Light-Triggered Guest Uptake and Release by a Photochromic Coordination Cage


  • M.H. thanks the CaSuS program of Lower Saxony for a PhD fellowship. We thank the Fonds der Chemischen Industrie for financial support, R. Machinek and Prof. Dr. C. Griesinger for NMR measurements, and Dr. H. Frauendorf for ESI measurements. ChemMatCARS Sector 15 is principally supported by the National Science Foundation/Department of Energy under grant No. NSF/CHE-0822838. Use of the Advanced Photon Source was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Contract No. DE-AC02-06CH11357.


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A guiding light is sufficient to switch back and forth between the flexible and the stretched, rigid form of a self-assembled coordination cage based on two square-planar-coordinated PdII ions and four ligands with a photochromic dithienylethene (DTE) backbone. The light-driven interconversion is clean and reversible and allows to control the encapsulation and release of the guest [B12F12]2−.