Solvent effect on monomer–dimer equilibrium in supercritical fluid: Spectroscopic and thermodynamic studies

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Publication Date
DOI 10.1039/A808298G
Impact Factor 3.676
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Abstract

The monomer–dimer equilibrium of lauric acid in supercritical CO2 was studied at different temperatures and pressures using FTIR spectroscopy. The equilibrium constant and thermodynamic properties of the dimerization were obtained based on the spectroscopic determinations. It has been found that fluid density plays an important role on the dimerization. Thermodynamic studies on the equilibrium suggested that there may be differential solvent effects on the monomer and dimer. At lower density, the solvent aggregates about the solute and, therefore, the differential solvent effect is significant. With increase in density the solvent–solute clustering and differential solvent effect decrease, and the supercritical solution becomes more homogeneous.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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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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