Control of structural flexibility of layered-pillared metal-organic frameworks anchored at surfaces

Suttipong Wannapaiboon, Andreas Schneemann, Inke Hante, Min Tu, Konstantin Epp, Anna Lisa Semrau, Christian Sternemann, Michael Paulus, Samuel J. Baxter, Gregor Kieslich and Roland A. Fischer ()
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Suttipong Wannapaiboon: Technical University of Munich
Andreas Schneemann: Technical University of Munich
Inke Hante: Ruhr-University Bochum
Min Tu: Ruhr-University Bochum
Konstantin Epp: Technical University of Munich
Anna Lisa Semrau: Technical University of Munich
Christian Sternemann: Technische Universität Dortmund
Michael Paulus: Technische Universität Dortmund
Samuel J. Baxter: Georgia Institute of Technology
Gregor Kieslich: Technical University of Munich
Roland A. Fischer: Technical University of Munich

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Flexible metal-organic frameworks (MOFs) are structurally flexible, porous, crystalline solids that show a structural transition in response to a stimulus. If MOF-based solid-state and microelectronic devices are to be capable of leveraging such structural flexibility, then the integration of MOF thin films into a device configuration is crucial. Here we report the targeted and precise anchoring of Cu-based alkylether-functionalised layered-pillared MOF crystallites onto substrates via stepwise liquid-phase epitaxy. The structural transformation during methanol sorption is monitored by in-situ grazing incidence X-ray diffraction. Interestingly, spatially-controlled anchoring of the flexible MOFs on the surface induces a distinct structural responsiveness which is different from the bulk powder and can be systematically controlled by varying the crystallite characteristics, for instance dimensions and orientation. This fundamental understanding of thin-film flexibility is of paramount importance for the rational design of MOF-based devices utilising the structural flexibility in specific applications such as selective sensors.

Date: 2019
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DOI: 10.1038/s41467-018-08285-5

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