Journal ArticleDOI
Micellization Behaviour of m-E2-m Biodegradable Gemini Surfactants in Presence of Sodium Alkanoates (Sodium Propionate, Sodium Hexanoate, Sodium Decanoate)
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Results depict that the alkanoates are effective in bringing significant changes in the physicochemical parameters of the m-E2-m geminis; the order being followed is NaDec > NaHx > NaPr.Abstract:
The present study involves the micellization of novel biodegradable gemini surfactants (1,2-diyl-bis(N,N-dimethyl-N-alkyl-ammoniumacetoxy) dichlorides, m-E2-m; m = 12,14,16 is the number of carbon atoms in the tail and E2 represents the diester-group-containing spacer) in presence of sodium alkanoates (sodium propionate, sodium hexanoate, sodium decanoate). The techniques of tensiometry and spectrofluorimetry were utilized to probe the changes in various physicochemical parameters, viz. critical micellar concentration (CMC), surface excess concentration (Γmax), minimum area per head group (Amin), Gibbs free energy of micellization (ΔG°mic), Gibbs free energy of adsorption (ΔG°ads), aggregation number (Nagg) and local polarity index (I1/I3). Results depict that the alkanoates are effective in bringing significant changes in the physicochemical parameters of the m-E2-m geminis; the order being followed is NaDec > NaHx > NaPr. Both hydrophobic and electrostatic factors were found to be contributive....read more
Citations
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Rheological response and small-angle neutron-scattering study of diester-bonded cationic biodegradable gemini surfactants in presence of different additives
TL;DR: In this paper, small-angle neutron-scattering (SANS) measurements of planar dicationic-ester-bonded biodegradable gemini surfactants have been used to obtain information about the aggregation behavior at the molecular level.
Journal ArticleDOI
Composition dependent density of ternary aqueous solutions of ionic surfactants and salts : capturing the effect of surfactant micellization in atmospheric droplet model solutions
TL;DR: In this article, the authors developed density functions based on the pseudo-separation method and Young's mixing rule for apparent partial molal volumes for solutions that mimic atmospheric droplets of marine environments.
References
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Journal ArticleDOI
Alkanediyl-α,ω-bis(dimethylalkylammonium bromide) surfactants. I, Effect of the spacer chain length on the critical micelle concentration and micelle ionization degree
Raoul Zana,M. Benrraou,R. Rueff +2 more
TL;DR: In this article, the critical micelle concentration and micelle ionization degree of the title surfactants in aqueous solution were investigated as a function of the number of carbon atoms of the alkanediyl spacer and the alkyl chain.
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Luminescent probes for detergent solutions. A simple procedure for determination of the mean aggregation number of micelles
Nicholas J. Turro,Ahmad Yekta +1 more
Journal ArticleDOI
Gemini surfactants : synthesis and properties
Fredric M. Menger,C. A. Littau +1 more
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Adsorption and the Gibbs surface excess
TL;DR: In this paper, the Gibbs Equation is used to describe the Gibbs equilibrium at the interface of a mixture of solids and a binary solution of the solids, and the Gibbs equation is applied to the double layer of a binary solver.
Journal ArticleDOI
Gemini surfactants: New synthetic vectors for gene transfection
Anthony J. Kirby,Patrick Camilleri,Jan B. F. N. Engberts,Martin C. Feiters,Roeland J. M. Nolte,Olle Söderman,Mark Bergsma,Paul C. Bell,Matthew Fielden,Cristina L. García Rodríguez,Philippe Guedat,Andreas Kremer,Caroline McGregor,Christele Perrin,Gaël Ronsin,Marcel C. P. van Eijk +15 more
TL;DR: Evidence suggests that DNA may be released from the lipoplex before entry into the nucleus, where the new gene can be expressed with high efficiency.