Unraveling the Guest-Induced Switchability in the Metal-Organic Framework DUT-13(Zn)**

Research output: Contribution to journalResearch articleContributedpeer-review



The switching mechanism of the flexible framework Zn4O(benztb)(1.5) (benztb=N,N,N',N'-benzidine tetrabenzoate), also known as DUT-13, was studied by advanced powder X-ray diffraction (PXRD) and gas physisorption techniques. In situ synchrotron PXRD experiments upon physisorption of nitrogen (77 K) and n-butane (273 K) shed light on the hitherto unnoticed guest-induced breathing in the MOF. The mechanism of contraction is based on the conformationally labile benztb ligand and accompanied by a reduction in specific pore volume from 2.03 cm(3) g(-1) in the open-pore phase to 0.91 cm(3) g(-1) in the contracted-pore phase. The high temperature limit for adsorption-induced contraction of 170 K, determined by systematic temperature variation of methane adsorption isotherms, indicates that the DUT-13 framework is softer than other mesoporous MOFs like DUT-49 and does not support the formation of overloaded metastable states required for negative gas-adsorption transitions.


Original languageEnglish
Pages (from-to)9708-9715
Number of pages8
JournalChemistry - A European Journal
Issue number37
Publication statusPublished - 2 Jul 2021

External IDs

Scopus 85106264571



  • breathing metal-organic frameworks, DUT-13, flexibility, in&#8197, situ powder X-ray diffraction, POROUS COORDINATION POLYMERS, ADSORPTION, SIZE, TRANSITIONS, CRITERIA