n-Alkyl alcohols at the water/vapour and water/benzene interfaces: a study on phase transfer energies

Literature Information

Publication Date 2000-08-15
DOI 10.1039/B004330N
Impact Factor 3.676
Authors

Luca Frediani, Christian S. Pomelli, Jacopo Tomasi


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Abstract

A preliminary study on the behaviour of molecular solutes at the interface of liquid water with other media is reported. The study is based on an extension of the polarizable continuum model (PCM) which gives solvation free energy as the difference between the quantum mechanically computed free energy of the molecule inserted in the medium and that of the isolated molecule. The PCM computational scheme is modified to take into account the position and orientation of the molecule with respect to the phase separation boundary. The energetic quantity object of this study is thus a position and orientation dependent free energy function. The other features of standard PCM, in particular the use of continuum solvent response functions, are maintained. The comparison with molecular dynamics simulations shows that this model gives reasonable results, also in the presence of a phase separation. The decomposition of the free energy values along the best energetic passage from one phase to another shows that the minimum and the maximum present in the free energy profile mainly depend on non-electrostatic dispersion and steric terms.

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Source Journal

Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
CiteScore: 5.5
Self-citation Rate: 10.3%
Articles per Year: 3036

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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