Banerjee, Rahul ; Furukawa, Hiroyasu ; Britt, David ; Knobler, Carolyn ; O’Keeffe, Michael ; Yagh, Omar M. (2009) Control of Pore Size and Functionality in Isoreticular Zeolitic Imidazolate Frameworks and their Carbon Dioxide Selective Capture Properties Journal of the American Chemical Society, 131 (11). pp. 3875-3877. ISSN 0002-7863
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Official URL: https://doi.org/10.1021/ja809459e
Related URL: http://dx.doi.org/10.1021/ja809459e
Abstract
Five new crystalline zeolitic imidazolate frameworks (ZIFs), ZIF-78 to -82, were prepared from zinc(II) nitrate and mixtures of 2-nitroimidazole and five different functionalized imidazoles and were found to have the GME topology. These structures, along with three previously reported GME ZIFs, constitute a series of highly porous materials with Brunauer−Emmet−Teller surface areas ranging from 620 to 1730 m2/g. The pore diameters and apertures vary incrementally from 7.1 to 15.9 Å and 3.8 to 13.1 Å, respectively, and the functionalities decorating the pores vary from polar cyano- and nitro- groups to nonpolar alkyl groups. The variability expressed in these materials makes them highly attractive for study as gas-separation media. Selectivity values calculated for separation of CO2 and CH4 predict that the ZIFs with polar functionality, ZIF-78 (10.6:1) and -82 (9.6:1), retain CO2 gas to a greater degree than the other members of the GME series and BPL-activated carbon. These predictions are borne out in dynamic breakthrough studies, which confirm the increased capacity of ZIF-78 and -82 and demonstrate the promise of this class of materials.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
Keywords: | Chemical Structure; Isotherms; Selectivity; Mathematical Methods; Materials. |
ID Code: | 115919 |
Deposited On: | 17 Mar 2021 03:48 |
Last Modified: | 17 Mar 2021 03:57 |
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