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Tolerance of flexible MOFs toward repeated adsorption stress

: Bon, Volodymyr; Kavoosi, Negar; Senkovska, Irena; Kaskel, Stefan


ACS applied materials & interfaces 7 (2015), Nr.40, S.22292–22300
ISSN: 1944-8244
ISSN: 0013-936X
ISSN: 1944-8252
Fraunhofer IWS ()
adsorption stress; DUT-8(Ni); ELM-11; flexible metal-organic frameworks; InfraSORP; MIL-53(Al); SNU-9

The adsorption/desorption cyclability of four flexible MOFs, namely, MIL-53(Al), ELM-11, DUT-8(Ni), and SNU-9, was studied at 298 K using n-butane as adsorptive. The detailed analysis of thermal response curves, physisorption isotherm data, powder X-ray diffraction patterns, as well as SEM images revealed the highly stable switching performance of MIL-53(Al) and ELM-11 materials during 100 adsorption/desorption cycles. In contrast, for DUT-8(Ni) and SNU-9, the multiple adsorption/desorption stress leads to the reduction of crystallite size, causing changes in the switching behavior in the initial 10 physisorption runs, and a characteristic shift of the "gate-opening" pressure to higher values is observed.