Solubilization of Amphiphilic Hemicyanine Dyes by a Cationic Surfactant, Cetyltrimethylammonium Bromide

Shah, Syed Sakhawat; Khan, Matiullah; Ullah, Hadayat; Awan, Muhammad Ali

doi:10.1006/jcis.1996.4649

Cited by 61 publications

(24 citation statements)

References 5 publications

(8 reference statements)

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“…For the surfactant concentrations higher than CMC the intensity of the band stood constant. Such observations are according to a theory proposed by Shah et al [30] that in the solutions containing surfactant at the concentration near CMC first an adhesion of ionic pairs on the surfaces of micelles formed in the system takes place and then dye particles are incorporated into the micelles. The observed bathochromic shift can also result from the interaction between aromatic rings present in the structure of the dye (p À p stacking) [31] and formation of dye J-aggregates (head-to-tail).…”

Section: Spectral Studiesmentioning

confidence: 54%

Dye–surfactant interaction in aqueous solutions

2009

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Section: Spectral Studiesmentioning

confidence: 54%

Dye–surfactant interaction in aqueous solutions

2009

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“…Cetyl trimethyl ammonium bromide (CTAB) was taken as a reference [25]. The mean value obtained for three individual replicates was used to calculate the zone of growth inhibition of each sample.…”

Section: Antimicrobial Studiesmentioning

confidence: 99%

Screening for Potential Antimicrobial Activities of Some Cationic Uracil Biocides Against Wide‐Spreading Bacterial Strains

Negm

Aiad

Tawfik

2010

J Surfact & Detergents

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Eight novel uracil-based cationic surfactants containing Schiff base species were synthesized and characterized using elemental analysis, FTIR, 1 H-NMR and 13 C-NMR spectroscopy. The surface activities of the synthesized Schiff bases and their cationic derivatives were determined based on interfacial tension measurements and partition coefficient values in water/octanol system. The synthesized Schiff bases and their cationic derivatives were evaluated as novel biocides against different bacteria and fungi strains. The results showed that the biocidal activity of the synthesized Schiff bases was considerably increased by quaternization. The influence of the cationic surfactants as biocides was increased by increasing the hydrophobic chain length and the presence of the methoxy groups. The biocidal activity was also increased by increasing the partition coefficient in water/octanol system. The structure and surface activity/ biocidal activity of the different compounds were discussed.

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“…The mean value obtained for three individual replicates was used to calculate the zone of growth inhibition of each sample. The results were compared with a similar run of Cetyl trimethyl ammonium bromide (BRADORAL Trade Mark) [21] as an antibacterial reference and Grisofluvine as an antifun- …”

Section: Measurements Of Resistance and Susceptibilitymentioning

confidence: 99%