Electrochemical Study of the Effect of Temperature in Surfactant- β-Cyclodextrin Complex Formation in the Presence of Polyvinylpyrrolidone (PVP)

β-Cyclodextrin (β-CD) is a cyclic oligosaccharide consisting of seven glucose units linked via α- 1-4 glycosidic bonds that is able to form inclusion complexes with a variety of neutral and charged organic molecules in aqueous solutions, mainly via hydrophobic interactions [1,2].In an aqueous solution, the slightly apolar cyclodextrin cavity is occupied by water molecules, which are energetically unfavored (polar- apolar interaction) and therefore can be readily substituted by appropriate guest molecules which are less polar than water. The driving force of the complex formation is the substitution of the high enthalpy water molecules by an appropriate guest molecule[3-5].A wide variety of experimental methods have been employed for study of the complexation between CDs and guest molecules. These include microcalorimetry, UV- VIS spectroscopy, potentiometry,vapor pressure, surface tension, conductometry [6-11], etc.