期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 139, 期 2, 页码 599-602出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.6b11373
关键词
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资金
- U.S. Army Research Laboratory
- U.S. Army Research Office [W911NF-15-2-0107]
- Defense Threat Reduction Agency [BB11PHM156]
- U.S. Department of Energy [DE-AC02-06CH11357, DE-AC02-76SF00515, DE-SC0012704, DE-SC0012335]
Zr-based metal organic frameworks (MOFs) have been recently shown to be among the fastest catalysts of nerve-agent. hydrolysis in solution. We report a detailed study of the adsorption and decomposition of a nerve-agent simulant, dimethyl methylphosphonate (DMMP), on UiO-66, UiO-67, MOF-808, and NU-1000 using synchrotron-based X-ray powder diffraction, X-ray absorption, and infrared spectroscopy, which reveals key aspects of the reaction mechanism. The diffraction measurements indicate that all four MOFs adsorb DMMP (introduced at atmospheric pressures through a flow of helium or air) within the pore space. In addition, the combinatitin of X-ray absorption and infrared spectra suggests direct coordination of DMMP to the Zr-6 cores of all MOFs, which ultimately leads to decomposition to phosphonate products. These experimental probes into the mechanism of adsorption and decomposition of chemical warfare agent simulants on Zr-based MOFs open new opportunities in rational design of new and superior decontamination materials.
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