A [2]catenane-based receptor functionalized with stiff-stilbene can be reversibly switched with 340/385 nm light between its Z- and E-isomers, which leads to a considerable change in chloride binding affinity. Photoisomerization in the presence of chloride allows for in situ on demand guest uptake and release.
![Graphical abstract: A photoswitchable [2]catenane receptor](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D4CC05934D&imageInfo.ImageIdentifier.Year=2025)
J. de Jong, M. A. Siegler and S. J. Wezenberg, Chem. Commun., 2025, 61, 2548 DOI: 10.1039/D4CC05934D
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