An unexpected relationship between solvent inclusion and gas sorption properties of chiral calixsalen solids

Experimental evidence is provided that tentatively shows a relationship between inclusion and sorption properties within a series of halogenated homochiral calixsalens. Calixsalens with Cl and Br substituents at the C5 position on the aromatic rings display remarkable sorption properties for all of the investigated gases, as well as the ability to form inclusion compounds with chemically different solvents, while unsubstituted (H-) and F-substituted calixsalens do not show any of these properties.