4-sulfonatocalix[6]arene-induced aggregation of ionic liquids

Véronique Wintgens, Clémence Le Coeur, Catherine Amiel, Jean Michel Guigner, József G. Harangozó, Zsombor Miskolczy, László Biczók

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25 Citations (Scopus)

Abstract

The interaction of 4-sulfonatocalix[6]arene (SCX6) macrocycle with 1-alkyl-3-methylimidazolium type of ionic liquids possessing dodecyl, tetradecyl, or hexadecyl substituent was studied in aqueous solution at 298 K. Host-guest complexation promoted the spontaneous self-assembly into nanoparticles of 7:1 ionic liquid:SCX6 stoichiometry. Positively charged and stable nanoparticles were produced in solutions of 7-200-fold excess of ionic liquid as compared to the amount of SCX6. The negatively charged nanoparticles formed in solutions having 2-7 ionic liquid:SCX6 molar ratios evolved into larger species. The stability of the nanoparticles increased with the lengthening of aliphatic chain of the ionic liquid. Cryo-TEM experiments showed dense particles generally with spherical shape and multilayered structure, which has been confirmed by small-angle neutron scattering.

Original languageEnglish
Pages (from-to)7682-7688
Number of pages7
JournalLangmuir
Volume29
Issue number25
DOIs
Publication statusPublished - Jun 25 2013

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ASJC Scopus subject areas

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

Cite this

Wintgens, V., Le Coeur, C., Amiel, C., Guigner, J. M., Harangozó, J. G., Miskolczy, Z., & Biczók, L. (2013). 4-sulfonatocalix[6]arene-induced aggregation of ionic liquids. Langmuir, 29(25), 7682-7688. https://doi.org/10.1021/la401185p