Selective CO2 uptake and inverse CO2/C2H2 selectivity in a dynamic bifunctional metal-organic framework

Wenbin Yang, Xiang Lin, Mikhail Suyetin, Ryotaro Matsuda, Alexander J. Blake, William Lewis, Julia E. Parker, Chiu C. Tang, Peter Hubberstey, Susumu Kitagawa, Hirotoshi Sakamoto, Elena Bichoutskaia, Neil R. Champness, Sihai Yang, Martin Schroeder

Research output: Contribution to journalArticlepeer-review

90 Citations (Scopus)

Abstract

The unique bifunctional porous metal–organic framework, [Co(HLdc)]·1.5MeOH·dioxane, incorporates both free-standing carboxyl and pyridyl groups within its pores. Gas adsorption measurements on the desolvated framework reveal unusual selective CO2 adsorption over C2H2 and CH4 linked to a framework phase change from a narrow pore (np) to a large pore (lp) form, mediated by CO2 uptake at 195 K. This phase transition has been monitored by in situ powder X-ray diffraction and IR spectroscopy, and modelled by Grand Canonical Monte Carlo simulations revealing that the reversible np to lp transition is linked to the rotation of pyridyl rings acting as flexible “pore gates”.
Original languageEnglish
Pages (from-to)2993-2999
JournalChemical Science
Volume10
Issue number3
DOIs
Publication statusPublished - 19 Jul 2012

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