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- Title
Effect of Functionalized Groups on Gas-Adsorption Properties: Syntheses of Functionalized Microporous Metal–Organic Frameworks and Their High Gas-Storage Capacity.
- Authors
Wang, Yanlong; Tan, Chunhong; Sun, Zhihao; Xue, Zhenzhen; Zhu, Qilong; Shen, Chaojun; Wen, Yuehong; Hu, Shengmin; Wang, Yong; Sheng, Tianlu; Wu, Xintao
- Abstract
The microporous metal–organic framework (MMOF) Zn4O(L1)2·9DMF·9H2O (1-H) and its functionalized derivatives Zn4O(L1-CH3)2·9DMF·9H2O (2-CH3) and Zn4O(L1-Cl)2·9DMF·9H2O (3-Cl) have been synthesized and characterized (H3L1=4-[N,N-bis(4-methylbenzoic acid)amino]benzoic acid, H3L1-CH3=4-[N,N-bis(4-methylbenzoic acid)amino]-2- methylbenzoic acid, H3L1-Cl=4-[N,N-bis(4-methylbenzoic acid)amino]-2-chlorobenzoic acid). Single-crystal X-ray diffraction analyses confirmed that the two functionalized MMOFs are isostructural to their parent MMOF, and are twofold interpenetrated three-dimensional (3D) microporous frameworks. All of the samples possess enduring porosity with Langmuir surface areas over 1950 cm2g–1. Their pore volumes and surface areas decrease in the order 1-H>2-CH3>3-Cl. Gas-adsorption studies show that the H2 uptakes of these samples are among the highest of the MMOFs (2.37 wt% for 3-Cl at 77 K and 1 bar), although their structures are interpenetrating. Furthermore, this work reveals that the adsorbate–adsorbent interaction plays a more important role in the gas-adsorption properties of these samples at low pressure, whereas the effects of the pore volumes and surface areas dominate the gas-adsorption properties at high pressure.
- Subjects
METAL-organic frameworks; GAS absorption &; adsorption; X-ray diffraction; ADSORPTION isotherms; LANGMUIR isotherms
- Publication
Chemistry - A European Journal, 2014, Vol 20, Issue 5, p1341
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201302541