Strategically placing secondary dialkyl-ammonium recognition sites at the magic distance of 3.5 Å apart in the dumbbell components of a series of oligorotaxanes (see picture) renders otherwise conformationally floppy [n]rotaxanes rigid and rodlike. These oligorotaxanes form with near-quantitative conversion under thermodynamic control using dynamic covalent chemistry.
- Dynamic covalent chemistry
- Mechanically interlocked molecules
- Molecular recognition
- Noncovalent bonding interactions
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