Abstract
The positron annihilation technique has been applied to study cyclodextrin complexes formation. Lifetime spectra have been measured in aqueous solutions of nitrophenol isomers, cyclodextrins, and cyclodextrins mixed with nitrophenol isomers. The spectra were resolved into three lifetime components. The intensity, I 3 , of the longest-lived component was found to be decreased linearly with respect to the concentration of nitrophenol isomers in an aqueous solution. In the aqueous solution of cyclodextrins, concentration had little effect on I 3 . However, I 3 increased with respect to the concentration of cyclodextrins in aqueous solutions mixed with a fixed amount of nitrophenol isomers
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