258927 Enhanced Stability of Metal-Organic Frameworks Via Plasma-Enhanced Chemical Vapor Deposition

Thursday, November 1, 2012: 3:15 PM
405 (Convention Center )
Gregory W. Peterson1, Jared DeCoste2, Colin Willis3, Martin Smith3 and Corinne Stone3, (1)Research & Technology Directorate, U.S. Army Research, Development and Engineering Command, Edgewood Chemical Biological Center, Aberdeen Proving Ground, MD, (2)ECBC, APG, MD, (3)Dstl, Porton Down, United Kingdom

Metal organic frameworks (MOFs) have become a leading class of porous materials for applications such as gas storage, catalysis, and toxic gas removal.  Yet, many interesting MOFs, especially those with coordinatively unsaturated metal centers and/or carboxylate linkers, are prone to degradation from moisture, making them less useful for ambient operations.  Through treatment of Cu3BTC2 MOF with plasma-enhanced chemical vapor deposition of perfluorohexane, we have sufficiently modified the structure such that it is more-resistant to moisture degradation.  Characterization with 13F NMR shows the presence of perfluoro groups within the pore structure, reducing water-clustering and increasing the metal-oxo bond stability.  Ammonia breakthrough studies indicate that, not only does the material retain its high ammonia capacity post-treatment, but the stability actually increases retention and capacity under low and high humidity conditions.  Further work is currently being explored on a variety of plasma/MOF systems to study the effects of perfluoro compound and metal-linker behavior.

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See more of this Session: Adsorbent Materials-MOFs
See more of this Group/Topical: Separations Division