The solubilization of amphiphilic hemicyanine dyes i.e., [1] (Dimethylamino) stilbazolium butyl sulfonate, [2] (Dihexylamino) stilbazolium butyl sulfonate, into micelles of an anionic surfac ant, sodium dodecyl benzene sulfonate (SDBS), was studied as a function of SDBS concentration above the critical micelle concentration. The micelle-water partition coefficient, K-x, and the standard free energy change of solubilization, Delta G(p) degrees, of the dyes in SDBS micelles were determined at 25.0 degrees C by a differential spectroscopic method. The solubilization of more hydrophobic dye in micelles was greater than the less hydrophobic dye.
M A KHAN ,S S SHAH ,
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