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A new dynamic framework with direct in situ visualisation of breathing under CO2 gas pressure

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Abstract

Using in situ single-crystal X-ray diffraction analysis (SCD), direct structural evidence has been obtained for breathing behaviour of a new flexible MOF COB1. Desolvation of the as-synthesised material results in deformation of the coordination geometries due to flexibility of the bridging ligands, and the framework is capable of switching from a wide-pore to a narrow-pore form, with substantial reduction in guest-accessible volume. Upon exposure to CO2 gas the activated framework breathes and switches back to the wide-pore phase. This breathing behaviour is supported by gas sorption analysis, pressure-gradient differential scanning calorimetry, powder X-ray diffraction analysis and molecular modelling.

Graphical abstract: A new dynamic framework with direct in situ visualisation of breathing under CO2 gas pressure

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Publication details

The article was received on 21 Mar 2019, accepted on 01 May 2019 and first published on 08 May 2019


Article type: Paper
DOI: 10.1039/C9CE00418A
CrystEngComm, 2019, Advance Article

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    A new dynamic framework with direct in situ visualisation of breathing under CO2 gas pressure

    P. Sikiti, C. X. Bezuidenhout, D. P. van Heerden and L. J. Barbour, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C9CE00418A

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