Δ Self-Consistent Field Method for Natural Anthocyanidin Dyes.
J Chem Theory Comput
; 9(7): 3181-8, 2013 Jul 09.
Article
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| MEDLINE
| ID: mdl-26583995
ABSTRACT
We present an application of the Δ self-consistent field (ΔSCF) method, which we have implemented and tested in the DFT code CONQUEST, on the study of excited states of natural anthocyanidin dyes. We show that ΔSCF allows relaxation of the atomic structure for systems in excited states by following gradients on the excited Born-Oppenheimer surface. We compare the vertical excitation energies of some anthocyanidins in gas-phase to results from time-dependent density functional theory (TDDFT) and experiments. To reproduce a typical dye-sensitized solar cell interface, we adsorb cyanidin on TiO2 anatase (101), focusing on the shift of the lowest excitation energy due to the adsorption. We have found that important modifications occur in the excited state geometry of the adsorbed cyanidin.
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MEDLINE
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En
Revista:
J Chem Theory Comput
Año:
2013
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Article
País de afiliación:
Reino Unido