Hybrid TDDFT/MM approaches are very popular methods for describing electronic transitions of molecules in solution or embedded in more complex (bio)matrices. However, when combined with a polarisable force field some problems can appear depending on the type of environment response scheme that is used. In particular, specific a posteriori corrections are generally needed to accurately describe charge-transfer states implying a large reorganisation of the electron density in the excited state. Here, we present a possible strategy to solve this issue by introducing a ΔSCF formulation. As the ΔSCF strategy has the advantage of being intrinsically state specific, its coupling to a polarisable model is expected to be particularly suited to describe all cases where the standard, linear response, formulation of a polarisable TDDFT/MM approach is not sufficient.
A ΔSCF model for excited states within a polarisable embedding
Lipparini F.;Cupellini L.;Mennucci B.
2023-01-01
Abstract
Hybrid TDDFT/MM approaches are very popular methods for describing electronic transitions of molecules in solution or embedded in more complex (bio)matrices. However, when combined with a polarisable force field some problems can appear depending on the type of environment response scheme that is used. In particular, specific a posteriori corrections are generally needed to accurately describe charge-transfer states implying a large reorganisation of the electron density in the excited state. Here, we present a possible strategy to solve this issue by introducing a ΔSCF formulation. As the ΔSCF strategy has the advantage of being intrinsically state specific, its coupling to a polarisable model is expected to be particularly suited to describe all cases where the standard, linear response, formulation of a polarisable TDDFT/MM approach is not sufficient.File | Dimensione | Formato | |
---|---|---|---|
MolPhys_DeltaSCF_Postprint.pdf
Open Access dal 20/05/2024
Tipologia:
Documento in Post-print
Licenza:
Creative commons
Dimensione
1.53 MB
Formato
Adobe PDF
|
1.53 MB | Adobe PDF | Visualizza/Apri |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.