Abstract

The densities and viscosities of paracetamol in aqueous b-cyclodextrin solutions with several molal concentrations
m = (0.001-0.007) mol kg−1 of b-cyclodextrin were determined at T = 298.15-318.15 K under atmospheric
pressure. The inclusion has been studied using ultraviolet-visible spectroscopy. Using experimental data
apparent molar volume (φV), standard partial molar volume ( 0
Vφ ), the slope ( SV
* ), standard isobaric partial
molar expansibility ( φE
0 ) and its temperature dependence (∂φ ∂E
0
PT ) , the viscosity B-coefficient, and solvation
number (Sn) were determined. Free energies of activation of viscous flow per mole of the solvents ( ∆μ ≠
1
0 ) and the
solute ( ∆μ ≠
2
0 ) are also calculated. Various results revealed that the solutions are characterized predominantly by
solute-solvent interactions and paracetamol behaves as a long-range structure maker.