Evidence of amine-CO2 interactions in two pillared-layer MOFs probed by X-ray crystallography

Xiao Li Hu, Qi Han Gong, Rong Lin Zhong, Xin Long Wang, Chao Qin, Hao Wang, Jing Li, Kui Zhan Shao, Zhong Min Su

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


Two pillared-layer metal-organic frameworks (MOFs; PMOF-55 and NH2-PMOF-55) based on 1,2,4-triazole and terephthalic acid (bdc)/NH2-bdc ligands were assembled and display framework stabilities, to a certain degree, in both acid/alkaline solutions and toward water. They exhibit high CO2 uptakes and selective CO2/N2 adsorption capacities, with CO2/N2 selectivity in the range of 24-27, as calculated by the ideal adsorbed solution theory method. More remarkably, the site and interactions between the host network and the CO2 molecules were investigated by single-crystal X-ray diffraction, which showed that the main interaction between the CO2 molecules and PMOF-55 is due to multipoint supramolecular interactions of C-H⋯O, C⋯O, and O⋯O. Amino functional groups were shown to enhance the CO2 adsorption and identified as strong adsorption sites for CO2 by X-ray crystallography.

Original languageEnglish (US)
Pages (from-to)7238-7244
Number of pages7
JournalChemistry - A European Journal
Issue number19
StatePublished - May 4 2015

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Organic Chemistry


  • X-ray diffraction
  • adsorption
  • carbon dioxide
  • metal-organic frameworks
  • pillared-layer


Dive into the research topics of 'Evidence of amine-CO2 interactions in two pillared-layer MOFs probed by X-ray crystallography'. Together they form a unique fingerprint.

Cite this