期刊
CHEMISTRY OF MATERIALS
卷 21, 期 20, 页码 4768-4777出版社
AMER CHEMICAL SOC
DOI: 10.1021/cm803218f
关键词
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资金
- Korea Research Foundation [KRF-2006-352-D00040]
- U.S. Dept. of Energy's Office of Science [DE-FG02-01ER15244]
- U.S. National Science Foundation [CTS-0507013]
- TeraGrid computing facilities
- National Research Foundation of Korea [2006-352-D00040] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
A large-pore IRMOF-16-like material (1) was synthesized solvothermally and evacuated by two solvent removal procedures: the original chloroform (CHCl3) method and a new supercritical carbon dioxide (SCID) method. Using several experimental and geometric characterization tools, including thermogravimetric analysis (TGA), powder X-ray diffraction (PXRD), and pore size analysis, we propose that 1 is a mixture of noncatenated IRMOF-16 and the corresponding 2-fold interwoven structure and is partially collapsed during the evacuation, especially some of the larger pores. Adsorption measurements using several gases at 77 and 298 K showed that the new SCD evacuation is superior to the conventional CHCl3 evacuation for increasing the adsorption kinetics as well as the adsorption capacity. This work illustrates a new strategy that combines several experimental methods, geometric calculations, and molecular simulations for the characterization of metalorganic frameworks (MOFs), especially those with large pores. This combination should be helpful for future characterization of new MOFs that possibly include some imperfections such as nonuniform catenation and partial collapse of the crystalline phase.
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