Microporous mixed-metal layer-pillared [Zn1-xCu x(bdc)(dabco)0.5] MOFs: Preparation and characterization

Olesia Kozachuk, Kira Khaletskaya, Markus Halbherr, Angélique Bétard, Mikhail Meilikhov, Rüdiger W. Seidel, Bettina Jee, Andreas Pöppl, Roland A. Fischer

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

A series of mixed-metal layer-pillared MOFs of general formula [Zn 1-xCux(bdc)(dabco)0.5] (bdc = 1,4-benzenedicarboxylate, dabco = 1,4-diazabicyclo[2.2.2]octane, 0 < x < 1) have been synthesized by a solvothermal approach. Different amounts x of Cu2+ were introduced to substitute for Zn2+ centers. The prepared mixed-metal MOFs were shown to be structurally very similar to their parent monometallic [Zn(bdc)(dabco)0.5] and [Cu(bdc)(dabco) 0.5] frameworks by single-crystal and powder X-ray diffraction studies. Interestingly, upon inclusion of copper, a distortion of the paddle-wheel units is observed. In addition, the incorporation of Cu 2+ ions into the [Zn2(bdc)(dabco)0.5] framework and the formation of heterometallic Zn-Cu paddle-wheel units along with monometallic Cu-Cu and Zn-Zn units in the prepared mixed-metal MOFs were confirmed by continuous-wave EPR spectroscopy. The synthesized materials [Zn1-xCux(bdc)(dabco)0.5] are thermally stable up to 260 °C and exhibit permanent porosity with BET surface areas in the range of 800-2430 m2g-1.

Original languageEnglish
Pages (from-to)1688-1695
Number of pages8
JournalEuropean Journal of Inorganic Chemistry
Issue number10
DOIs
StatePublished - Apr 2012
Externally publishedYes

Keywords

  • Copper
  • Metal-organic frameworks
  • Microporous materials
  • X-ray diffraction
  • Zinc

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