The effect of the dielectric constant of a solvent on the development of the association of dye molecules

The effect of the dielectric constante of the solvent on the association of molecules of the dye rhodamine-6G was studied by means of elec­ tron and vibration absorption spectra. It is shown that under otherwise equal conditions a reduction in the e of the medium leads to a rein­ forcement of the association of dye molecules. This coofirms the cor­ rectness of the assumption that in concentrated solutions there is an amalgamation of ion pairs of the dye.