Role of crystal size on swing-effect and adsorption induced structure transition of ZIF-8.
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Authors
Tian, Tian
Wharmby, Michael T
Parra, José B
Ania, Conchi O
Fairen-Jimenez, David
Abstract
The flexibility and structure transition behaviour of ZIF-8 in a series of samples with different particle size has been studied using a combination of high-resolution N2 gas adsorption isotherms and, for the first time, a broad in situ PXRD and Rietveld analysis. During the stepped adsorption process, large particles showed a narrow adsorption/desorption pressure range with a shorter equilibrium time due to lower kinetic hindrance, deriving from higher amount of active sites. In situ PXRD showed that both the rotation of imidazole ring and a bend in the methyl group led to the gate opening of ZIF-8.
Description
Keywords
0306 Physical Chemistry (incl. Structural)
Journal Title
Dalton Trans
Conference Name
Journal ISSN
1477-9226
1477-9234
1477-9234
Volume Title
Publisher
Royal Society of Chemistry (RSC)
Publisher DOI
Sponsorship
This work was funded by the EPSRC IAA Partnership Development Award (RG/75759). D.F.-J. thanks the Royal Society for funding through a University Research Fellowship. We thank Diamond Light Source for beamtime at beamline I11 (visit EE9750).