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Rich aggregate morphologies induced by organic salts in aqueous solutions of a cationic gemini surfactant with a short spacer

Authors
Journal
Journal of Colloid and Interface Science
0021-9797
Publisher
Elsevier
Publication Date
Volume
340
Issue
1
Identifiers
DOI: 10.1016/j.jcis.2009.08.023
Keywords
  • Rich Aggregate Morphologies
  • Gemini Surfactant With A Short Spacer
  • Organic Sulfonate Salt
Disciplines
  • Mathematics

Abstract

Abstract Various aggregates, such as spherical and elongated micelles, tubular and rodlike aggregates, as well as vesicles, are induced by adding sodium 2-naphthalenesulfonate (SNphs) or sodium benzenesulfonate (SBzs) into the aqueous solution of a gemini surfactant C 12C 2C 12(Me) (1,2-ethanediyl-bis-(dodecyldimethylammonium bromide)). The aggregate morphology strongly depends on the added amount of the organic salts. Among the various aggregates, the elongated micelle and the tubular aggregate have larger solubilizing capacities than those with the other morphologies. However, SNphs and SBzs cannot induce similar aggregate transitions for the systems of C 12C s C 12(Me) ( s = 6, 8, 12). The possible mechanism of these phenomena is proposed based on the results of UV spectra and 1H NMR measurements and the molecular packing geometry rule.

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