The effect of hydration on the electronic structure and stability of the superalkali cation Li3+
Literature Information
Jia-Huan Hou, Di Wu, Jia-Yuan Liu, Si-Yi Li, Dan Yu, Ying Li
The interaction of the superalkali cation Li3+ with water molecules, as well as the structures and stability of the resulting water complexes are theoretically studied at the MP2/6-311++G(d,p) level. A great number of geometrical configurations were obtained for the Li3+(H2O)n (n = 1–5) complexes and Li3+ is found to have a maximum coordination number of four. Natural population analysis shows that the charge distribution of Li3+ becomes seriously uneven upon interaction with five water molecules, so it loses ring conjugation and splits in the lowest-energy isomer of Li3+(H2O)5. Localized molecular orbital energy decomposition analysis indicates a dominant contribution of electrostatic interactions to the binding of water molecules to Li3+, which is similar to the case of lithium ion hydrates. However, as the number of water ligands reaches five, the contribution of the exchange-repulsion energy exhibits a sharp increase and even exceeds that of the electrostatic term.
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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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