z-logo
Premium
PST‐24: A Zeolite with Varying Intracrystalline Channel Dimensionality
Author(s) -
Jo Donghui,
Zhao Jingjing,
Cho Jung,
Lee Jeong Hwan,
Liu Yang,
Liu Changjun,
Zou Xiaodong,
Hong Suk Bong
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202007804
Subject(s) - zeolite , zigzag , curse of dimensionality , yield (engineering) , ring (chemistry) , crystallography , materials science , channel (broadcasting) , chemistry , chemical engineering , catalysis , composite material , geometry , mathematics , computer science , organic chemistry , engineering , telecommunications , statistics
Herein we report the synthesis, structure solution, and catalytic properties of PST‐24, a novel channel‐based medium‐pore zeolite. This zeolite was synthesized via the excess fluoride approach. Electron diffraction shows that its structure is built by composite cas‐zigzag (cas‐zz) building chains, which are connected by double 5‐ring (d5r) columns. While the cas‐zz building chains are ordered in the PST‐24 framework, the d5r columns adopt one of two possible arrangements; the two adjacent d5r columns are either at the same height or at different heights, denoted arrangements S and D, which can be regarded as open and closed valves that connect the channels, respectively. A framework with arrangement D only has a 2D 10‐ring channel system, whereas that with arrangement S only contains 3D channels. In actual PST‐24 crystals, the open and closed valves are almost randomly dispersed to yield a zeolite framework where the channel dimensionality varies locally from 2D to 3D.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here