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Updated: Jul 6, 2025

Computation of Atmospheric Concentrations of Molecular Clusters from ab initio Thermochemistry
Published on: April 8, 2020
Enhancement of energy decomposition analysis in fragment molecular orbital calculations
Sota Matsuoka1, Kota Sakakura2, Yoshinobu Akinaga3
1Department of Chemistry and Research Center for Smart Molecules, Faculty of Science, Rikkyo University, Tokyo, Japan.
Abstract:
Energy decomposition analysis is one of the most attractive features of fragment molecular orbital (FMO) calculations from the point of view of practical applications. Here we report some enhancements for PIEDA in the ABINIT-MP program. One is a separation of the dispersion-type stabilization from the electron correlation energy, traditionally referred to as the "dispersion interaction" (DI). Another is an alternative evaluation of the electrostatic (ES) interaction using the restrained electrostatic potential (RESP) charges. The GA:CT stacked base pair and the Trp-Cage miniprotein were used as illustrative examples.
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