Gated Channels and Selectivity Tuning of CO2over N2Sorption by Post-Synthetic Modification of a UiO-66-Type Metal–Organic Framework

Alexander Kronast, Sebastian Eckstein, Peter T. Altenbuchner, Konrad Hindelang, Sergei I. Vagin, Bernhard Rieger

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

The highly porous and stable metal–organic framework (MOF) UiO-66 was altered using post-synthetic modifications (PSMs). Prefunctionalization allowed the introduction of carbon double bonds into the framework through a four-step synthesis from 2-bromo-1,4-benzenedicarboxylic acid; the organic linker 2-allyl-1,4-benzenedicarboxylic acid was obtained. The corresponding functionalized MOF (UiO-66-allyl) served as a platform for further PSMs. From UiO-66-allyl, epoxy, dibromide, thioether, diamine, and amino alcohol functionalities were synthesized. The abilities of these compounds to adsorb CO2and N2were compared, which revealed the structure–selectivity correlations. All synthesized MOFs showed profound thermal stability together with an increased ability for selective CO2uptake and molecular gate functionalities at low temperatures.

Original languageEnglish
Pages (from-to)12800-12807
Number of pages8
JournalChemistry - A European Journal
Volume22
Issue number36
DOIs
StatePublished - 26 Aug 2016

Keywords

  • UiO-66
  • carbon dioxide sorption
  • gate effects
  • metal–organic frameworks
  • post-synthetic modification

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