Opening metal-organic frameworks Vol. 2: Inserting longer pillars into pillared-paddlewheel structures through solvent-assisted linker exchange

Olga Karagiaridi, Wojciech Bury, Emmanuel Tylianakis, Amy A. Sarjeant, Joseph T. Hupp, Omar K. Farha

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Solvent-assisted linker exchange (SALE) was performed on a pillared-paddlewheel metal-organic framework (MOF), SALEM-5, to achieve incorporation of longer linkers into the material. The 9-Å meso-1,2-di(4-pyridyl)-1,2-ethanediol pillar of SALEM-5 was successfully replaced by 11-Å, 14-Å, and 17-Å pillars to generate daughter MOFs SALEM-6, SALEM-7, and SALEM-8. The daughter frameworks possess more open cages, as was demonstrated by structural modeling from the powder X-ray diffraction patterns, and larger solvent accessible space, as was demonstrated by thermogravimetric analysis. Finally, a study was performed to examine the effect of pKa of monoprotonated dipyridyl pillars (as an indicator of the Zn-L bond strength) on the outcome of SALE.

Original languageEnglish
Pages (from-to)3499-3503
Number of pages5
JournalChemistry of Materials
Issue number17
Publication statusPublished - Sep 10 2013



  • metal-organic frameworks
  • p K
  • solvent-assisted linker exchange

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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