Opening ZIF-8: A Catalytically Active Zeolitic Imidazolate Framework of Sodalite Topology With Unsubstituted Linkers

J Am Chem Soc. 2012 Nov 14;134(45):18790-6. doi: 10.1021/ja308786r. Epub 2012 Oct 31.

Abstract

A zeolitic imidazolate framework material of SOD topology possessing primarily unsubstituted imidazolate (im) linkers has been synthesized via solvent-assisted linker exchange (SALE) of ZIF-8. The structure of the new material, SALEM-2, has been confirmed through (1)H NMR and powder and single-crystal X-ray diffraction. SALEM-2 is the first example of a porous Zn(im)(2) ZIF possessing a truly zeolitic topology that can be obtained in bulk quantities. Upon treatment with n-butyllithium, the open analogue exhibits Brønsted base catalysis that cannot be accomplished by the parent material ZIF-8. Additionally, it displays a different size cutoff for uptake and release of molecular guests than does ZIF-8.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Catalysis
  • Imidazoles / chemistry*
  • Magnetic Resonance Spectroscopy
  • Models, Molecular
  • Molecular Structure
  • Particle Size
  • Powder Diffraction
  • Zeolites / chemical synthesis
  • Zeolites / chemistry*
  • Zinc / chemistry

Substances

  • Imidazoles
  • Zeolites
  • Zinc