Fig. 1. Schematic representations of solvent promoted solid-state molecular motion involving host-guest complexes and the 4D information coding the accompanying changes permit.

a An organic solvent, applied to the solid forms as either a liquid or vapour, promotes solid-state molecular motion and leads to transformation between co-crystalline phases, as well as production of mixed crystalline states and an amorphous form. Also shown by use of highlighting (light blue vs orange) is the time resolved colour response produced under both room light and UV illumination (365 nm). See text for further details. b 4D information coding via a solvent-induced time-dependent vapoluminescent response.