Solubilization of new calix[4]resorcinols with amino acid substituents at the upper rim in surfactant micellar solutions

A spectrophotometric method was used to select conditions for the development of aqueous systems based on new calix[4]resorcinols containing amino acid moieties at the upper rim and heptyl or nonyl substituents at the lower rim. It was found that the additives of N-metylglucamine lead to the increase in the solubility in water of the macrocycles under study. Traditional surfactants (cetyltrimetylammonium bromide and sodium dodecylsulfate) considerably increase the solubility of calix[4]resorcinols under study due to their solubilization in the nonpolar micelle core when the concentration of the amphiphilic compounds is half as large as the concentration of N-metylglucamine.