Effect of Headgroup Variation on the Self-Assembly of Cationic Surfactants with Sulfonatocalix[6]arene

Véronique Wintgens, József G. Harangozó, Z. Miskolczy, Jean Michel Guigner, Catherine Amiel, L. Biczók

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The effect of headgroup variation on the association of supramolecular amphiphiles composed of 4-sulfonatocalix[6]arene (SCX6) and cationic surfactant possessing tetradecyl substituent was studied in aqueous solutions at pH 7. When the surfactant contained hydrophilic trimethylammonium, pyridinium, or 1-methylimidazolium headgroup, highly reversible temperature-responsive nanoparticle-supramolecular micelle transformation could be attained at appropriately chosen component mixing ratios and NaCl concentrations. In these cases, the substantial negative molar heat capacity change (ΔCp) rendered nanoparticle formation strongly endothermic at low temperature, whereas the assembly to supramolecular micelle was always accompanied by enthalpy gain. The ΔCp values became less negative when the charge density and the hydrophilic character of the surfactant headgroup diminished. The association of the more hydrophobic 6-methoxyquinolinium and quinolinium surfactants with SCX6 did not lead to supramolecular micelle formation because the self-assembly into nanoparticles was highly exothermic.

Original languageEnglish
Pages (from-to)8052-8061
Number of pages10
JournalLangmuir
Volume33
Issue number32
DOIs
Publication statusPublished - Aug 15 2017

Fingerprint

Cationic surfactants
Micelles
Surface-Active Agents
Self assembly
self assembly
Surface active agents
surfactants
Nanoparticles
micelles
nanoparticles
Amphiphiles
Charge density
Specific heat
Enthalpy
mixing ratios
Temperature
assembly
enthalpy
specific heat
aqueous solutions

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Effect of Headgroup Variation on the Self-Assembly of Cationic Surfactants with Sulfonatocalix[6]arene. / Wintgens, Véronique; Harangozó, József G.; Miskolczy, Z.; Guigner, Jean Michel; Amiel, Catherine; Biczók, L.

In: Langmuir, Vol. 33, No. 32, 15.08.2017, p. 8052-8061.

Research output: Contribution to journalArticle

Wintgens, Véronique ; Harangozó, József G. ; Miskolczy, Z. ; Guigner, Jean Michel ; Amiel, Catherine ; Biczók, L. / Effect of Headgroup Variation on the Self-Assembly of Cationic Surfactants with Sulfonatocalix[6]arene. In: Langmuir. 2017 ; Vol. 33, No. 32. pp. 8052-8061.
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