title: Enhanced stability of Cu-BTC MOF via perfluorohexane plasma-enhanced chemical vapor deposition.
abstract: Metal organic frameworks (MOFs) are a leading class of porous materials for a wide variety of applications, but many of them have been shown to be unstable toward water. Cu-BTC (1,3,5 benzenetricarboxylic acid, BTC) was treated with a plasma-enhanced chemical vapor deposition (PECVD) of perfluorohexane creating a hydrophobic form of Cu-BTC. It was found that the treated Cu-BTC could withstand high humidity and even submersion in water much better than unperturbed Cu-BTC. Through Monte Carlo simulations it was found that perfluorohexane sites itself in such a way within Cu-BTC as to prevent the formation of water clusters, hence preventing the decomposition of Cu-BTC by water. This PECVD of perfluorohexane could be exploited to widen the scope of practical applications of Cu-BTC and other MOFs.
authors.affiliation: Edgewood Chemical Biological Center, 5183 Blackhawk Road, Aberdeen Proving Ground, Maryland 21010, USA. jared.b.decoste2.ctr@mail.mil
authors.forename: Jared B
authors.initials: JB
authors.lastname: Decoste
authors.forename: Gregory W
authors.initials: GW
authors.lastname: Peterson
authors.forename: Martin W
authors.initials: MW
authors.lastname: Smith
authors.forename: Corinne A
authors.initials: CA
authors.lastname: Stone
authors.forename: Colin R
authors.initials: CR
authors.lastname: Willis
mesh_terms: D003300:Copper / Q000737:chemistry*; D005466:Fluorocarbons / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008958:Models, Molecular; D009942:Organometallic Compounds / Q000737:chemistry*; D016062:Porosity; D014233:Tricarboxylic Acids / Q000737:chemistry*; D014835:Volatilization; D014867:Water / Q000737:chemistry
chemical_list: D005466:Fluorocarbons; D009942:Organometallic Compounds; D014233:Tricarboxylic Acids; D014867:Water; D003300:Copper; C078626:perflexane; C069849:trimesic acid