Fig. 20. (a) Binding of anionic guests in flexible DTE cage [Pd2o-494], (b) irradiation at 313 nm leads to closure of all photoswitches and generation of rigid [Pd2c-494] which causes guest ejection–irradiation at 617 nm reverses this process, (c) chiral guest R-camphor sulfonate transfers chirality to the first ligand that is switched from the open to the closed form. After this the guest is released, the other three ligands switch without stereochemical control.
