title: A study of the dielectric behaviour and the liquid structure of a ternary solvent system.
abstract: The static dielectric constant of the [DMF(1) + ME(2) + DME(3)] ternary mixtures was measured as a function of temperature (25 < or = t/degrees C < or = 80) and composition, over the whole mole fraction range 0 < or = chi,chi2,chi3 < or = 1. The experimental values were processed by an empirical equation accounting for the dependence epsilon = epsilon(T, phi(i)), where phi(t) is the volume fraction of the components. A comparison between calculated and experimental data shows that this fitting relationship can be effectively employed to predict epsilon values in correspondence to experimental data gaps. Starting from the experimental measurements, some derived quantities such as molar polarisation (P), and excess counterpart (PE) were obtained. Both the excess properties, epsilonE and PE, take values partly positive and partly negative under all experimental conditions. The values of the excess quantities are indicative of the presence of specific interactions among different components in the mixtures.
authors.affiliation: Department of Chemistry, University of Modena and Reggio Emilia, via G. Campi 183, 41100 Modena, Italy.
authors.forename: Marina
authors.initials: M
authors.lastname: Cocchi
authors.forename: GianCarlo
authors.initials: G
authors.lastname: Franchini
authors.forename: Andrea
authors.initials: A
authors.lastname: Marchetti
authors.forename: Laura
authors.initials: L
authors.lastname: Pigani
authors.forename: Renato
authors.initials: R
authors.lastname: Seeber
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Tassi
authors.forename: Alessandro
authors.initials: A
authors.lastname: Ulrici
authors.forename: Chiara
authors.initials: C
authors.lastname: Zanardi
authors.forename: Paolo
authors.initials: P
authors.lastname: Zannini
mesh_terms: D004563:Electrochemistry; D008956:Models, Chemical; D012997:Solvents / Q000737:chemistry*; D013696:Temperature
chemical_list: D012997:Solvents