The study of Sunset Yellow anionic dye interaction with gemini and conventional cationic surfactants in aqueous solution

Sara Fazeli, Beheshteh Sohrabi*, Ali Reza Tehrani-Bagha

*Corresponding author for this work

Research output: Contribution to journalReview Articlepeer-review

32 Citations (Scopus)

Abstract

In the present study, the interaction of an anionic azo dye, Sunset Yellow, with two cationic gemini surfactants with different spacer lengths (s = 3, 6 methylene groups) and their monomeric counterpart, dodecyl trimethyl ammonium bromide (DTAB), was investigated by surface tension, UV-Vis spectroscopy, and zeta potential measurements. The critical micelle concentration (CMC) was determined from plots of the surface tension (γ) as a function of the logarithm of total surfactant concentration. Moreover, the values of binding constants (Kb) of dye-surfactant complexes were calculated by UV-Vis spectroscopy. The UV-Vis spectra showed that the dye-surfactant interaction occurred in the solution at concentrations far below the CMC of each surfactant. The gemini surfactant with a shorter spacer showed stronger interaction with dye in comparison to DTAB and the gemini with longer spacer. The effect of surfactant chemical structure on solubilization of dye-surfactant aggregates at surfactant concentration above CMC was investigated by zeta potential.

Original languageEnglish
Pages (from-to)768-775
Number of pages8
JournalDYES AND PIGMENTS
Volume95
Issue number3
DOIs
Publication statusPublished - Dec 2012
MoE publication typeA2 Review article in a scientific journal

Keywords

  • Anionic dye
  • Cationic gemini surfactant
  • Dye-surfactant complexes
  • Dye-surfactant interaction
  • UV-Vis spectroscopy
  • Zeta potential

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