Studies on the Solubilizing Location of Brilliant Yellow in CTAB Micellar Solution

Abstract

Abstract: In this paper, the formation of the premicella and the transformation of the premicella to micella for brilliant yellow(BY) in the water solution of cetytrimethylammonium bromide (CTAB)were studied with UVabsorption spectra.With the Gouy-Chapman model, the relation between the change of BY's apparent dissociation constant(△PK^m) and the micellar structure parameters was set up.According to the dissociation constants of BYmeasured in water solution and in CTABmicellar solutions with different concentrations of salt,the distances between BYand the surface of the micella were determined, which were used to demonstrate the solubilizing location of BYin CTAB micella and to characterize the property of CTAB micella adsorbing BY anions.

Key words: Micelle, UV-visible absorption spectra, cetyltrimethylammonium bromide, Brilliant yellow

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ZHANG Yun-Hong, LIANG Ying-Qiu. Studies on the Solubilizing Location of Brilliant Yellow in CTAB Micellar Solution[J]. Chem. J. Chinese Universities, 1994, 15(2): 266.

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Studies on the Solubilizing Location of Brilliant Yellow in CTAB Micellar Solution

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