title: Energy-efficient hydrogen separation by AB-type ladder-polymer molecular sieves.
abstract: Increases in hydrogen selectivity of more than 100% compared with the most selective ladder polymer of intrinsic microporosity (PIM) reported to date are achieved with self-polymerized A-B-type ladder monomers comprising rigid and three-dimensional 9,10-dialkyl-substituted triptycene moieties. The selectivities match those of materials commercially employed in hydrogen separation, but the gas permeabilities are 150-fold higher. This new polymer molecular sieve is also the most selective PIM for air separation.
authors.affiliation: Advanced Membranes and Porous Materials Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology (KAUST), Al-Jazri Building, Thuwal, 23955-6900, Saudi Arabia.
authors.forename: Bader S
authors.initials: BS
authors.lastname: Ghanem
authors.forename: Raja
authors.initials: R
authors.lastname: Swaidan
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Ma
authors.forename: Eric
authors.initials: E
authors.lastname: Litwiller
authors.forename: Ingo
authors.initials: I
authors.lastname: Pinnau
keywords: A-B polymers; gas separation; hydrogen; membranes; molecular sieves; polymers of intrinsic microporosity (PIMs)