@article{13369,
  abstract     = {Arylazopyrazoles represent a new family of molecular photoswitches characterized by a near-quantitative conversion between two states and long thermal half-lives of the metastable state. Here, we investigated the behavior of a model arylazopyrazole in the presence of a self-assembled cage based on Pd–imidazole coordination. Owing to its high water solubility, the cage can solubilize the E isomer of arylazopyrazole, which, by itself, is not soluble in water. NMR spectroscopy and X-ray crystallography have independently demonstrated that each cage can encapsulate two molecules of E-arylazopyrazole. UV-induced switching to the Z isomer was accompanied by the release of one of the two guests from the cage and the formation of a 1:1 cage/Z-arylazopyrazole inclusion complex. DFT calculations suggest that this process involves a dramatic change in the conformation of the cage. Back-isomerization was induced with green light and resulted in the initial 1:2 cage/E-arylazopyrazole complex. This back-isomerization reaction also proceeded in the dark, with a rate significantly higher than in the absence of the cage.},
  author       = {Hanopolskyi, Anton I and De, Soumen and Białek, Michał J and Diskin-Posner, Yael and Avram, Liat and Feller, Moran and Klajn, Rafal},
  issn         = {1860-5397},
  journal      = {Beilstein Journal of Organic Chemistry},
  keywords     = {Organic Chemistry},
  pages        = {2398--2407},
  publisher    = {Beilstein Institut},
  title        = {{Reversible switching of arylazopyrazole within a metal–organic cage}},
  doi          = {10.3762/bjoc.15.232},
  volume       = {15},
  year         = {2019},
}