TY - JOUR
KW - paper
AU - Maurizia Palummo
AU - Conor Hogan
AU - Francesco Sottile
AU - Paolo Bagala
AU - Angel Rubio
AB - We 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., keywords e= ab initio calculations; Bethe-Salpeter equation; density functional theory; electron correlations; molecular electronic states; organic compounds; perturbation theory; triplet state; ultraviolet spectra; visible spectra
BT - The Journal of Chemical Physics
DO - 10.1063/1.3204938
M1 - 8
N2 - We 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., keywords e= ab initio calculations; Bethe-Salpeter equation; density functional theory; electron correlations; molecular electronic states; organic compounds; perturbation theory; triplet state; ultraviolet spectra; visible spectra
PB - AIP
PY - 2009
EP - 084102
T2 - The Journal of Chemical Physics
TI - Ab initio electronic and optical spectra of free-base porphyrins: The role of electronic correlation
UR - http://link.aip.org/link/?JCP/131/084102/1
VL - 131
ER -