Journal
NATURE CHEMISTRY
Volume 7, Issue 4, Pages 354-358Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.2205
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Funding
- UK Engineering and Physical Sciences Research Council (EPSRC)
- Marie Curie fellowship [ITN-2010-264645]
- Engineering and Physical Sciences Research Council [EP/J001163/1, EP/I005447/1] Funding Source: researchfish
- EPSRC [EP/I005447/1, EP/J001163/1] Funding Source: UKRI
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Interlocked molecules possess properties and functions that depend upon their intricate connectivity. In addition to the topologically trivial rotaxanes, whose structures may be captured by a planar graph, the topologically non- trivial knots and catenanes represent some of chemistry's most challenging synthetic targets because of the three-dimensional assembly necessary for their construction. Here we report the synthesis of a cyclic [3] catenane, which consists of three mutually interpenetrating rings, via an unusual synthetic route. Five distinct building blocks self-assemble into a heteroleptic triangular framework composed of two joined (Fe3L3)-L-II circular helicates. Subcomponent exchange then enables specific points in the framework to be linked together to generate the cyclic [3] catenane product. Our method represents an advance both in the intricacy of the metal-templated self-assembly procedure and in the use of selective imine exchange to generate a topologically complex product.
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