Interaction of 1-anthracene sulphonate with cationic micelles of alkyl trimethyl ammonium bromides (C_nTAB): A spectroscopic study

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• 作者：Arindam Sarkar ; Smritimoy Pramanik ; Paltu Banerjee ; S.C. Bhattacharya
• 关键词：Fluorescence ; Micelle ; Distribution ; Quenching ; Lifetime
• 刊名：Colloids and Surfaces A: Physicochemical and Engineering Aspects
• 出版年：2008
• 出版时间：20 March 2008
• 年：2008
• 卷：317
• 期：1-3
• 页码：585-591
• 全文大小：490 K

文摘

The emission properties of 1-anthracene sulphonate (1-AS) have been studied in cationic micellar media of alkyl trimethyl ammonium bromides (C_nTAB) of varying chain lengths. The changes in the emission characteristics as a function of surfactant concentration have been utilized to determine the binding constant of the probe with the micelles and location of the probe within these micelles. The interactions of 1-AS with the cationic micelles depend on the hydrophobic chain length of the cationic surfactants. The binding constants of 1-AS with C_nTAB micelles decrease with decreasing n. The fluorescence of 1-AS is quenched by cetyl pyridinium chloride (CpCl) at the surface of the cationic micelles. The rate of fluorescence quenching decreases with decrease in alkyl chain length of the cationic surfactants.