Photoexcitation of a light-harvesting supramolecular triad: a time-dependent DFT study.
J Phys Chem B
; 113(16): 5345-9, 2009 Apr 23.
Article
em En
| MEDLINE
| ID: mdl-19331406
ABSTRACT
We present the first time-dependent density functional theory (TDDFT) calculation on a light-harvesting triad carotenoid-diaryl-porphyrin-C(60). Besides the numerical challenge that the ab initio study of the electronic structure of such a large system presents, we show that TDDFT is able to provide an accurate description of the excited-state properties of the system. In particular, we calculate the photoabsorption spectrum of the supramolecular assembly, and we provide an interpretation of the photoexcitation mechanism in terms of the properties of the component moieties. The spectrum is in good agreement with experimental data, and provides useful insight on the photoinduced charge-transfer mechanism which characterizes the system.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Porfirinas
/
Simulação por Computador
/
Carotenoides
/
Fulerenos
/
Luz
/
Modelos Químicos
Tipo de estudo:
Prognostic_studies
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article