Issue 22, 2019

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

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

Supplementary files

Article information

Article type
Paper
Submitted
21 mars 2019
Accepted
01 mai 2019
First published
08 mai 2019

CrystEngComm, 2019,21, 3415-3419

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, 21, 3415 DOI: 10.1039/C9CE00418A

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