title: Spectral study of Eriochrome Blue Black R in different cationic surfactant solutions.
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.
authors.affiliation: Centre de Recherche et des Technologies des Eaux (CERTE), BP 273, Soliman 8020, Tunisia. zaghbani_narjess@hotmail.com
authors.forename: Narjess
authors.initials: N
authors.lastname: Zaghbani
authors.forename: Mahmoud
authors.initials: M
authors.lastname: Dhahbi
authors.forename: Amor
authors.initials: A
authors.lastname: Hafiane
mesh_terms: D000838:Anions / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry*; D002412:Cations / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008823:Micelles; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D000838:Anions; D001391:Azo Compounds; D002412:Cations; D004396:Coloring Agents; D008823:Micelles; D000644:Quaternary Ammonium Compounds; D013501:Surface-Active Agents