首页|Imine-linked porous aromatic frameworks based on spirobifluorene building blocks for CO2 separation
Imine-linked porous aromatic frameworks based on spirobifluorene building blocks for CO2 separation
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NSTL
Elsevier
? 2022 Elsevier Inc.Porous organic frameworks entirely composed of organic building blocks are attracting more and more attention owing to their tunable porosity, lightweight and hydrolytic stability. Three novel porous aromatic frameworks (PAFs) based on the [4 + 3] design strategy have been synthesized from spirobifluorene building block as square node and various triangle nodes respectively via imine condensation. These materials are all semiconductors and permanently microporous amorphous polymer with high thermal stabilities. The Brunauer-Emmett-Teller (BET) surface areas of these PAFs are between 389 and 698 m2/g. More importantly, these frameworks exhibit good CO2 uptake (4.0 mmol/g for PAF-131) and outstanding ideal adsorption selectivities for CO2/N2 (121 for PAF-131) and CO2/CH4 (327 for PAF-131) at 273 K and 1 bar, thus showing that they are good candidates for CO2 capture.
CO2 capturePorous organic frameworksSemiconductorSpirobifluorene
Li X.、Zhao T.、Ren H.、Sun F.、Zu Y.、Li J.
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State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin University
NSTL
Elsevier
