Complex topologies in co-crystals are attracting the attention of the scientific community due to their often unique properties. However, the design, preparation, and control over the self-assembly process of these systems remain a challenging task. Here, we demonstrate a facile, solvent-free strategy to control the supramolecular trajectory of the self-assembly of a three-component crystalline adduct via mechanosynthesis; i.e., ball milling. Through modification of milling conditions, e.g., by choosing the number and size of milling balls, it is possible to switch topological selectivity between a non-interpenetrated and Borromean-type entanglement. These results pave the way for the controlled solvent-free synthesis of novel materials with complex topologies and unexplored functionalities.

Open versus Interpenetrated: Switchable Supramolecular Trajectories in Mechanosynthesis of a Halogen-Bonded Borromean Network

Catalano L.;Ursini M.;Cametti M.;Marti-Rujas J.;Metrangolo P.;Resnati G.;Terraneo G.
2021

Abstract

Complex topologies in co-crystals are attracting the attention of the scientific community due to their often unique properties. However, the design, preparation, and control over the self-assembly process of these systems remain a challenging task. Here, we demonstrate a facile, solvent-free strategy to control the supramolecular trajectory of the self-assembly of a three-component crystalline adduct via mechanosynthesis; i.e., ball milling. Through modification of milling conditions, e.g., by choosing the number and size of milling balls, it is possible to switch topological selectivity between a non-interpenetrated and Borromean-type entanglement. These results pave the way for the controlled solvent-free synthesis of novel materials with complex topologies and unexplored functionalities.
ball milling
borromean rings
crystal engineering
diiodoperfluoroalkanes
halogen bond
mechanochemistry
polymorph
SDG3: Good health and well-being
SDG7: Affordable and clean energy
SDG9: Industry, innovation, and infrastructure
self-assembly
solvent-free synthesis
supramolecular chemistry
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11311/1156179
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