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Šarac B, Mériguet G, Ancian B, et al. Salicylate isomer-specific effect on the micellization of dodecyltrimethylammonium chloride: large effects from small changes. Langmuir. 2013;29(14):4460-9doi: 10.1021/la400161n.
Šarac, B., Mériguet, G., Ancian, B., & Bešter-Rogač, M. (2013). Salicylate isomer-specific effect on the micellization of dodecyltrimethylammonium chloride: large effects from small changes. Langmuir : the ACS journal of surfaces and colloids, 29(14), 4460-9. https://doi.org/10.1021/la400161n
Šarac, Bojan, et al. "Salicylate isomer-specific effect on the micellization of dodecyltrimethylammonium chloride: large effects from small changes." Langmuir : the ACS journal of surfaces and colloids vol. 29,14 (2013): 4460-9. doi: https://doi.org/10.1021/la400161n
Šarac B, Mériguet G, Ancian B, Bešter-Rogač M. Salicylate isomer-specific effect on the micellization of dodecyltrimethylammonium chloride: large effects from small changes. Langmuir. 2013 Apr 09;29(14):4460-9. doi: 10.1021/la400161n. Epub 2013 Mar 25. PMID: 23477611.
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Langmuir. 2013 Apr 09;29(14):4460-9. doi: 10.1021/la400161n. Epub 2013 Mar 25.

Salicylate isomer-specific effect on the micellization of dodecyltrimethylammonium chloride: large effects from small changes.

Langmuir : the ACS journal of surfaces and colloids

Bojan Šarac, Guillaume Mériguet, Bernard Ancian, Marija Bešter-Rogač

Affiliations

  1. Faculty of Chemistry and Chemical Technology, University of Ljubljana, Ašker?eva 5, Ljubljana 1000, Slovenia. [email protected]

PMID: 23477611 DOI: 10.1021/la400161n

Abstract

Specific effects of the sodium salts of m- and p-hydroxybenzoates (m-HB and p-HB) on the aggregation process of dodecyltrimethylammonium chloride have been investigated by isothermal titration calorimetry, electrical conductivity, and (1)H NMR and compared with already reported data for the sodium salt of o-hydroxybenzoate (o-HB). For p-HB, it has been found that the aggregate is only formed by spherical micelles at all p-HB concentrations. On the other side, the situation is more complex for o-HB, where two distinct states of aggregation can be involved, depending on the concentration of o-HB. At high salt concentration, rodlike micelles are formed, whereas at lower concentration spherical aggregates are predominant. The transition from the cylinder to the sphere increases the mobility of the surfactant because the core of the rodlike micelles is more closely packed due to the expulsion of water from the interior of the aggregate. m-HB exhibits an intermediate behavior between these two extreme situations. The effect of the position of hydrophilic substituents on the aromatic ring on the insertion of the hydroxybenzoate anion in the micellar aggregate has been discussed.

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