Two Aluminophosphate Molecular Sieves Built from Pairs of Enantiomeric Structural Building Units.
Angew Chem Int Ed Engl
; 57(14): 3727-3732, 2018 03 26.
Article
em En
| MEDLINE
| ID: mdl-29504653
ABSTRACT
Herein we report the synthesis and structures of two new small-pore aluminophosphate molecular sieves PST-13 and PST-14 with mutually connected 8-ring channels. The structure of PST-13, synthesized using diethylamine as an organic structure-directing agent, contains penta-coordinated framework Al atoms bridged by hydroxy groups and thus edge-sharing 3- and 5-rings. Upon calcination, PST-13 undergoes a transformation to PST-14 with loss of bridging hydroxy groups and occluded organic species. The structures of both materials consist "nonjointly" of pairs of previously undiscovered 1,5- and 1,6-open double 4-rings (d4rs) which are mirror images of each other. We also present a series of novel chemically feasible hypothetical structures built from 1-open d4r (sti) or 1,3-open d4r (nsc) units, as well as from these two enantiomeric structural building units.
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MEDLINE
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En
Ano de publicação:
2018
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Article