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 journalArticle

22 Citations (Scopus)

Abstract

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
Pages (from-to)7238-7244
Number of pages7
JournalChemistry - A European Journal
Volume21
Issue number19
DOIs
Publication statusPublished - May 4 2015

Fingerprint

X ray crystallography
Amines
Adsorption
Molecules
Acids
Carbon Monoxide
Functional groups
Metals
Ligands
Single crystals
X ray diffraction
Water

Keywords

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

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Hu, X. L., Gong, Q. H., Zhong, R. L., Wang, X. L., Qin, C., Wang, H., ... Su, Z. M. (2015). Evidence of amine-CO2 interactions in two pillared-layer MOFs probed by X-ray crystallography. Chemistry - A European Journal, 21(19), 7238-7244. https://doi.org/10.1002/chem.201406495

Evidence of amine-CO2 interactions in two pillared-layer MOFs probed by X-ray crystallography. / Hu, Xiao Li; Gong, Qi Han; Zhong, Rong Lin; Wang, Xin Long; Qin, Chao; Wang, Hao; Li, Jing; Shao, Kui Zhan; Su, Zhong Min.

In: Chemistry - A European Journal, Vol. 21, No. 19, 04.05.2015, p. 7238-7244.

Research output: Contribution to journalArticle

Hu, XL, Gong, QH, Zhong, RL, Wang, XL, Qin, C, Wang, H, Li, J, Shao, KZ & Su, ZM 2015, 'Evidence of amine-CO2 interactions in two pillared-layer MOFs probed by X-ray crystallography', Chemistry - A European Journal, vol. 21, no. 19, pp. 7238-7244. https://doi.org/10.1002/chem.201406495
Hu, Xiao Li ; Gong, Qi Han ; Zhong, Rong Lin ; Wang, Xin Long ; Qin, Chao ; Wang, Hao ; Li, Jing ; Shao, Kui Zhan ; Su, Zhong Min. / Evidence of amine-CO2 interactions in two pillared-layer MOFs probed by X-ray crystallography. In: Chemistry - A European Journal. 2015 ; Vol. 21, No. 19. pp. 7238-7244.
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