Despite recent advances in the synthesis of increasingly complex topologies at the molecular level, nano- and microscopic weaves have remained difficult to achieve. Only a few diaxial molecular weaves exist—these were achieved by templation with metals. Here, we present an extended triaxial supramolecular weave that consists of self-assembled organic threads. Each thread is formed by the self-assembly of a building block comprising a rigid oligoproline segment with two perylene-monoimide chromophores spaced at 18 Å. Upon π stacking of the chromophores, threads form that feature alternating up- and down-facing voids at regular distances. These voids accommodate incoming building blocks and establish crossing points through CH–π interactions on further assembly of the threads into a triaxial woven superstructure. The resulting micrometre-scale supramolecular weave proved to be more robust than non-woven self-assemblies of the same building block. The uniform hexagonal pores of the interwoven network were able to host iridium nanoparticles, which may be of interest for practical applications.
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The authors acknowledge the VW Foundation for financial support and the ETH Scientific Center for Optical and Electron Microscopy (ScopeM) for support. The authors also acknowledge Beamline 9 of the DELTA electron storage ring in Dortmund for providing synchrotron radiation and technical support for GIWAXS measurements. The authors thank D. Schlüter for discussions and J. Schnabl for the illustration of the supramolecular weave.
The authors declare no competing financial interests.
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Lewandowska, U., Zajaczkowski, W., Corra, S. et al. A triaxial supramolecular weave. Nature Chem 9, 1068–1072 (2017). https://doi.org/10.1038/nchem.2823
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