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- Title
Ultra-Tuning of the Rare-Earth fcu-MOFAperture Size for Selective Molecular Exclusion of Branched Paraffins.
- Authors
Assen, Ayalew H.; Belmabkhout, Youssef; Adil, Karim; Bhatt, Prashant M.; Xue, Dong‐Xu; Jiang, Hao; Eddaoudi, Mohamed
- Abstract
Using 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 (Y3+ and Tb3+) 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.
- Subjects
MOLECULAR sieves; HYDROCARBON separation; ALKANES; RARE earth metal compound synthesis; ZEOLITES
- Publication
Angewandte Chemie International Edition, 2015, Vol 54, Issue 48, p14353
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201506345