daniel M. Dawson Prof. Sharon E. Ashbrook Dr. Bela E. Bode Dr. A. Iulian Dugulan Prof. Mervyn D. Shannon Dr. Paul A. Cox Dr. Alessandro Turrina Prof. Paul A. Wright |
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| Affiliation: | 1. EaStCHEM School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, Fife, KY16 9ST UK;2. Instituto de Ciencia de Materiales de Aragon (ICMA), CSIC, Universidad de Zaragoza, Mariano Esquillor, 50018 Zaragoza, Spain;3. Fundamental Aspects of Materials and Energy Group, Delft University of Technology, 2629 JB Delft, The Netherlands;4. Johnson Matthey Technology Centre, Chilton P.O. Box 1, Belasis Avenue, Billingham, TS23 1LB UK;5. School of Pharmacy and Biomedical Sciences, University of Portsmouth, St. Michael's Building, White Swan Road, Portsmouth, PO1 UK |
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| 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. |
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| Keywords: | ADF STEM aluminophosphate framework-bound template iron substitution zeotype |
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