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dc.contributor.authorGhanem, Bader
dc.contributor.authorSwaidan, Raja
dc.contributor.authorMa, Xiaohua
dc.contributor.authorLitwiller, Eric
dc.contributor.authorPinnau, Ingo
dc.date.accessioned2015-08-03T12:05:02Z
dc.date.available2015-08-03T12:05:02Z
dc.date.issued2014-07-19
dc.identifier.issn09359648
dc.identifier.doi10.1002/adma.201401328
dc.identifier.doi10.1002/adma.201470264
dc.identifier.urihttp://hdl.handle.net/10754/563633
dc.description.abstractThe synthesis, microstructures, and exceptional gas transport properties of two new soluble ladder polymers, polymers of intrinsic microporosity (TPIM-1 and TPIM-2) containing triptycene moieties substituted with branched isopropyl and linear propyl chains at the 9,10-bridgeheads were reported. The precursor A-B monomers were modified with an o -difluoride functionality for enhanced activation for nucleophilic aromatic substitution. In a Schlenk tube, a mixture of the A-B monomer, 18-crown-6, anhydrous DMF and anhydrous potassium carbonate was stirred at 155 °C under nitrogen atmosphere for 20 min followed by the addition of toluene. The reaction was continued for another 45 min and more toluene was added. After another 45 min the reaction mixture was cooled to room temperature and poured into methanol. Slow evaporation of filtered, dilute 3-5 wt% chloroform solutions from a leveled glass plate yielded isotropic polymer films. Dry membranes were soaked in methanol for 24 h, air-dried, and then heated at 120°C for 24 h under high vacuum to remove any traces of residual solvent. TPIM-1 exhibits simultaneous boosts in permeability and selectivity, which highlights the significant potential of an isopropyl-substituted triptycene moiety as a contortion center for ladder PIMs.
dc.description.sponsorshipThis research was supported by King Abdullah University of Science and Technology baseline funding for Ingo Pinnau.
dc.publisherWiley-VCH Verlag
dc.subjectA-B polymers
dc.subjectGas separation
dc.subjectHydrogen
dc.subjectMembranes
dc.subjectMolecular sieves
dc.subjectPolymers of intrinsic microporosity (PIMs)
dc.titleEnergy-efficient hydrogen separation by AB-type ladder-polymer molecular sieves
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentChemical and Biological Engineering Program
dc.identifier.journalAdvanced Materials
kaust.personGhanem, Bader
kaust.personSwaidan, Raja
kaust.personMa, Xiaohua
kaust.personLitwiller, Eric
kaust.personPinnau, Ingo
dc.date.published-online2014-07-19
dc.date.published-print2014-10


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