Physicochemical characterization of reverse micelles of Triton X using 1-anthracene sulphonate as fluorescent probe: A spectroscopic study

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Vol. 349; no. 1; pp. 117 - 124
• Main Authors: Dhar, Sayaree, Rana, Dipak Kumar, Sarkar, Arindam, Mandal, Tapas Kumar, Ghosh, Somnath, Bhattacharya, Subhash Chandra
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 05.10.2009; Elsevier
• Subjects: Binding constant; Chemistry; cmc; Colloidal state and disperse state; Exact sciences and technology; General and physical chemistry; Interfacial pH; Micelles. Thin films; NMR technique; Solvent parameter; Surface physical chemistry; NMR technique; cmc; Solvent parameter; Interfacial pH; Binding constant; Binding; Anthracene; Correlation; Hydrocarbon; Chloroform; Ether; Association constant; NMR spectrometry; Binding constant cmc; Tricyclic compound; Surfactant; Condensed benzenic compound; Free energy; Aggregation; Characterization; Fluorophore; pH; Polarity; Thermodynamic properties; Reverse micelle; Micellization
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2009.08.004

The aggregation of surfactant of polyoxyethylene-p-(1,1,3,3-tetramethylbutyl)phenyl ether (Triton X) series in chloroform has been studied. The critical micellar concentration (cmc) of the reverse micelles formed has been determined by four different techniques. The determined cmc values by various techniques are close to each other and facilitate determination of the free energy change (Δ G) values associated with the micellization. From the correlation of cmc with hydrophile–lipophile balance (HLB) it was found that cmc decreases with decrease in HLB values. The association constant of the reverse micelle with fluorescent probe 1-anthracene sulphonate (1-AS) and micellar aggregation number has been evaluated. The location of the fluorophore in the reverse micelle and the polarity of the micelle solubilized sites have been determined from the E T(30), Kosower Z, and dielectric constant values. The pH of the aqueous region of reverse micelles has been estimated by comparison method.