Ultra-Tuning of the Rare-Earth fcu-MOF Aperture Size for Selective Molecular Exclusion of Branched Paraffins
AuthorsAssen, Ayalew Hussen Assen
KAUST DepartmentAdvanced Membranes and Porous Materials Research Center
Functional Materials Design, Discovery and Development (FMD3)
Physical Sciences and Engineering (PSE) Division
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AbstractUsing isoreticular chemistry allows the design and construction of a new rare-earth metal (RE) fcu-MOF with a suitable aperture size for practical steric adsorptive separations. The judicious choice of a relatively short organic building block, namely fumarate, to bridge the 12-connected RE hexanuclear clusters has afforded the contraction of the well-defined RE-fcu-MOF triangular window aperture, the sole access to the two interconnected octahedral and tetrahedral cages. The newly constructed RE (Y and Tb) fcu-MOF analogues display unprecedented total exclusion of branched paraffins from normal paraffins. The resultant window aperture size of about 4.7 Å, regarded as a sorbate-size cut-off, enabled a complete sieving of branched paraffins from normal paraffins. The results are supported by collective single gas and mixed gas/vapor adsorption and calorimetric studies.
CitationAssen AH, Belmabkhout Y, Adil K, Bhatt PM, Xue D-X, et al. (2015) Ultra-Tuning of the Rare-Earth fcu-MOF Aperture Size for Selective Molecular Exclusion of Branched Paraffins. Angewandte Chemie International Edition 54: 14353–14358. Available: http://dx.doi.org/10.1002/anie.201506345.
SponsorsResearch reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST).
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