On the Role of Charge Transfer in Many-Body Non-Covalent Interactions

0574076 - ÚOCHB 2024 RIV US eng J - Článek v odborném periodiku
Řezáč, Jan - de la Lande, A.
On the Role of Charge Transfer in Many-Body Non-Covalent Interactions.
ChemPhysChem. Roč. 24, č. 18 (2023), č. článku e202300329. ISSN 1439-4235. E-ISSN 1439-7641
Grant CEP: GA MŠMT(CZ) 8J20FR003
Institucionální podpora: RVO:61388963
Klíčová slova: charge transfer * density functional theory * interaction energy decomposition * many-body interactions * non-covalent interactions
Obor OECD: Physical chemistry
Impakt faktor: 2.9, rok: 2022
Způsob publikování: Open access
https://doi.org/10.1002/cphc.202300329

Charge transfer is one of the mechanisms involved in non-covalent interactions. In molecular dimers, its contribution to pairwise interaction energies has been studied extensively using a variety of interaction energy decomposition schemes. In polar interactions such as hydrogen bonds, it can contribute ten or several tens of percent of the interaction energy. Less is known about its importance in higher-order interactions in many-body systems, mainly because of the lack of methods applicable to this problem. In this work, we extend our method for the quantification of the charge-transfer energy based on constrained DFT to many-body cases and apply it to model trimers extracted from molecular crystals. Our calculations show that charge transfer can account for a large fraction of the total three-body interaction energy. This also has implications for DFT calculations of many-body interactions in general as it is known that many DFT functionals struggle to describe charge-transfer effects correctly.
Trvalý link: https://hdl.handle.net/11104/0344440