Artículo
Abstract:
Aggregation equilibrium and the fluorescence properties of hydroxoaluminium tricarboxymonoamidephthalocyanine adsorbed on microgranular cellulose have been studied at different dye loadings. Up to a concentration of nearly 3 × 10-6 mol phthalocyanine (g cellulose)-1 diffuse reflectance spectra may be interpreted on the basis of a simple monomer-dimer equilibrium. Monomer and dimer spectra are similar to the spectra of the monomeric dye in solution. The solid-state dimer spectrum is red-shifted with respect to that of the monomer and this is attributed to the coplanarity of dimers. Fluorescence spectra and quantum yields show typical effects of re-absorption and re-emission of light. In particular, the observed fluorescence quantum yields depend on concentration and span the range 0.29-0.07. To account for these effects as well as the effect of aggregation on fluorescence quantum yields and to obtain corrected fluorescence spectra a model based on the Kubelka-Munk theory of diffuse reflectance is developed. The application of this model to the case under study yields a true fluorescence quantum yield φ = 0.46 ± 0.02 in the whole range of concentrations, which is slightly higher than the value found for the same dye in dimethyl sulfoxide solution.
Registro:
| Documento: | Artículo |
| Título: | Modeling of fluorescence quantum yields of supported dyes: Aluminium carboxyphthalocyanine on cellulose |
| Autor: | Lagorio, M.G.; Dicelio, L.E.; Litter, M.I.; San Román, E. |
| Filiación: | INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina Unidad de Actividad Química, Comisión Nacional de Energía Atómica, Av. del Libertador 8250, 1429 Buenos Aires, Argentina |
| Año: | 1998 |
| Volumen: | 94 |
| Número: | 3 |
| Página de inicio: | 419 |
| Página de fin: | 425 |
| Título revista: | Journal of the Chemical Society - Faraday Transactions |
| ISSN: | 09565000 |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09565000_v94_n3_p419_Lagorio |
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Citas:
---------- APA ----------
Lagorio, M.G., Dicelio, L.E., Litter, M.I. & San Román, E. (1998) . Modeling of fluorescence quantum yields of supported dyes: Aluminium carboxyphthalocyanine on cellulose. Journal of the Chemical Society - Faraday Transactions, 94(3), 419-425.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09565000_v94_n3_p419_Lagorio [ ]
---------- CHICAGO ----------
Lagorio, M.G., Dicelio, L.E., Litter, M.I., San Román, E. "Modeling of fluorescence quantum yields of supported dyes: Aluminium carboxyphthalocyanine on cellulose" . Journal of the Chemical Society - Faraday Transactions 94, no. 3 (1998) : 419-425.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09565000_v94_n3_p419_Lagorio [ ]
---------- MLA ----------
Lagorio, M.G., Dicelio, L.E., Litter, M.I., San Román, E. "Modeling of fluorescence quantum yields of supported dyes: Aluminium carboxyphthalocyanine on cellulose" . Journal of the Chemical Society - Faraday Transactions, vol. 94, no. 3, 1998, pp. 419-425.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09565000_v94_n3_p419_Lagorio [ ]
---------- VANCOUVER ----------
Lagorio, M.G., Dicelio, L.E., Litter, M.I., San Román, E. Modeling of fluorescence quantum yields of supported dyes: Aluminium carboxyphthalocyanine on cellulose. 1998;94(3):419-425.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09565000_v94_n3_p419_Lagorio [ ]
