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  • Title: Spectral study of Eriochrome Blue Black R in different cationic surfactant solutions.
    Author: Zaghbani N, Dhahbi M, Hafiane A.
    Journal: Spectrochim Acta A Mol Biomol Spectrosc; 2011 Sep; 79(5):1528-31. PubMed ID: 21689968.
    Abstract:
    Interactions of anionic dye Eriochrome Blue Black R (EBBR) with various cationic micelles of surfactants n-alkyltrimethylammonium CnTAB (n=12; 14; 16 and 18) have been investigated spectrophotometrically at 25°C in premicellar and postmicellar region. The results have shown that with increasing the alkyl chain length of surfactants, the maximum absorbance of EBBR shifted to a higher wavelength and the binding constants of EBBR to cationic micelles (Kb) increases. This confirms that the surfactant micelle, which has a longer alkyl hydrocarbon chain, enables greater solubilization of dye. Thus, the hydrophobic interaction of the dye with micelles increases in the order: C12TAB<C14TAB<C16TAB<C18TAB.
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