caa a22 4500 477138950 CHVBK 20180405111727.0 cr unu---uuuuu 170330e19970601xx s 000 0 eng 10.1007/BF02767634 doi (NATIONALLICENCE)springer-10.1007/BF02767634 Conductivity of lithium perfluorononanoate in water-poly(vinyl pyrrolidone) solutions [Elektronische Daten] [Alessandro D'Aprano, Bianca Sesta, Noemi Proietti, Vincenzo Mauro] Conductivity measurements, focused on the counterion binding of lithium perfluorononanoate (LiPFN) micelles in pure water and in the presence of poly(vinyl pyrrolidone) (PVP), have been carried out. An abrupt decrease of the conductance of the LiPFN in pure water, due to the self aggregation of anions and to dynamic linkage of cations on the micellar surface, has been found. Analysis of the conductometric data indicates that about 50% of the stoichiometric concentration of Li+ interacts with the head groups of the perfluorinated anions involved in micellar assembly. Conductometric data of LiPFN-water-PVP systems reveals a favorable influence of the PVP on the micellization process modulated by the concentration and by the molecular weight of the polymer. Analysis of these data shows that in presence of PVP the degree of binding of lithium ion to the micellar assemblies linked to the polymer is smaller than in pure water. By increasing the amount of surfactant in solution up to the concentration where the polymer becomes saturated by LiPFN micelles, the binding of lithium ion in the system becomes slightly greater than that observed in LiPFN-water system. This finding can be interpreted in terms of additional binding of lithium ion to the polymer chains. Conductivity measurements carried out on LiClO4 and KClO4 in water + PVP support this interpretation. Plenum Publishing Corporation, 1997 Conductance nationallicence surface tension nationallicence electrostatic and hydrophobic interactions nationallicence lithium heptadecafluorononanoate nationallicence poly(vinylpyrrolidone) nationallicence lithium perchlorate nationallicence potassium perchlorate nationallicence D'Aprano Alessandro Department of Chemistry, La Sapienza University, P.le Aldo Moro 5, 00185, Roma aut Sesta Bianca Department of Chemistry, La Sapienza University, P.le Aldo Moro 5, 00185, Roma aut Proietti Noemi Department of Chemistry, La Sapienza University, P.le Aldo Moro 5, 00185, Roma aut Mauro Vincenzo Department of Chemistry, La Sapienza University, P.le Aldo Moro 5, 00185, Roma aut Journal of Solution Chemistry Springer US 26/6(1997-06-01), 649-662 0095-9782 26:6<649 1997 26 10953 https://doi.org/10.1007/BF02767634 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02767634 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- D'Aprano Alessandro Department of Chemistry, La Sapienza University, P.le Aldo Moro 5, 00185, Roma aut NATIONALLICENCE 700 1- Sesta Bianca Department of Chemistry, La Sapienza University, P.le Aldo Moro 5, 00185, Roma aut NATIONALLICENCE 700 1- Proietti Noemi Department of Chemistry, La Sapienza University, P.le Aldo Moro 5, 00185, Roma aut NATIONALLICENCE 700 1- Mauro Vincenzo Department of Chemistry, La Sapienza University, P.le Aldo Moro 5, 00185, Roma aut NATIONALLICENCE 773 0- Journal of Solution Chemistry Springer US 26/6(1997-06-01), 649-662 0095-9782 26:6<649 1997 26 10953 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer