Fine-Tuning Conformational Motion of a Self-Assembled Metal–Organic Macrocycle by Multiple C[BOND]H⋅⋅⋅Anion Hydrogen Bonds


  • This project was supported by The Fundamental Research Funds for the Central Universities, and the Research Funds of Renmin University of China (No. 11XNL011), the National Natural Science Foundation of China (No. 91127039, 51073171, 21025207), and the Beijing Natural Science Foundation (No. 2112018).


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Anion switches: A bistable self-assembled metal–organic macrocycle undergoes intramolecular conformational motion that is switched reversibly with anions by multiple hydrogen-bonding interactions (see picture; Pd orange, N blue, O red). The molecular bowl fixed with a nitrate anion could be freed to a partial chair by adding a tetraphenylborate anion.