Synthesis, electronic characterization and significant second-order non-linear optical responses of meso-tetraphenylporphyrins and their ZnII complexes carrying a push or pull group in the β pyrrolic position
Articolo
Data di Pubblicazione:
2005
Citazione:
Synthesis, electronic characterization and significant second-order non-linear optical responses of meso-tetraphenylporphyrins and their ZnII complexes carrying a push or pull group in the β pyrrolic position / E. Annoni, M. Pizzotti, R. Ugo, S. Quici, T. Morotti, M. Bruschi, P. Mussini. - In: EUROPEAN JOURNAL OF INORGANIC CHEMISTRY. - ISSN 1434-1948. - 2005:19(2005), pp. 3857-3874.
Abstract:
This work describes the synthesis and characterisation by electronic absorption spectroscopy, cyclic voltammetry and
by a solvatochromic investigation of meso-tetraphenylporphyrins and their Zn(II) complexes substituted at the β pyrrolic position by a pseudo-linear, π-delocalised organic linker carrying either an electron-withdrawing (pull) or electron-donating (push) group. The second-order NLO response of these push-pull porphyrinic chromophores has been investigated
by the EFISH technique working with a non-resonant incident wavelength of 1.907 μm. The porphyrin ring substituted at the β pyrrolic position by an electron-acceptor π-system behaves as a significant donor group, comparable to a ferrocenyl group or to a phthalocyanine. Unexpectedly, the porphyrin ring substituted at the β pyrrolic position with an electron-donor π-system shows a larger and significant second-
order NLO response.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
E. Annoni, M. Pizzotti, R. Ugo, S. Quici, T. Morotti, M. Bruschi, P. Mussini
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