We investigated the optical properties of the saturable absorber 3,3′-diethyloxadicarbocyanine iodide incorporated in a matrix of silica-gel glass by the sol-gel technique. Absorption, emission, and fluorescence lifetime were studied as functions of the densification procedures. With respect to the liquid solutions, we observed a strong quenching of the P-isomer luminescence and an increase of the N-isomer fluorescence lifetime. These effects are ascribed to a restriction on the molecular photoisomerization rearrangement caused by the rigidity of the silica cage. Moreover, entrapping reduces intermolecular concentration effects. Finally, different from other glass-embedded dyes, both the absorption and the emission are blue-shifted by about 20 nm. © 1997 American Institute of Physics.

Casalboni, M., Senesi, R., Prosposito, P., DE MATTEIS, F., Pizzoferrato, R. (1997). Rigid-cage effects on the optical properties of the dye 3,3′ -diethyloxadicarbocyanine incorporated in silica-gel glasses. APPLIED PHYSICS LETTERS, 70(22), 2969-2971.

Rigid-cage effects on the optical properties of the dye 3,3′ -diethyloxadicarbocyanine incorporated in silica-gel glasses

CASALBONI, MAURO;SENESI, ROBERTO;PROSPOSITO, PAOLO;DE MATTEIS, FABIO;PIZZOFERRATO, ROBERTO
1997-01-01

Abstract

We investigated the optical properties of the saturable absorber 3,3′-diethyloxadicarbocyanine iodide incorporated in a matrix of silica-gel glass by the sol-gel technique. Absorption, emission, and fluorescence lifetime were studied as functions of the densification procedures. With respect to the liquid solutions, we observed a strong quenching of the P-isomer luminescence and an increase of the N-isomer fluorescence lifetime. These effects are ascribed to a restriction on the molecular photoisomerization rearrangement caused by the rigidity of the silica cage. Moreover, entrapping reduces intermolecular concentration effects. Finally, different from other glass-embedded dyes, both the absorption and the emission are blue-shifted by about 20 nm. © 1997 American Institute of Physics.
1997
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore FIS/01 - FISICA SPERIMENTALE
Settore FIS/03 - FISICA DELLA MATERIA
Settore ING-IND/23 - CHIMICA FISICA APPLICATA
English
Physics and Astronomy (miscellaneous)
Casalboni, M., Senesi, R., Prosposito, P., DE MATTEIS, F., Pizzoferrato, R. (1997). Rigid-cage effects on the optical properties of the dye 3,3′ -diethyloxadicarbocyanine incorporated in silica-gel glasses. APPLIED PHYSICS LETTERS, 70(22), 2969-2971.
Casalboni, M; Senesi, R; Prosposito, P; DE MATTEIS, F; Pizzoferrato, R
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/129690
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