An Open-Framework Aluminophosphite with Face-Sharing AlO6 Octahedra Dimers and Extra-Large 14-Ring Channels
Journal
Crystal Growth & Design
Journal Volume
18
Journal Issue
3
Pages
1267-1271
Date Issued
2018
Author(s)
Lin, Cong
Pan, Fengjuan
Li, Jian
Chen, Yanping
Shi, Dier
Ma, Tianqiong
Yang, Yanquan
Du, Xin
Wang, Wei
Liao, Fuhui
Lin, Jianhua
Yang, Tao
Sun, Junliang
Abstract
PKU-25Al, an open-framework aluminophosphite possessing extra-large intersecting 14-ring (14R) channels and a novel Al/P ratio of 9/14, was hydrothermally synthesized using commercially available 4-dimethylaminopyridine (DMAP) as organic structure-directing agents (OSDA). Two types of secondary building units (SBUs), SBU-1 with 6∗1 units and racemic SBU-2 composed of two chiral 41 units, are utilized to construct the porous layers with a 4.6.12-net topology and the chains with unprecedented face-sharing AlO6 octahedra dimers, respectively. Stringing the ABAB stacked layers via the chains would achieve the PKU-25Al framework with a unique topology as well as numerous chiral channel motifs. Meanwhile, the protonated DMAP molecules interact with the inorganic framework through hydrogen bonding and reside in the voids with an exceptional triangular pattern. PKU-25Al is the first aluminophosphite with extra-large channels and enriches the materials chemistry of the open-framework families with exceptive structures.
Type
journal article