A microporous Co2+ metal organic framework with single-crystal to single-crystal transformation properties and high CO2 uptake

Eleni E. Moushi, Andreas Kourtellaris, Ioannis Spanopoulos, Manolis J. Manos, Giannis S. Papaefstathiou, Pantelis N. Trikalitis, Anastasios J. Tasiopoulos*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

The synthesis and characterization of {[Co9(INA)18(H2O)6]·11DMF·15H2O} (Co9-INA·11DMF·15H2O) (INA- = the anion of isonicotinic acid) is reported. It exhibits a rigid 3D-porous structure with a Co9 repeating unit consisting of four [CoII2(μ-O2CR)2(μ-H2O)] subunits (two unique) linked through bridging INA- ligands to an isolated CoII ion (half unique). The [CoII2] dimers and the isolated CoII ion have assembled to create a trinodal (6,7,8)-coordinated network with point symbol (32.411.56.62)2(32.418.54.64)2(34.44.54.63). Gas sorption studies revealed that Co9-INA exhibits 910 m2 g-1 BET area, 4.2 mmol g-1 CO2 uptake at 273 K/1 bar, and 6.7 CO2/CH4 selectivity at zero coverage. Furthermore, Co9-INA displays capability for exchange of the guest solvent molecules by various organic molecules in a single-crystal to single-crystal fashion. Direct and alternating current magnetic susceptibility studies revealed the existence of dominant antiferromagnetic interactions between the Co2+ ions that result in a paramagnetic ST = 3/2 spin ground state value. Overall, this work emphasizes the potential of relatively simple and inexpensive polytopic ligands, such as isonicotic acid, to stabilize microporous MOFs with significant CO2 sorption capacity.

Original languageEnglish (US)
Pages (from-to)185-193
Number of pages9
JournalCrystal Growth and Design
Volume15
Issue number1
DOIs
StatePublished - Jan 7 2015

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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