Fig. 1
From: Reversible chromism of spiropyran in the cavity of a flexible coordination cage
Tripyridine- and triimidazole-based cages and their mechanical properties. a Synthesis of an octahedral cage 2 from tripyridine ligand 1 and a cis-blocked Pd acceptor33. b Synthesis of octahedral cage 4 from the same Pd precursor and triimidazole ligand34 3. c Quantifying the flexibility of cages 2 and 4: calculated distributions of Pd–Pd distances in 2 and 4 at room temperature
