biostudies-literatureUnknown57(19)Martinez-Lopez JCBoosting the transport and selectivity properties of membranes based on polymers of intrinsic microporosity (PIMs) toward one specific working analyte of interest is challenging. In this work, a novel family of PIM membranes, prepared by casting and exhibiting optima mechanical properties and high thermal stability, was synthesized from 4,4'-(2,2,2-trifluoro-1-phenylethane-1,1-diyl) bis(benzene-1,2-diol) and two tetrafluoro-nitrile derivatives. Gas permeability measurements evidenced a CO₂/CH₄ selectivity up to 170% relative to the reference polymer, PIM-1, in agreement with their calculated fractional free volume and the analysis of the textural properties by N₂ and CO₂ gas adsorption. Besides, the chemical modification by acid hydrolysis of theMacromolecules9442-9456https://www.ebi.ac.uk/biostudies/studies/S-EPMC11468783biostudies-literatureDibenzodioxin-Based Polymers of Intrinsic Microporosity with Enhanced Transport Properties for Lithium Ions in Aqueous Media.PMC11468783Zhao EWvan Eck ESilva Testa GOliver Cuenca VLozano AECarretero-Gonzalez JSantos Rodriguez MMartinez-Lopez JCAlvarez CfalseDibenzodioxin-Based Polymers of Intrinsic Microporosity with Enhanced Transport Properties for Lithium Ions in Aqueous Media.Boosting the transport and selectivity properties of membranes based on polymers of intrinsic microporosity (PIMs) toward one specific working analyte of interest is challenging. In this work, a novel family of PIM membranes, prepared by casting and exhibiting optima mechanical properties and high thermal stability, was synthesized from 4,4'-(2,2,2-trifluoro-1-phenylethane-1,1-diyl) bis(benzene-1,2-diol) and two tetrafluoro-nitrile derivatives. Gas permeability measurements evidenced a CO₂/CH₄ selectivity up to 170% relative to the reference polymer, PIM-1, in agreement with their calculated fractional free volume and the analysis of the textural properties by N₂ and CO₂ gas adsorption. Besides, the chemical modification by acid hydrolysis of the2024-01-01T00:00:00Z2024 Oct2026-06-07T07:43:54.318Z2025-04-04T08:17:00.18ZS-EPMC114687833939983110.1021/acs.macromol.4c01243