Flexible ZIFs - probing guest-induced flexibility with CO2 , N2 and Ar adsorption

Noguera-Díaz, Antonio and Villarroel-Rocha, Jhonny and Ting, Valeska P and Bimbo, Nuno and Sapag, Karim and Mays, Timothy J (2019) Flexible ZIFs - probing guest-induced flexibility with CO2 , N2 and Ar adsorption. Journal of Chemical Technology and Biotechnology, 94 (12). pp. 3787-3792. ISSN 0268-2575

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Abstract

Background The effect of framework topology on the guest‐induced flexibility of several crystalline zeolitic imidazolate frameworks (ZIF‐7, ZIF‐9, ZIF‐11 and ZIF‐12) was investigated via analysis of experimental N2, CO2 and Ar isotherms at 77 K (N2 and Ar) and 273 K (CO2) for gas pressures up to 0.13 MPa. Results The experimental isotherms were analysed in order to investigate structural flexibility of these materials using gases with kinetic diameters equal to or larger than the diameters of their static pore apertures. The results of gas sorption measurements indicate guest‐induced phase changes for ZIF‐7 and ZIF‐9 (SOD topologies). ZIF‐12 (RHO topology) also shows uptake for gases, despite its pore limiting diameter being smaller than the kinetic diameters of the adsorbed molecules. Conclusions This work highlights the ability of ZIFs with different framework topologies to change their structure and increase their pore aperture upon interaction with certain gases. These findings are key in the development of more selective ZIF‐based materials for important industrial applications including low‐energy gas separations, catalytic nanoreactors and sensor technology.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Chemical Technology and Biotechnology
Additional Information:
This is the peer reviewed version of the following article: Noguera‐Díaz, A. , Villarroel‐Rocha, J. , Ting, V. P., Bimbo, N. , Sapag, K. and Mays, T. J. (2019), Flexible ZIFs: probing guest‐induced flexibility with CO2, N2 and Ar adsorption. Journal of Chemical Technology & Biotechnology . doi: 10.1002/jctb.5947 which has been published in final form at https://onlinelibrary.wiley.com/doi/full/10.1002/jctb.5947 This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2100/2105
Subjects:
ID Code:
130913
Deposited By:
Deposited On:
29 Jan 2019 12:05
Refereed?:
Yes
Published?:
Published
Last Modified:
26 Sep 2020 05:48