Gating the photochromism of an azobenzene by strong host-guest interactions in a divalent pseudo[2]rotaxane

Chem Commun (Camb). 2015 Jun 18;51(48):9777-80. doi: 10.1039/c5cc02811f.


The ability of an E-configured azobenzene guest to undergo photoisomerisation is controlled by the presence of a complementary host. Addition of base/acid allowed for a weakening/strengthening of the interactions in the divalent pseudo[2]rotaxane complex and hence could switch on/off photochromic activity.