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Influence of the Amide Groups in the CO2/N2 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

Research output: Contribution to journalArticlepeer-review

85 Scopus citations

Abstract

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
Number of pages8
JournalCrystal Growth and Design
Volume16
Issue number10
DOIs
StatePublished - 5 Oct 2016
Externally publishedYes

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