We report a flexible metal-organic framework, [Co2(OBA)2(BPMP)]n (COB), with a new network topology. COB displays structural flexibility under CO2 gas pressure at 298 K, and the resultant porous phases have been characterized by in situ X-ray diffraction analysis. We show that activation yields a framework with discrete voids and substantial reduction in guest-accessible volume. Single-crystal X-ray diffraction analysis under controlled CO2 pressure shows that COB exhibits a breathing mode of flexibility, combined with an overall swelling of the framework. This combination of mechanisms is highly unusual.
Sikiti, P., Bezuidenhout, C., Van Heerden, D., Barbour, L. (2019). Direct in Situ Crystallographic Visualization of a Dual Mechanism for the Uptake of CO2 Gas by a Flexible Metal-Organic Framework. INORGANIC CHEMISTRY, 58(13), 8257-8262 [10.1021/acs.inorgchem.9b00761].
Direct in Situ Crystallographic Visualization of a Dual Mechanism for the Uptake of CO2 Gas by a Flexible Metal-Organic Framework
Bezuidenhout C.Secondo
;
2019
Abstract
We report a flexible metal-organic framework, [Co2(OBA)2(BPMP)]n (COB), with a new network topology. COB displays structural flexibility under CO2 gas pressure at 298 K, and the resultant porous phases have been characterized by in situ X-ray diffraction analysis. We show that activation yields a framework with discrete voids and substantial reduction in guest-accessible volume. Single-crystal X-ray diffraction analysis under controlled CO2 pressure shows that COB exhibits a breathing mode of flexibility, combined with an overall swelling of the framework. This combination of mechanisms is highly unusual.
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