Ionothermal synthesis and characterization of CoAPO-34 molecular sieve

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The cobalt-doped aluminophosphate molecular sieve, CoAPO-34 (with the chabazite-type topology) was prepared under ionothermal conditions using 1-ethyl-3-methylimidazolium bromide (EMIMBr) ionic liquid in presence of 1,6-hexanediamine (HDA). The HDA is not incorporated in CoAPO-34, but is required to mediate the availability of Co2+ during the synthesis. The material was characterized using powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA) and solid-state NMR spectroscopy. Wideline 31P NMR spectroscopy showed broad signals (∼5000–10000 ppm wide), confirming that paramagnetic cobalt ions are successfully incorporated within the framework of the materials.
Original languageEnglish
Pages (from-to)336-341
Number of pages6
JournalMicroporous and Mesoporous Materials
Early online date28 Sept 2016
Publication statusPublished - Feb 2017


  • CoAPO-34
  • Aluminophosphate
  • Ionothermal synthesis
  • 1-ethyl-3-methylimidazolium bromide
  • 1,6-hexanediamine


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