PST-33: A Four-Layer ABC‑6 Zeolite with the
Stacking Sequence AABC
Posted on 2020-07-16 - 11:41
The
structure model of an ABC-6 family zeolite with the 4-layer
stacking sequence AABC was first proposed in 1981, but it has remained
undiscovered so far. Here, we report the synthesis of PST-33, which
is a small-pore aluminosilicate (Si/Al = 4.1) zeolite with this framework
topology, using 5-azonia-spiro[4.4]nonane ions as an organic structure-directing
agent via the so-called multiple inorganic cation approach, and its
structure solved by single-crystal X-ray crystallography. PST-33 contains
a two-dimensional 8-membered ring pore system consisting of 8-hedral
([4662]) double 6-ring (d6r), 14-hedral ([4668]) sod,
and 17-hedral ([496583]) lev cages. The Na+ form of PST-33 showed comparable
CO2 adsorption properties to the corresponding cation form
of zeolite A and chabazite.
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Lee, Hwajun; Choi, Wanuk; Choi, Hyun June; Hong, Suk Bong (2020). PST-33: A Four-Layer ABC‑6 Zeolite with the
Stacking Sequence AABC. ACS Publications. Collection. https://doi.org/10.1021/acsmaterialslett.0c00232