TY - JOUR
T1 - PHOTOPHYSICAL PROPERTIES OF 2‐NITRO‐5,10,15,20‐TETRA‐p‐TOLYLPORPHYRINS
AU - Gust, Devens
AU - Moore, Thomas A.
AU - Luttrull, David K.
AU - Seely, Gilbert R.
AU - Bittersmann, Edith
AU - Bensasson, René V.
AU - Rougée, Michel
AU - Land, Edward J.
AU - Schryver, F. C.De
AU - Auweraer, M. Van der
PY - 1990/4
Y1 - 1990/4
N2 - Abstract— Tetraarylporphyrins substituted with nitro groups at fipyrrolic positions are potential candidates for electron‐accepting pigments in model systems for photosynthesis. The photophysics of 2‐nitro‐5,10,15,20‐tetra‐p‐tolylporphyrin and its zinc analog have been studied in order to evaluate this potential. The ground state absorption spectrum, the triplet‐triplet absorption spectrum, the fluorescence emission spectrum, and associated photophysical parameters have been determined. The molecules have short singlet lifetimes and anomalous temperature‐ and solvent‐dependent emission spectra which are consistent with the formation of an intramolecular charge transfer state of the type P+ ‐NO2; in which the nitro group is twisted about its bond to the porphyrin, relative to the ground state conformation.
AB - Abstract— Tetraarylporphyrins substituted with nitro groups at fipyrrolic positions are potential candidates for electron‐accepting pigments in model systems for photosynthesis. The photophysics of 2‐nitro‐5,10,15,20‐tetra‐p‐tolylporphyrin and its zinc analog have been studied in order to evaluate this potential. The ground state absorption spectrum, the triplet‐triplet absorption spectrum, the fluorescence emission spectrum, and associated photophysical parameters have been determined. The molecules have short singlet lifetimes and anomalous temperature‐ and solvent‐dependent emission spectra which are consistent with the formation of an intramolecular charge transfer state of the type P+ ‐NO2; in which the nitro group is twisted about its bond to the porphyrin, relative to the ground state conformation.
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U2 - 10.1111/j.1751-1097.1990.tb01733.x
DO - 10.1111/j.1751-1097.1990.tb01733.x
M3 - Article
C2 - 2343060
AN - SCOPUS:0025407172
VL - 51
SP - 419
EP - 426
JO - Photochemistry and Photobiology
JF - Photochemistry and Photobiology
SN - 0031-8655
IS - 4
ER -