A large two photon absorption (TPA) cross section of about 4000 GM is measured by Z-scan technique for a push-pull A-π-D Zn(II) porphyrin complex disubstituted in the meso position with strong donor and acceptor moieties. This result is compared to the lower TPA cross section of Zn(II) porphyrinates mono-substituted in the meso or β pyrrolic position with the same donor or acceptor substituents. The origin of such trend is discussed in terms of charge transfer processes, π delocalisation and resonance pathways.
Large Two Photon Absorption Crss Section of asymmetric Zn(II) Porphyrin Complexes Substituted in the meso or b pyrrolic position by –C=C-C6H4X moieties (X=NMe2, NO2) / E. Collini, S. Mazzuccato, M. Zerbetto, C. Ferrante, R. Bozio, M. Pizzotti, F. Tessore, R. Ugo. - In: CHEMICAL PHYSICS LETTERS. - ISSN 0009-2614. - 454:1/3(2008), pp. 70-74. [10.1016/j.cplett.2008.01.054]
Large Two Photon Absorption Crss Section of asymmetric Zn(II) Porphyrin Complexes Substituted in the meso or b pyrrolic position by –C=C-C6H4X moieties (X=NMe2, NO2).
M. Pizzotti;F. TessorePenultimo
;R. UgoUltimo
2008
Abstract
A large two photon absorption (TPA) cross section of about 4000 GM is measured by Z-scan technique for a push-pull A-π-D Zn(II) porphyrin complex disubstituted in the meso position with strong donor and acceptor moieties. This result is compared to the lower TPA cross section of Zn(II) porphyrinates mono-substituted in the meso or β pyrrolic position with the same donor or acceptor substituents. The origin of such trend is discussed in terms of charge transfer processes, π delocalisation and resonance pathways.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
