Aggregation and micelle formation of ionic liquids in aqueous solution
CHEMICAL PHYSICS LETTERS, cilt.400, ss.296-300, 2004 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 400
- Basım Tarihi: 2004
- Doi Numarası: 10.1016/j.cplett.2004.10.127
- Dergi Adı: CHEMICAL PHYSICS LETTERS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.296-300
- Marmara Üniversitesi Adresli: Evet
Özet
Association of ionic liquids possessing n-octyl moiety either in the cation or in the anion has been studied in aqueous solution with conductivity and turbidity measurements as well as using 2-hydroxy-substituted Nile Red solvatochromic probe. 1-Butyl-3methylimidazolium octyl sulfate was found to act as a surfactant above 0.031 M critical micelle concentration. In contrast, 1-methyl-3-octylimidazolium chloride produced inhomogeneous solution of larger aggregates, which were dissolved on the addition of more than 2:1 molar excess of sodium dodecyl sulfate (SDS) due to mixed micelle formation. Even small amount (<10 mM) of ionic liquids could markedly reduce the polarity of the Stern layer of SDS micelle. (C) 2004 Elsevier B.V. All rights reserved.