Automatized protocol and interface to simulate QM/MM time-resolved transient absorption at TD-DFT level with COBRAMM.
QM/MM
TD-DFT
trajectory surface hopping
transient absorption
ultrafast spectroscopy
Journal
Journal of computational chemistry
ISSN: 1096-987X
Titre abrégé: J Comput Chem
Pays: United States
ID NLM: 9878362
Informations de publication
Date de publication:
15 09 2022
15 09 2022
Historique:
revised:
07
06
2022
received:
02
05
2022
accepted:
10
06
2022
pubmed:
12
7
2022
medline:
30
7
2022
entrez:
11
7
2022
Statut:
ppublish
Résumé
We present a series of new implementations that we recently introduced in COBRAMM, the open-source academic software developed in our group. The goal of these implementations is to offer an automatized workflow and interface to simulate time-resolved transient absorption (TA) spectra of medium-to-big chromophore embedded in a complex environment. Therefore, the excited states absorption and the stimulated emission are simulated along nonadiabatic dynamics performed with trajectory surface hopping. The possibility of treating systems from medium to big size is given by the use of time-dependent density functional theory (TD-DFT) and the presence of the environment is taken into account employing a hybrid quantum mechanics/molecular mechanics (QM/MM) scheme. The full implementation includes a series of auxiliary scripts to properly setup the QM/MM system, the calculation of the wavefunction overlap along the dynamics for the propagation, the evaluation of the transition dipole moment at linear response TD-DFT level, and scripts to setup, run and analyze the TA from an ensemble of trajectories. Altogether, we believe that our implementation will open the door to the easily simulate the time-resolved TA of systems so far computationally inaccessible.
Identifiants
pubmed: 35815854
doi: 10.1002/jcc.26966
pmc: PMC9544370
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1641-1655Subventions
Organisme : European Union's Horizon 2020
ID : 814492
Informations de copyright
© 2022 The Authors. Journal of Computational Chemistry published by Wiley Periodicals LLC.
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