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.

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.

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
Primo
;
M. Pizzotti
Secondo
;
R. Ugo;T. Morotti;P. Mussini
Ultimo
2005

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.
Settore CHIM/01 - Chimica Analitica
Settore CHIM/03 - Chimica Generale e Inorganica
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/14865
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