Abstract
We report on multicomponent self-sorting to form open circular helicates of different sizes from a primary monoamine, FeII ions, and dialdehyde ligand strands that differ in length and structure by only two oxygen atoms. The corresponding closed circular helicates that are formed from a diamine—a molecular Solomon link and a pentafoil knot—also self-sort, but up to two of the Solomon-link-forming ligand strands can be accommodated within the pentafoil knot structure and are either incorporated or omitted depending on the stage that the components are mixed.
Highlights
We report on multicomponent self-sorting to form open circular helicates of different sizes from a primary monoamine, FeII ions, and dialdehyde ligand strands that differ in length and structure by only two oxygen atoms
We recently described the synthesis of a molecular Solomon link[8] and a molecular pentafoil knot,[10] each formed through a combination of metal–ligand coordination, an anion template, and geometric restrictions
These closely related structures are derived from tetra-[8] and pentameric[10] circular helicate scaffolds, respectively, and are assembled from up to 20 common, or similar, components
Summary
We report on multicomponent self-sorting to form open circular helicates of different sizes from a primary monoamine, FeII ions, and dialdehyde ligand strands that differ in length and structure by only two oxygen atoms. The dynamics of this self-sorting system were further probed through experiments in which dialdehydes 1 and 2 were mixed at different points during the course of the reaction and monitored for up to four days at different concentrations (see the Supporting Information), which established that under these conditions the open circular helicates self-assemble and self-sort under thermo-
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