title: Role of crystal size on swing-effect and adsorption induced structure transition of ZIF-8.
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.
authors.affiliation: Department of Chemical Engineering and Biotechnology, University of Cambridge, Pembroke St., Cambridge CB2 3RA, UK. df334@cam.ac.uk.
authors.forename: Tian
authors.initials: T
authors.lastname: Tian
authors.affiliation: Diamond Light Source Ltd., Diamond House, Harwell Science & Innovation Campus, Didcot, Oxon., OX11 0DE, UK.
authors.forename: Michael T
authors.initials: MT
authors.lastname: Wharmby
authors.affiliation: Instituto Nacional del Carbón, INCAR-CSIC, Oviedo, Spain.
authors.forename: José B
authors.initials: JB
authors.lastname: Parra
authors.affiliation: Instituto Nacional del Carbón, INCAR-CSIC, Oviedo, Spain.
authors.forename: Conchi O
authors.initials: CO
authors.lastname: Ania
authors.affiliation: Department of Chemical Engineering and Biotechnology, University of Cambridge, Pembroke St., Cambridge CB2 3RA, UK. df334@cam.ac.uk.
authors.forename: David
authors.initials: D
authors.lastname: Fairen-Jimenez