Fig. 3: X-ray crystallographic structures of host-guest complexes.
From: Charge-transfer complexation of coordination cages for enhanced photochromism and photocatalysis
a Structure of I−⊂1 in 1-I. b Structure of Br−⊂1 in 1-Br. The imploded viologen ligand is colored cyan. c Structure of Br−⊂1• in 1•-Br and the structure parameters of the three viologen units showing the radical state of the cage.
