title: 4-Sulfonatocalix[6]arene-induced aggregation of ionic liquids.
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.
authors.affiliation: Systèmes Polymères Complexes, ICMPE, 2 rue Henri Dunant, 94320 Thiais, France.
authors.forename: Véronique
authors.initials: V
authors.lastname: Wintgens
authors.forename: Clémence
authors.initials: C
authors.lastname: Le Coeur
authors.forename: Catherine
authors.initials: C
authors.lastname: Amiel
authors.forename: Jean-Michel
authors.initials: JM
authors.lastname: Guigner
authors.forename: József G
authors.initials: JG
authors.lastname: Harangozó
authors.forename: Zsombor
authors.initials: Z
authors.lastname: Miskolczy
authors.forename: László
authors.initials: L
authors.lastname: Biczók
mesh_terms: D020285:Cryoelectron Microscopy; D052578:Ionic Liquids / Q000737:chemistry*; D047028:Macrocyclic Compounds / Q000737:chemistry*; D046529:Microscopy, Electron, Transmission
chemical_list: D052578:Ionic Liquids; D047028:Macrocyclic Compounds