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Gas Sorption Studies on a Microporous Coordination Polymer Assembled from 2D Grid Layers by Strong π–π Interactions
Author(s) -
Lv Xiaoxia,
Li Liangjun,
Sun Xiaoming,
Zhang Hongyu,
Cai Jinjun,
Wang Chao,
Tang Sifu,
Zhao Xuebo
Publication year - 2014
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201301327
Subject(s) - microporous material , sorption , ligand (biochemistry) , stacking , crystallography , phenylene , coordination polymer , hydrothermal circulation , methylene , materials science , polymer , propane , hydrothermal synthesis , chemistry , crystal structure , chemical engineering , organic chemistry , adsorption , biochemistry , receptor , engineering
The microporous coordination polymer [Co(H 2 L)(bipy) 0.5 ] ⋅ 2 H 2 O ( 1 , bipy=4,4′‐bipyridine) was synthesized on the basis of the V‐shaped flexible diphosphonate ligand (2,4,6‐trimethyl‐1,3‐phenylene)bis(methylene)diphosphonic acid (H 4 L) and the auxiliary bipy ligand under hydrothermal conditions. The structure of this compound was characterized by single‐crystal X‐ray diffraction. By joining the diphosphonate ligands and bipy through tetrahedral [CoO 3 N] clusters, a 2D square grid layered network was formed. Further stacking of these layers on the basis of π–π interactions resulted in a pseudo‐3D microporous network with 1D channels running through the a axis. Gas sorption studies for CO 2 , H 2 , CH 4 , N 2 , and O 2 on this coordination polymer were performed, and the results revealed interesting dynamic and hysteresis sorption behavior toward H 2 at low temperature.