Transient Catenation in a Zirconium-Based Metal-Organic Framework and Its Effect on Mechanical Stability and Sorption Properties - PubMed (original) (raw)

. 2021 Jan 27;143(3):1503-1512.

doi: 10.1021/jacs.0c11266. Epub 2021 Jan 12.

Xinyi Gong 1 2, Austin M Evans 1, Florencia A Son 1, Xingjie Wang 1, Louis R Redfern 1, Megan C Wasson 1, Zoha H Syed 1 3, Zhijie Chen 1, Karam B Idrees 1, Timur Islamoglu 2, Massimiliano Delferro 3, William R Dichtel 1, François-Xavier Coudert 4, Nathan C Gianneschi 1 2 5, Omar K Farha 1 2 6

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Transient Catenation in a Zirconium-Based Metal-Organic Framework and Its Effect on Mechanical Stability and Sorption Properties

Lee Robison et al. J Am Chem Soc. 2021.

Abstract

Interpenetration of two or more sublattices is common among many metal-organic frameworks (MOFs). Herein, we study the evolution of one zirconium cluster-based, 3,8-connected MOF from its non-interpenetrated (NU-1200) to interpenetrated (STA-26) isomer. We observe this transient catenation process indirectly using ensemble methods, such as nitrogen porosimetry and X-ray diffraction, and directly, using high-resolution transmission electron microscopy. The approach detailed here will serve as a template for other researchers to monitor the interpenetration of their MOF samples at the bulk and single-particle limits. We investigate the mechanical stability of both lattices experimentally by pressurized in situ X-ray diffraction and nanoindentation as well as computationally with density functional theory calculations. Both lines of study reveal that STA-26 is considerably more mechanically stable than NU-1200. We conclude this study by demonstrating the potential of these MOFs and their mixed phases for the capture of gaseous _n_-hexane, used as a structural mimic for the chemical warfare agent sulfur mustard gas.

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