4-Sulfonatocalix[6]arene-induced aggregation of ionic liquids
| Autor: | Clémence Le Coeur, Jean Michel Guigner, József G. Harangozó, Véronique Wintgens, Catherine Amiel, Zsombor Miskolczy, László Biczók |
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| Rok vydání: | 2013 |
| Předmět: |
Aqueous solution
Macrocyclic Compounds Inorganic chemistry Cryoelectron Microscopy Substituent Nanoparticle Ionic Liquids Surfaces and Interfaces Electron Neutron scattering Condensed Matter Physics chemistry.chemical_compound chemistry Microscopy Electron Transmission Ionic liquid Electrochemistry General Materials Science Spectroscopy Stoichiometry Spherical shape |
| Zdroj: | Langmuir : the ACS journal of surfaces and colloids. 29(25) |
| ISSN: | 1520-5827 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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