Abstract
Transfer of dyes into micelles of nonionic surfactants from water was spectroscopically investigated. The used dyes were o- or p- hydroxy-2-styrylbenzo [a] quinolizium salts (azonia dyes) (I), such as A (OH), B (OH) and the methyl derivative of B (OH) such as C (OH) and their betain dyes (II), A (O-), B (O-), and C (O-). The transfer equilibrium constants of these dyes and their absorption spectra were determined in case of the double component system by the Principal Component Analytical method (abbreviated by PCA or PCM). A new analytical method was developed for the case of double component system but absence of isosbestic point. The obtained results by this method were compared with that reported in the preceding paper, calculated using only the data of the case of the double component system and presence of the isosbestic point. The results show that the azonia dyes (I) can more easily transfer into the micell than the betain dyes (II), because the equilibrium constants of the dye (I) were larger than that of the dye (II). The spectra of the dye (II) shifted more bathochromically in the micell than that of the dye (I), according to the hydrophobicity of inner micell.
