Journal ArticleDOI
71Ga Slow-CTMAS NMR and Crystal Structures of MOF-Type Gallium Carboxylates with Infinite Edge-Sharing Octahedra Chains (MIL-120 and MIL-124)
Redouane Hajjar,Christophe Volkringer,Thierry Loiseau,Nathalie Guillou,Jérôme Marrot,Gérard Férey,Irene Margiolaki,Gerhard Fink,Cláudia Morais,Francis Taulelle +9 more
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TLDR
In this paper, two gallium carboxylates of MOF-type have been synthesized by using 1,2,4,5-benzenetetracarboxylate (Ga4(OH)8[C10O8H2]·5−5.6H2O or MIL-120) or 1, 2, 4, 5 -benzenetricarboxylic acid (MIL-124) as linkers.Abstract:
Two gallium carboxylates of MOF-type have been hydrothermally synthesized (210 °C) by using 1,2,4,5-benzenetetracarboxylate (Ga4(OH)8[C10O8H2]·5−5.6H2O or MIL-120) or 1,2,4-benzenetricarboxylate (Ga2(OH)4[C9O6H4] or MIL-124) as linkers. The structures of both compounds solved from XRD analysis, revealed two independent crystallographic sites for the gallium atoms, which are connected to each other through μ2-hydroxo edge, generating zigzag chains with a cis−trans mode. The inorganic ribbons are linked to each other via all the carboxylate functions of the pyromellitate ligand to form a 3D framework (MIL-120) or two of the carboxylate arms of the trimellitate ligand to form a 2D structure (MIL-124). For the latter, one of the carboxylate arms is not bonded to the gallium centers, resulting in the layered aspect of the final structure. Solid-state NMR using the slow-CTMAS method has been successfully implemented for the determination of the gallium site parameters for MIL-120, allowing more resolved spectra...read more
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Eu(III)-functionalized MIL-124 as fluorescent probe for highly selectively sensing ions and organic small molecules especially for Fe(III) and Fe(II).
Xiao-Yu Xu,Bing Yan +1 more
TL;DR: Remarkably, it is the first Eu-doped MOF to exhibit an excellent ability for the detection of Fe(3+) and Fe(2+) in an aqueous environment without any structural disintegration of the framework.
Journal ArticleDOI
Structure and Dynamics of the Functionalized MOF Type UiO-66(Zr): NMR and Dielectric Relaxation Spectroscopies Coupled with DFT Calculations
Sabine Devautour-Vinot,Guillaume Maurin,Christian Serre,Patricia Horcajada,Denise Paula da Cunha,Vincent Guillerm,Elisângela S. Costa,Elisângela S. Costa,Francis Taulelle,Charlotte Martineau +9 more
TL;DR: In this paper, an innovative combining approach applied to the complex architecture of MOFs has been revealed successful not only to unambiguously assign all the NMR signals to the corresponding crystallographic sites but also to validate the crystal structures for each functionalized material that were only predicted so far.
Journal ArticleDOI
Application of Metal‐organic Frameworks
TL;DR: In this article, the potential and emerging applications of metal-−-organic frameworks and porous coordination polymers are discussed, and a mini-review is presented, focusing on the potential applications of these materials.
Journal ArticleDOI
Solid-State NMR Spectroscopy of Metal–Organic Framework Compounds (MOFs)
Herbert C. Hoffmann,Marta Debowski,Philipp Müller,Silvia Paasch,Irena Senkovska,Stefan Kaskel,Eike Brunner +6 more
TL;DR: Nuclear Magnetic Resonance (NMR) spectroscopy is a well-established method for the investigation of various types of porous materials and metal-organic frameworks have attracted increasing research interest as mentioned in this paper.
Journal ArticleDOI
The Influence of Intrinsic Framework Flexibility on Adsorption in Nanoporous Materials.
Matthew Witman,Sanliang Ling,Sudi Jawahery,Peter G. Boyd,Maciej Haranczyk,Ben Slater,Berend Smit,Berend Smit +7 more
TL;DR: A simple analytical model is developed that predicts a material’s Henry regime adsorption and selectivity as a function of flexibility and concludes that the globally optimal material will have the optimal pore size/ chemistry and minimal intrinsic flexibility even though other nonoptimal materials’ selectivity can actually be improved by flexibility.
References
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Journal ArticleDOI
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Journal ArticleDOI
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