Critical viscosity near the liquid–liquid phase transition in the solution of the ionic liquid1-methyl-3-hexylimidazolium tetrafluoroborate in 1-pentanol

Literature Information

Publication Date 2004-03-04
DOI 10.1039/B315616H
Impact Factor 3.676
Authors

Monika Wagner, Olimpiu Stanga, Wolffram Schröer


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Abstract

In this work, we report measurements of viscosity and density near the liquid–liquid phase transition of the binary solution of the room temperature ionic liquid (RTIL) 1-methyl-3-hexylimidazolium tetrafluoroborate (C6mim+BF4−) in 1-pentanol. The density and the shear viscosity have been determined as function of the temperature and of the concentration. The critical point is located at the temperature Tc = 314.91 K and the mass fraction wc = 0.31034 of the salt. For the critical concentration, the viscosity measurements yield an enhancement as expected for Ising criticality with a crossover to regular behaviour. The regular background is obtained by interpolation from the measurements at non-critical concentrations. The critical enhancement is well described by the mode-coupling crossover function of Bhattacharjee et al. (Phys. Rev. A, 1981, 24, 1469) .The closed form result of the limiting case qD/qc → 0 matches the data almost perfectly.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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