On the scaling behavior of electric conductivity in [C4mim][NTf2]

• Published in: Physical chemistry chemical physics : PCCP 2014-10, Vol.16 (38), p.2444-245
• Main Authors: Wojnarowska, Z, Jarosz, G, Grzybowski, A, Pionteck, J, Jacquemin, J, Paluch, M
• Format: Article
• Language: English
• Subjects: Constants; Density; Dynamic tests; Electrical conductivity; Exponents; Ionic liquids; Liquids; Thermodynamics
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/c4cp02253j

In this work we examine, for the first time, the molar conductivity behavior of the deeply supercooled room temperature ionic liquid [C 4 mim][NTf 2 ] in the temperature, pressure and volume thermodynamic space in terms of density scaling ( TV γ ) −1 combined with the equation of state (EOS). The exponent γ σ determined from the Avramov model analysis is compared with the coefficient obtained from the viscosity studies carried out at moderate temperatures. Therefore, the experimental results presented herein provide the answer to the long-standing question regarding the validity of thermodynamic scaling of ionic liquids over a wide temperature range, i.e. from the normal liquid state to the glass transition point. Finally, we investigate the relationship between the dynamic and thermodynamic properties of [C 4 mim][NTf 2 ] represented by scaling exponent γ and Grüneisen constant γ G , respectively. In this work we examine, for the first time, the molar conductivity behavior of the deeply supercooled room temperature ionic liquid [C 4 mim][NTf 2 ] in the temperature, pressure and volume thermodynamic space in terms of density scaling regime ( TV γ ) −1 combined with the equation of state (EOS).