Density functional theory study of the aluminium(iii)hydrolysis in aqueous solution
Literature Information
Wenjing Yang, Zhaosheng Qian, Qiang Miao, Yingjie Wang, Shuping Bi
Supermolecule density functional calculations were performed on the hydrolysis of aluminum(III) and prediction of pKa in aqueous solution. The optimization results showed that the most stable structures for the first, second and third hydrolysis products were hexacoordinate, hexacoordinate and pentacoordinate, respectively. The different coordination geometries could easily transform into each other due to the small energy gaps (within 2.5 kcal mol−1). The calculated value of 4.6 for the first hydrolysis constant agreed well with the experimental value of 5.0. The results from the different thermodynamic cycles have been compared, which revealed that the cycle involving the solvation of H2O and H3O+ could reasonably predict the first hydrolysis constant, while the other cycle involving the solvation of H+ acquired a fairly good correlation of the hydrolysis reaction free energies and the experimental pKa.
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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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