An approach to MOFaxanes by threading ultralong polymers through metal–organic framework microcrystals

Tomoya Iizuka, Hiroyuki Sano, Benjamin Ouay, Nobuhiko Hosono () and Takashi Uemura ()
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Tomoya Iizuka: The University of Tokyo
Hiroyuki Sano: The University of Tokyo
Benjamin Ouay: The University of Tokyo
Nobuhiko Hosono: The University of Tokyo
Takashi Uemura: The University of Tokyo

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Mechanically interlocked architecture has inspired the fabrication of numerous molecular systems, such as rotaxanes, catenanes, molecular knots, and their polymeric analogues. However, to date, the studies in this field have only focused on the molecular-scale integrity and topology of its unique penetrating structure. Thus, the topological material design of such architectures has not been fully explored from the nano- to the macroscopic scale. Here, we propose a supramolecular interlocked system, MOFaxane, comprised of long chain molecules penetrating a microcrystal of metal–organic framework (MOF). In this study, we describe the synthesis of polypseudoMOFaxane that is one of the MOFaxane family. This has a polythreaded structure in which multiple polymer chains thread a single MOF microcrystal, forming a topological network in the bulk state. The topological crosslinking architecture is obtained by simply mixing polymers and MOFs, and displays characteristics distinct from those of conventional polyrotaxane materials, including suppression of unthreading reactions.

Date: 2023
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DOI: 10.1038/s41467-023-38835-5

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