Gas Sorption Studies on a Microporous Coordination Polymer Assembled from 2D Grid Layers by Strong π–π Interactions |
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| Authors: | Dr. Xiaoxia Lv Dr. Liangjun Li Xiaoming Sun Prof. Hongyu Zhang Jinjun Cai Chao Wang Prof. Sifu Tang Prof. Xuebo Zhao |
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| Affiliation: | 1. Laboratory for Hydrogen Storage & Novel Nanoporous Materials, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Science, Qingdao 266101 (China), Fax: (+86)?0532‐80662728;2. State Key Laboratory of Heavy Oil, School of Chemical Engineering, China University of Petroleum, No. 66, Changjiang West Road, Qingdao Economic & Technical Development Zone, Qingdao 266555 (China) |
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| Abstract: | The microporous coordination polymer [Co(H2L)(bipy)0.5] ? 2 H2O ( 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 (H4L) 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 [CoO3N] 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 CO2, H2, CH4, N2, and O2 on this coordination polymer were performed, and the results revealed interesting dynamic and hysteresis sorption behavior toward H2 at low temperature. |
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| Keywords: | coordination polymers diphosphonate ligand hysteresis sorption pi interactions polymers |
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