Liquid–liquid coexistence curves of re-entrant phase transitions beyond the asymptotic range: tetrahydrofuran + water and tetrahydrofuran + heavy water

Literature Information

Publication Date 2002-02-15
DOI 10.1039/B109349E
Impact Factor 3.676
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Abstract

We report on the coexistence curves of mixtures of tetrahydrofuran (THF) with water and heavy water over four decades in reduced temperature, from about 35 to 0.01 K from the lower consolute points. The compositions of the coexisting phases are determined by refractive index measurements. For each system the universal asymptotic critical behaviour and the non-universal behaviour further away from the critical point are analysed using several choices of the order parameter. The volume fraction is found to form the optimum order parameter. Several definitions of the reduced temperature are tested which account for the simultaneous presence of an upper consolute point at about 65 K above the lower consolute point. The behaviour of the effective critical exponent and the signs and amplitudes of the Wegner corrections to scaling are discussed with regard to regular contributions to the order parameter and mean-field criticality further away from the critical point.

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Contents list

Front/Back Matter

DOI: 10.1039/D0OB90034F

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Source Journal

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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