期刊
JOURNAL OF CHEMICAL PHYSICS
卷 157, 期 10, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0099854
关键词
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资金
- Alexander von Humboldt Foundation within the framework of the Sofja Kovalevskaja Award
- German Federal Ministry of Education and Research
- European Union Seventh Framework Program [291763]
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [EG397/4-1]
- Gauss Center for Supercomputing e.V. through the John von Neumann Institute for Computing (NIC)
- Technical University of Munich-Institute for Advanced Study
- German Excellence Initiative
Accurate non-adiabatic couplings can be calculated using the optimally tuned range-separated hybrid functionals within the framework of linear-response time-dependent density functional theory, providing an efficient alternative to wave-function-based techniques in the modeling of radiationless decay mechanisms in photochemical processes.
Precise theoretical calculations of non-adiabatic couplings, which describe the interaction between two Born-Oppenheimer surfaces, are important for the modeling of radiationless decay mechanisms in photochemical processes. Here, we demonstrate that accurate non-adiabatic couplings can be calculated in the framework of linear-response time-dependent density functional theory by using non-empirical, optimally tuned range-separated hybrid (OT-RSH) functionals. We focus on molecular radicals, in which ultrafast non-radiative decay plays a crucial role, to find that the OT-RSH functional compares well to wave-function-based reference data and competes with the accuracy of semi-empirical CAM-B3LYP calculations. Our findings show that the OT-RSH approach yields very accurate non-adiabatic couplings and, therefore, provides a computationally efficient alternative to wave-function-based techniques. (C) 2022 Author(s).
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