Inclusion Complexes of β-Cyclodextrin/Pioglitazone and β-Cyclodextrin-Ionic Liquid/Pioglitazone: Spectroscopic Methods Combined with Molecular Docking Studies

The complexes of β-cyclodextrin/pioglitazone and β-cyclodextrin-ionic liquid/pioglitazone were prepared by kneading method. Characterization using FT-IR, thermogravimetric analysis and NMR had proven the formation of the complexes. From 1H NMR determination, pioglitazone is proven to form hydrogen bonding and inclusion complex with native β-cyclodextrin and β-cyclodextrin-ionic liquid. The molecular docking also reveals the same interaction involved for the formation of complexes β-cyclodextrin/pioglitazone and β-cyclodextrin-ionic liquid/pioglitazone. The binding energy obtained from molecular studies for the complex of β-cyclodextrin-ionic liquid/pioglitazone is higher than the binding energy of β-cyclodextrin/pioglitazone. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.