Influence of the Amide Groups in the CO<inf>2</inf>/N<inf>2</inf> Selectivity of a Series of Isoreticular, Interpenetrated Metal-Organic Frameworks

Vahid Safarifard, Sabina Rodríguez-Hermida, Vincent Guillerm, Inhar Imaz, Mina Bigdeli, Alireza Azhdari Tehrani, Jordi Juanhuix, Ali Morsali, Mirian E. Casco, Joaquín Silvestre-Albero, Enrique V. Ramos-Fernandez, Daniel Maspoch

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    41 Citations (Scopus)

    Abstract

    © 2016 American Chemical Society. Here we report the use of a pillaring strategy for the design and synthesis of three novel amide-functionalized metal-organic frameworks (MOFs), TMUs-22/-23/-24, isoreticular to the recently reported imine-functionalized TMU-6 and TMU-21 MOFs. An extensive study of their CO2 sorption properties and selectivity for CO2 over N2, from single gas sorption isotherms to breakthrough measurements, revealed that not only the incorporation of amide groups but also their accessibility is crucial to obtain enhanced CO2 sorption and CO2/N2 selectivity. Therefore, the MOF with more accessible amide groups (TMU-24) shows a CO2/N2 selectivity value of ca. 10 (as revealed by breakthrough experiments), which is ca. 500% and 700% of the selectivity values observed for the other amide-containing (TMU-22 and TMU-23) and imine-containing (TMU-6 and TMU-21) MOFs.
    Original languageEnglish
    Pages (from-to)6016-6023
    JournalCrystal Growth and Design
    Volume16
    Issue number10
    DOIs
    Publication statusPublished - 5 Oct 2016

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