Two Aluminophosphate Molecular Sieves Built from Pairs of Enantiomeric Structural Building Units

Seungwan Seo; Taimin Yang; Jiho Shin; Donghui Jo; Xiaodong Zou; Suk Bong Hong

doi:10.1002/anie.201800791

Two Aluminophosphate Molecular Sieves Built from Pairs of Enantiomeric Structural Building Units

Angew Chem Int Ed Engl. 2018 Mar 26;57(14):3727-3732. doi: 10.1002/anie.201800791. Epub 2018 Mar 5.

Authors

Seungwan Seo¹, Taimin Yang², Jiho Shin¹, Donghui Jo¹, Xiaodong Zou², Suk Bong Hong¹

Affiliations

¹ Center for Ordered Nanoporous Materials Synthesis, Division of Environmental Science and Engineering, POSTECH, Pohang, 37673, Korea.
² Inorganic and Structural Chemistry and Berzelii Center EXSELENT on Porous Materials, Department of Materials and Environmental Chemistry, Stockholm University, SE-106 91, Stockholm, Sweden.

PMID: 29504653
DOI: 10.1002/anie.201800791

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.

Keywords: aluminophosphates; enantiomeric structural building units; microporous materials; structure elucidation; zeolites.

Publication types

Research Support, Non-U.S. Gov't