Synthesis of cationic hemicyanine dyes and their interactions with ionic surfactants

Shah, Syed Sakhawat; Ahmad, Rabia; Asif, Khan M.; Naeem, Kashif

doi:10.1016/s0927-7757(97)00384-1

Cited by 34 publications

(11 citation statements)

References 13 publications

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“…With the increase in the surfactant concentration above the cmc, the shift reduced which may be due to decrease in polarity as a result of incorporation of drug molecules or complexes into the micelles. Similar shift in the absorption maxima due to ionic interaction was also reported by Shah et al, [36]. The shift in k max was found to be independent of pH.…”

Section: Uv-vis Spectrum Analysissupporting

confidence: 88%

Assessment of solubilization characteristics of different surfactants for carvedilol phosphate as a function of pH

Chakraborty

Shukla

Jain

et al. 2009

Journal of Colloid and Interface Science

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Section: Uv-vis Spectrum Analysissupporting

confidence: 88%

Assessment of solubilization characteristics of different surfactants for carvedilol phosphate as a function of pH

Chakraborty

Shukla

Jain

et al. 2009

Journal of Colloid and Interface Science

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“…All tests were conducted at 25°C and pH 7. The DTAB exhibits the expected effect consistent with what has been observed by others workers [14][15][16][17]. Successive additions of small concentrations of DTAB decreased the intensity of the absorption band at 470 nm.…”

Section: Methodssupporting

confidence: 90%

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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“…Recently, our group has shown such type of electrostatic interaction in organized media [28]. There has been similar report also on dyeemicelle interaction, where electrostatic interaction plays a leading role in the reaction [29]. In some cases [17], not charge compensation but the hydrophobic interaction, becomes predominant in the reaction condition.…”

Section: Introductionsupporting

confidence: 63%

Dye–micelle aggregate formation for effective photobleaching

et al. 2006

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Synthesis of cationic hemicyanine dyes and their interactions with ionic surfactants

Cited by 34 publications

References 13 publications

Assessment of solubilization characteristics of different surfactants for carvedilol phosphate as a function of pH

Assessment of solubilization characteristics of different surfactants for carvedilol phosphate as a function of pH

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

Dye–micelle aggregate formation for effective photobleaching

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