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Título

Ab initio electronic and optical spectra of free-base porphyrins: The role of electronic correlation

AutorPalummo, Maurizia; Hogan, Conor; Sottile, Francesco; Bagalá, Paolo; Rubio, Angel
Fecha de publicación24-ago-2009
EditorAmerican Institute of Physics
CitaciónJournal of Chemical Physics 131(8): 084102 (2009)
ResumenWe present a theoretical investigation of electronic and optical properties of free-base porphyrins based on density functional theory and many-body perturbation theory. The electronic levels of free-base porphine (H2P) and its phenyl derivative, free-base tetraphenylporphyrin (H2TPP) are calculated using the ab initio GW approximation for the self-energy. The approach is found to yield results that compare favorably with the available photoemission spectra. The excitonic nature of the optical peaks is revealed by solving the Bethe–Salpeter equation, which provides an accurate description of the experimental absorption spectra. The lowest triplet transition energies are in good agreement with the measured values.
Descripción7 pages, 8 figures, 2 tables.
Versión del editorhttp://dx.doi.org/10.1063/1.3204938
URIhttp://hdl.handle.net/10261/21378
DOI10.1063/1.3204938
ISSN0021-9606
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