Exploring inclusion complexes of ionic liquids with α- and β-cyclodextrin by NMR, IR, mass, density, viscosity, surface tension and conductance study

The formation of the host-guest inclusion complexes of ionic liquids namely [BMIm]CI and [HMIm]CI with alpha-CD and beta-CD were studied by means of physicochemical and spectroscopic methods. Conductivity and surface tension study were in good agreement with the 1H NMR and FT-IR studies which confirm the formation of the inclusion complexes. The Density and viscosity study also supported the formation of the ICs. Further the stoichiometry was determined 1:1 for each case and the association constants and thermodynamic parameters derived supported the most feasible formation of the [BMIm]Cl- beta-CD inclusion complex. (C) 2018 Elsevier B.V. All rights reserved.