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Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

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Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance

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dc.contributor.author	Castells-Gil, Javier
dc.contributor.author	Novio, Fernando
dc.contributor.author	Padial, Natalia M.
dc.contributor.author	Tatay Aguilar, Sergio
dc.contributor.author	Ruiz-Molina, Daniel
dc.contributor.author	Martí Gastaldo, Carlos
dc.date.accessioned	2019-06-18T14:39:38Z
dc.date.available	2020-05-09T04:45:06Z
dc.date.issued	2018
dc.identifier.citation	Castells-Gil, Javier Novio, Fernando Padial, Natalia M. Tatay Aguilar, Sergio Ruiz-Molina, Daniel Martí Gastaldo, Carlos 2018 Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance Jove-Journal Of Visualized Experiments 139 e58052
dc.identifier.uri	https://hdl.handle.net/10550/70498
dc.description.abstract	Metal-organic frameworks (MOFs) are a class of porous inorganic materials with promising properties in gas storage and separation, catalysis and sensing. However, the main issue limiting their applicability is their poor stability in humid conditions. The common methods to overcome this problem involve the formation of strong metal-linker bonds by using highly charged metals, which is limited to a number of structures, the introduction of alkylic groups to the framework by post-synthetic modification (PSM) or chemical vapour deposition (CVD) to enhance overall hydrophobicity of the framework. These last two usually provoke a drastic reduction of the porosity of the material. These strategies do not permit to exploit the properties of the MOF already available and it is imperative to find new methods to enhance the stability of MOFs in water while keeping their properties intact. Herein, we report a novel method to enhance the water stability of MOF crystals featuring Cu2(O2C)4 paddle-wheel units, such as HKUST (where HKUST stands for Hong Kong University of Science & Technology), with the catechols functionalized with alkyl and fluoro-alkyl chains. By taking advantage of the unsaturated metal sites and the catalytic catecholase-like activity of CuII ions, we are able to create robust hydrophobic coatings through the oxidation and subsequent polymerization of the catechol units on the surface of the crystals under anaerobic and water-free conditions without disrupting the underlying structure of the framework. This approach not only affords the material with improved water stability but also provides control over the function of the protective coating, which enables the development of functional coatings for the adsorption and separations of volatile organic compounds. We are confident that this approach could also be extended to other unstable MOFs featuring open metal sites.
dc.language.iso	eng
dc.relation.ispartof	Jove-Journal Of Visualized Experiments, 2018, vol. 139, p. e58052
dc.subject	Química organometàl·lica
dc.subject	Compostos orgànics
dc.title	Surface Functionalization of Metal-Organic Frameworks for Improved Moisture Resistance
dc.type	journal article	es_ES
dc.date.updated	2019-06-18T14:39:38Z
dc.identifier.doi	10.3791/58052
dc.identifier.idgrec	129361
dc.embargo.terms	24 mesos
dc.rights.accessRights	open access	es_ES