Complex formation study of hemicyanine dyes with sodium dodecyl sulfate by differential spectroscopy

Shah, Syed Waqar Hussain; Naeem, Kashif; Naseem, Bushra

doi:10.1016/j.colsurfa.2008.08.009

Cited by 24 publications

(11 citation statements)

References 28 publications

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“…This property has been utilized in the spectrophotometric determination of metal ions and to improve spectral characteristics of colored systems. Several researchers have studied a range of dyes to study the aggregation behavior of the ionic surfactants [85][86][87][88][89]. The aggregation behavior of SDS, in a range of RTILs with varied alkyl chain lengths ranging from methyl to octyl, was studied using 8ANS as the dye [27].…”

Section: Spectral Change Of Dye By Uv-vis Measurementmentioning

confidence: 99%

Effect of [C n mim][Br] Based Ionic Liquids on the Aggregation Behavior of Tetradecyltrimethylammonium Bromide in Aqueous Medium

Vaid

Bhamoria

et al. 2015

J Solution Chem

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In order to gain insight into the role of environmentally benign imidazolium based ionic liquids (ILs) to alter the physicochemical properties of single chain cationic surfactants, we have investigated the effect of 1-hexyl-3-methylimidazolium bromide ([C 6 mim][Br]) and 1-octyl-3-methylimidazolium bromide ([C 8 mim][Br]) on the aggregation behavior of aqueous tetradecyltrimethylammonium bromide (TTAB). The critical micelle concentration (CMC) of TTAB at different concentrations of ILs was determined through conductance, surface tension, spectral change of a dye by UV-Vis measurement, and the pyrene fluorescence probe measurement techniques at 298.15 K. Decreasing of the CMC of aqueous TTAB with increasing ILs concentration proves the micellization is favorable. The effect of ILs on the properties of TTAB was verified by using NaBr. Surface tension measurements complimented by dynamic light scattering (DLS) data revealed the packing density of TTAB aggregates at different concentrations of ILs. The effective area of TTAB molecules at the air/water interface was calculated by the Gibbs adsorption isotherm and found to decrease up to 0.6 wt% of ILs followed by an increase at higher concentration. DLS data revealed an increase in micellar size of TTAB at higher concentration of IL with decrease in the aggregation number (N agg ), determined by the fluorescence quenching method.

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Section: Spectral Change Of Dye By Uv-vis Measurementmentioning

confidence: 99%

Effect of [C n mim][Br] Based Ionic Liquids on the Aggregation Behavior of Tetradecyltrimethylammonium Bromide in Aqueous Medium

Vaid

Bhamoria

et al. 2015

J Solution Chem

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“…The standard free energy change for the transfer of dye from the bulk water phase to the micellar phase is given by [43,47].…”

Section: Critical Packing Parameter (Cpp)mentioning

confidence: 99%

Synthesis and Surface Active Properties of Gemini Cationic Surfactants and Interaction with Anionic Azo Dye (AR52)

Abdel-Salam

El-Said

2011

J Surfact & Detergents

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A homologous series of new gemini cationic surfactants were synthesized and characterized using micro elemental analysis, FTIR, 1 H-NMR and mass spectra. The surface activities of these amphiphiles were determined based on the data of surface tension. Critical micelle concentration, effectiveness of the surface tension reduction, efficiency of adsorption, maximum surface excess, minimum surface area and critical packing parameter were evaluated. The effect of cationic micelles on solubilization of anionic azo dye, sulforhodamine B (Acid Red 52) in aqueous micellar solution of the synthesized gemini cationic surfactants was studied at pH 6.9 ± 0.5 and 25°C. The results showed that the solubility of dye rose with increasing surfactant concentration as a consequence of some association between the dye and the micelles. It was also observed that the aggregation of surfactant and dye takes place at a surfactant concentration below the CMC of the individual surfactant. The partition coefficients between the bulk water and surfactant micelles as well as the Gibbs energies of distribution of dye between the bulk water and surfactant micelles were calculated using a pseudo-phase model. The effect of the hydrophobic chain length of Gemini cationic surfactants on the distribution parameters was also reported. The results show favorable solubilization of dye in cationic micelles.

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“…The standard free energy change for the transfer of dye from the bulk water phase to the micellar phase is given by [28][29][30]:…”

Section: Determination Of the Partition Coefficientsmentioning

confidence: 99%

“…The distribution of dye between aqueous and micellar phases has been described as association equilibria [26,29]:…”

Section: Determination Of the Partition Coefficientsmentioning

confidence: 99%

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Study of the Interaction Between Methyl Orange and Mono and Bis‐Quaternary Ammonium Surfactants

Alehyen

Bensejjay

Achouri³

et al. 2009

J Surfact & Detergents

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The solubilization and interaction of an azodye (methyl orange) with dodecyl trimethyl ammonium bromide and cationic gemini surfactants in the series of alkanediyl a,x-bis[(dimethyl alkyl ammonium)bromide)] referred to as (m-s-m), m = 10, 12, 14 and s = 2, 3, 4 were investigated by means of UV-Vis spectroscopy. Aggregation with the anionic dye was reflected by a hypsochromic shift with a decrease in the intensity of the absorption band. The results also show a bathochromic shift followed by a sharp increase in the intensity of the maximum absorption band k max after the critical micellar concentration (CMC). This indicates that the dye solubility increased with increasing surfactant concentration. It was also observed that the aggregation of surfactant and dye takes place at a surfactant concentration far below the CMC of the individual surfactant. The effects of the chain length as well as the spacer length of gemini surfactants on the critical aggregation concentration and CMC were also examined. Moreover, the partition coefficients between the bulk water and surfactant micelles K S and K X as well as the Gibbs energies of distribution of dye between the bulk water and surfactant micelles were determined using the pseudophase model. The effect of the hydrophobic chain length and spacer of gemini surfactants on the distribution parameters is also reported.

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Complex formation study of hemicyanine dyes with sodium dodecyl sulfate by differential spectroscopy

Cited by 24 publications

References 28 publications

Effect of [C n mim][Br] Based Ionic Liquids on the Aggregation Behavior of Tetradecyltrimethylammonium Bromide in Aqueous Medium

Effect of [C n mim][Br] Based Ionic Liquids on the Aggregation Behavior of Tetradecyltrimethylammonium Bromide in Aqueous Medium

Synthesis and Surface Active Properties of Gemini Cationic Surfactants and Interaction with Anionic Azo Dye (AR52)

Study of the Interaction Between Methyl Orange and Mono and Bis‐Quaternary Ammonium Surfactants

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