Abstract
Transformations between three-dimensional metallosupramolecular assemblies can enable switching between the different functions of these structures. Here we report a network of such transformations, based upon a subcomponent displacement strategy. The flow through this network is directed by the relative reactivities of different amines, aldehydes, and di(2-pyridyl)ketone. The network provides access to an unprecedented heteroleptic Cd6L6L′2 twisted trigonal prism. The principles underpinning this network thus allow for the design of diverse structural transformations, converting one helicate into another, a helicate into a tetrahedron, a tetrahedron into a different tetrahedron, and a tetrahedron into the new trigonal prismatic structure type. The selective conversion from one host to another also enabled the uptake of a desired guest from a mixture of guests.
Highlights
Transformations between three-dimensional metallosupramolecular assemblies can enable switching between the different functions of these structures
As different amines and aldehydes generate metal imine complexes that are more or less stable, the addition of new amines and aldehydes to existing structures can induce these structures to rearrange in well-defined ways through subcomponent substitution.[16]
We demonstrate the use of subcomponent displacement as an efficient method for bringing about structural transformations within a network of interconverting assemblies
Summary
Transformations between three-dimensional metallosupramolecular assemblies can enable switching between the different functions of these structures. The addition of bis-amine C (3 equiv) to 1a led to the formation of new helicate 2, releasing subcomponent B (Figures 1, S19−S26, and S88).
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