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, Roland A. Fischer

Research output: Contribution to journalArticlepeer-review

84 Scopus citations

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.

Original languageEnglish
Article number346
JournalNature Communications
Volume10
Issue number1
DOIs
StatePublished - 1 Dec 2019

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