Determination of the thermodynamic acidity constant of 3-phenyl-4-benzoylisoxazol-5-one (HPBI) using the binding mean spherical approximation model
文献信息
The acidic properties of 3-phenyl-4-benzoylisoxazol-5-one (HPBI), a well-known extractant of potential use in nuclear waste processing, have been studied by means of UV-Visible spectrophotometry. The effects of perchloric and hydrochloric acids on the absorption spectra of HPBI have been examined, from low to very high concentrations of these two additives. The HPBI absorption spectra are very similar in the presence of either acid up to 5 mol dm-3. The mean spherical approximation model has been used in this range of concentration to describe the thermodynamic properties of the solutions, and thus to determine the pKa of the first acidity of HPBI. A comparison with other values given in the literature is made. Above 5 mol dm-3, a clear difference appears between the absorption spectra obtained in aqueous solutions of HCl or HClO4, which may be ascribed to changes in the properties of the solvents.
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Physical Chemistry Chemical Physics

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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