Zirconium-Based Metal-Organic Framework with 9-Connected Nodes for Ammonia Capture

Yongwei Chen, Xuan Zhang, Kaikai Ma, Zhijie Chen, Xingjie Wang, Julia Knapp, Selim Alayoglu, Fenfen Wang, Qibin Xia, Zhong Li, Timur Islamoglu, Omar K. Farha*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

58 Scopus citations


Construction of multifunctional metal-organic frameworks (MOFs) with asymmetric connectivity have the potential to expand the scope of their utilization. Herein, we report a robust microporous Zr-based MOF with 9-connected Zr6 nodes, NU-300, assembled from low symmetry tricarboxylate ligands and Zr6 nodes. As indicated by single-crystal X-ray diffraction analysis, there exist uncoordinated carboxylate groups in the structure of NU-300 that can participate in ammonia (NH3) sorption through acid-base interactions which yield high uptake of NH3 at low pressure regions (<0.01 bar). In situ infrared (IR) spectroscopy shows the interactions between Brønsted acidic sites and NH3, which suggests that NU-300 can be used as a sorbent for NH3 capture at low pressures.

Original languageEnglish (US)
Pages (from-to)6098-6102
Number of pages5
JournalACS Applied Nano Materials
Issue number10
StatePublished - Oct 25 2019


  • 9-connected Zr nodes
  • MOFs
  • NH capture
  • low symmetry tricarboxylate ligand
  • uncoordinated carboxylate groups

ASJC Scopus subject areas

  • General Materials Science


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