aggregation of non ionic surfactant igepal in aqueous solution fluorescence and light scattering studies在水溶液中聚合的非离子表面活性剂igepal荧光光散射研究.pdfVIP

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aggregation of non ionic surfactant igepal in aqueous solution fluorescence and light scattering studies在水溶液中聚合的非离子表面活性剂igepal荧光光散射研究.pdf

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aggregation of non ionic surfactant igepal in aqueous solution fluorescence and light scattering studies在水溶液中聚合的非离子表面活性剂igepal荧光光散射研究

Int. J. Mol. Sci. 2003, 4, 562-571 International Journal of Molecular Sciences ISSN 1422-0067 © 2003 by MDPI /ijms/ Aggregation of Non Ionic Surfactant Igepal in Aqueous Solution: Fluorescence and Light Scattering Studies Sujit Kumar Ghosh, Pijus Kanti Khatua and Subhash Ch. Bhattacharya* Department of Chemistry, Jadavpur University, Calcutta – 700032, India. Fax : 91(033) E-mail: sbjuchem@ * Corresponding author. Received: 5 June 2003 / Accepted: 14 October 2003 / Published: 25 October 2003 Abstract: The association of the polyoxyethylene nonyl phenol (Igepal) in aqueous solution has been studied. The results of the fluorescence quenching of 1-Anthracene sulphonate and Safranine T in nonionic micellar solution of Igepal have been presented. The quenching process was exploited to estimate the aggregation number of surfactant monomer. In the Igepal series the micellar aggregation number systematically varied. From the dynamic light scattering studies in micellar solution the polydispersity of the medium and the diameter of the micelles have been determined. The diameters of the micelles have been increased with increase in the molar mass of surfactants. A reasonable estimation of the surface area of the head group in different micelles has been attempted. Keywords: igepal, fluorescence, light scattering, aggregation, surface area. Introduction Photophysical processes may ex