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Keywords:

  • anion recognition;
  • cage compounds;
  • host–guest systems;
  • photoswitches;
  • supramolecular chemistry
Thumbnail image of graphical abstract

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−.