Thermodynamics of molecular self-assembly of cationic Gemini and related double chain surfactants in aqueous solution

Article Abstract:

The possibilities of using Gemini amphiphilies to create new types of surfactants have attracted more attention. The widely studied geminis are dicatonic quaternary ammonium compounds having the following structures [C(sub M)H(sub 2M+1)(CH(sub 3))(sub 2)N(CH(sub 2))(sub S)(CH(sub 3))(sub 2)C(sub M)H(sub 2M+1)]Br(sub 2) referred to as C(sub M)C(sub S)C(sub M)Br(sub 2) where M and S indicate the numbers of carbons in the side alkyl chain and the spacer respectively.

Spectra

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Thermodynamics of self-assembling of hydrophobically modified cationic polysaccharides and their mixtures with oppositely charged surfactants in aqueous solution

Article Abstract:

The thermodynamics of self-assembling of hydrophobically modified cationic polysaccharides and their mixtures with oppositely charged surfactants in aqueous solution was studied using microcalorimetric techniques combined with turbidity measurements. The micellization process of hydrophobically modified cationic polysaccharides was evaluated from the results of isothermal titration calorimetry and fluorescence measurement.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Surface Active Agents, Polysaccharides, Thermal properties

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Micellization of cationic Gemini surfactants with various counterions and their interaction with DNA in aqueous solution

Article Abstract:

The micellization of six cationic Gemini surfactants with various counterions and their interaction with DNA in aqueous solution is examined by isotheral titration microcalorimetry and conductivity measurements. The conclusion states that the interactions of all the surfactants with DNA is dependent on the DNA concentration and may be associated with each micelle interacting with more than one DNA molecule.

Science & research, Biological Product (except Diagnostic) Manufacturing, Drugs, Deoxyribonucleic Acid, Research, DNA, Observations, Micelles

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