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Effect of terbium(III) chloride on the micellization properties of sodium decyl- and dodecyl-sulfate solutions by A.C.S. Neves; A.J.M. Valente; H.D. Burrows; A.C.F. Ribeiro; V.M.M. Lobo is a Chemistry article available to read on EtoBox.

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The effect of TbCl 3 on the aggregation processes of the anionic surfactants sodium decyl sulfate (SDeS) and sodium dodecyl sulfate (SDS) has been investigated. Electrical conductivity data, combined with Tb(III) luminescence measurements suggest that the formation of micelles involving TbCl 3 and SDS occurs at concentrations below the critical micelle concentration (cmc) of the pure surfactants; the formation of these mixed aggregates was also monitored by light scattering, which indicates that the addition of TbCl 3 to surfactant concentration at values below the pure surfactant cmc results in a much greater light scattering than that found with pure sodium alkylsulfate surfactant micelles. This phenomenon is dependent upon the alkyl chain length of the surfactant. With Tb(III)/DS -, complexes are formed with a cation/anion binding ratio varying from 3 to 6, which depends upon the initial concentration of Tb(III). This suggests that the majority of the cation hydration water molecules can be exchanged by the anionic surfactant. When the carbon chain length decreases, interactions between surfactant and Tb(III) also decrease, alterations in conductivity and fluorescence data are n

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Author

A.C.S. Neves; A.J.M. Valente; H.D. Burrows; A.C.F. Ribeiro; V.M.M. Lobo

Publisher

Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)

Published

2007

Language

EN

Field

Chemistry (Physical Sciences)