Journal
NATURE CHEMISTRY
Volume 7, Issue 6, Pages 526-531Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.2259
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Funding
- Engineering and Physical Sciences Research Council
- Engineering and Physical Sciences Research Council [EP/K039202/1, EP/J001325/1] Funding Source: researchfish
- EPSRC [EP/J001325/1, EP/K039202/1] Funding Source: UKRI
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Borromean rings or links are topologically complex assemblies of three entangled rings where no two rings are interlinked in a chain-like catenane, yet the three rings cannot be separated. We report here a metallacycle complex whose crystalline network forms the first example of a new class of entanglement. The complex is formed from the self-assembly of CuBr2 with the cyclotriveratrylene-scaffold ligand (+/-)-tris( iso-nicotinoyl) cyclotriguaiacylene. Individual metallacycles are interwoven into a two-dimensional chainmail network where each metallacycle exhibits multiple Borromean-ring-like associations with its neighbours. This only occurs in the solid state, and also represents the first example of a crystalline infinite chainmail two-dimensional network. Crystals of the complex were twinned and have an unusual hollow tubular morphology that is likely to result from a localized dissolution-recrystallization process.
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