A Relationship between Intermolecular Potential, Thermodynamics, and Dynamic Scaling for a Supercooled Ionic Liquid

Abstract

In this letter, we report that an essentially extended scaling version of the Avramov model leads to a consistent relation between dynamic scaling and thermodynamic properties in the thermodynamic scaling regime, which is valid for a considered herein ionic liquid 1-butyl-1-methylpyrrolidinium bis[oxalate]-borate (BMP-BOB), although the thermodynamic scaling works imperfectly for the tested ionic liquid. Taking into account that the relation is suggested to be well-grounded by an effective intermolecular potential based on the inverse power law, this finding is meaningful because it shows that benefits originating from the thermodynamic scaling idea and the newly developed Avramov model can concern a wider class of materials than only supercooled van der Waals liquids, and consequently the theoretical approach presented herein can play an important role in the description of molecular dynamics near the glass transition.