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https://hdl.handle.net/2440/67043
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Type: | Journal article |
Title: | Exceptional ammonia uptake by a covalent organic framework |
Author: | Doonan, C. Tranchemontagne, D. Glover, T. Hunt, J. Yaghi, O. |
Citation: | Nature Chemistry, 2010; 2(3):235-238 |
Publisher: | Nature Publishing Group |
Issue Date: | 2010 |
ISSN: | 1755-4330 1755-4349 |
Statement of Responsibility: | Christian J. Doonan, David J. Tranchemontagne, T. Grant Glover, Joseph R. Hunt and Omar M. Yaghi |
Abstract: | Covalent organic frameworks (COFs) are porous crystalline materials composed of light elements linked by strong covalent bonds. A number of these materials contain a high density of Lewis acid boron sites that can strongly interact with Lewis basic guests, which makes them ideal for the storage of corrosive chemicals such as ammonia. We found that a member of the covalent organic framework family, COF-10, shows the highest uptake capacity (15 mol kg−1, 298 K, 1 bar) of any porous material, including microporous 13X zeolite (9 mol kg−1), Amberlyst 15 (11 mol kg−1) and mesoporous silica, MCM-41 (7.9 mol kg−1). Notably, ammonia can be removed from the pores of COF-10 by heating samples at 200°C under vacuum. In addition, repeated adsorption of ammonia into COF-10 causes a shift in the interlayer packing, which reduces its apparent surface area to nitrogen. However, owing to the strong Lewis acid–base interactions, the total uptake capacity of ammonia and the structural integrity of the COF are maintained after several cycles of adsorption/desorption. |
Keywords: | Ammonia Organic Chemicals Adsorption Porosity |
Rights: | © 2010 Macmillan Publishers Limited. All rights reserved. |
DOI: | 10.1038/nchem.548 |
Published version: | http://dx.doi.org/10.1038/nchem.548 |
Appears in Collections: | Aurora harvest Chemistry publications Environment Institute publications |
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