In a metal complex, a tin ion can be pushed and pulled through a flat macrocyclic ring with a scanning tunnelling microscope, allowing the molecule to act as a switch.
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Tao, N. Pushing the right button. Nature Chem 1, 108–109 (2009). https://doi.org/10.1038/nchem.194
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DOI: https://doi.org/10.1038/nchem.194
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