Cation complexing 2-O-alkylated, 3,6-anhydro-α-cyclodextrins: the side-chain length governs physicochemical properties and practical applications

A series of chain-grafted per-3,6-anhydro-a-cyclodextrins (ACD) were synthesized and their cation complexing properties studied by 1 H-NMR spectroscopy. Superficial tension measurements, 1 H-NMR spectroscopy and phase diagrams showed that the properties of ACD were closely related to LogP, which also controlled their interactions with membranes. As a result, practical applications could be proposed and further perspectives suggested. Hence direct decontamination in liquids may be possible for most amphiphilic derivatives, since these amphiphilic molecules form gels or soaps. The most hydrophobic derivative O36 realizes an insoluble complex that can be used for depollution or cation dosages in liquids.