Covalent post-functionalization of Zeolitic imidazolate framework ZIF-90 membrane for enhanced hydrogen selectivity

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Abstract

MOF constrictor: Covalent modification of a ZIF-90 membrane was achieved by imine condensation of the aldehyde groups of the metal-organic framework (MOF) linker by ethanolamine (see picture). The modification leads to constriction of the pore apertures and prevents unselective permeation through defect pores, thus improving gas separation performance. For a H2/CO2 mixture, selectivity can be increased from 7.3 to 62.5.

Original languageEnglish
Pages (from-to)4979-4982
Number of pages4
JournalAngewandte Chemie - International Edition
Volume50
Issue number21
DOIs
StatePublished - 16 May 2011
Externally publishedYes

Keywords

  • imidazolate
  • membranes
  • metal-organic frameworks
  • molecular sieves
  • post-synthetic modification

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