Infrared spectra of the surface of silica immersed in a three-component liquid mixture

Abstract

I.r. spectra have been measured of silica immersed in heptane–toluene–acetone liquid mixtures and three i.r. bands which could be distinguished were assigned to surface silanol groups perturbed by interactions with heptane, toluene, or acetone molecules; the proportion of silanol groups perturbed by the adsorption of each component of the liquid mixture could be deduced from absorbance data and the method provides a novel technique for the study of adsorption from three-component liquid mixtures.