Interaction of anionic dyes and cationic surfactants with ionic liquid character

Journal of Colloid and Interface Science
A SafaviS Zeinali

Abstract

The interactions of an imidazolium based ionic liquid (IL), namely 1-dodecyl-3-methylimidazolium chloride [C12 mim][Cl] with two sulfonated anionic dyes, azocarmine G and methyl orange, are studied spectrophotometrically in both acidic and basic media. ILs (with some surface active character) can interact with the above dyes and cause considerable shifts in their spectra. These interactions are then compared with some surfactant-dye interactions. Evolving factor analysis (EFA) and multivariate curve resolution-alternating least squares (MCR-ALS) are used for complete resolution of the measured spectrophotometric data. The concentration and spectral profiles of all species were calculated without any assumption of the chemical models. The spectral variation of dye solutions as a function of IL concentrations below and above the critical aggregation concentration (CAC) is analyzed using MCR-ALS as a soft-modeling technique. The ion pair formation constants between ILs and dyes were calculated using the obtained concentration profiles.

References

Mar 4, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·James BowersJohn R P Webster
Apr 20, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·James BowersRichard K Heenan
May 25, 2005·The Analyst·Gary A BakerFrank V Bright
Jan 16, 2007·Journal of Colloid and Interface Science·Ian GoodchildRichard K Heenan
Jan 26, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Hamid Abdollahi, Vahideh Mahdavi
Mar 9, 2007·Journal of Colloid and Interface Science·Geir Martin Førland, Anne Marit Blokhus

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