Calibration and applications of the ΔMP2 method for calculating core electron binding energies
Literature Information
Jocelyne Shim, Mariusz Klobukowski, Maria Barysz, Jerzy Leszczynski
We calibrated a method for the evaluation of core electron binding energies, based on the energy differences between the cation and neutral molecule evaluated at the level of Møller–Plesset perturbation theory. The central feature of the method is the use of a mixed basis set: a large all-electron basis set is used for the atom whose core electron is removed, while the model core potential basis set is employed for all remaining atoms. Calibration was carried out for 55 molecules and 114 binding energies of 1s core electrons for the atoms C, N, O, and F. The average absolute deviation for all the core electron binding energies is 0.163 eV. The method was applied to the calculation of the core electron binding energies of five nucleic acid bases (uracil, adenine, cytosine, guanine, and thymine) and several of their low-energy tautomers.
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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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