Photophysics of supported dyes: Phthalocyanine on silanized silica

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Aluminum tetracarboxyphthalocyanine is adsorbed onto silanized silica particles at different dye to particle ratios. Diffuse reflectance spectra are measured and the equilibrium between dye monomers and aggregates is studied. Between 4.0 × 10-8 and 2.0 × 10-6 mol of dye g-1 of support, a simple dime...

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Detalles Bibliográficos
Autor principal: Iriel, A.
Otros Autores: Lagorio, M.G, Dicelio, L.E, San Román, E.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2002
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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024 7 |2 scopus  |a 2-s2.0-0036158337 
040 |a Scopus  |b spa  |c AR-BaUEN  |d AR-BaUEN 
030 |a PPCPF 
100 1 |a Iriel, A. 
245 1 0 |a Photophysics of supported dyes: Phthalocyanine on silanized silica 
260 |c 2002 
270 1 0 |m San Román, E.; Facultad Ciencias Exactas Naturales, Universidad de Buenos Aires, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina; email: esr@qi.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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504 |a Lagorio, M.G., Dicelio, L.E., Litter, M.I., San Román, E., (1998) J. Chem. Soc., Faraday Trans., 94, p. 419 
504 |a Lagorio, M.G., San Román, E., Zeug, A., Zimmermann, J., Röder, B., (2001) Phys. Chem. Chem. Phys., 3, p. 1524 
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504 |a Amore, S., Lagorio, M.G., Dicelio, L.E., San Román, E., (2001) Prog. React. Kinet. Mech., 26, p. 159 
504 |a Bourdelande, J.L., Karzazi, M., Dicelio, L.E., Litter, M.I., Marqués Tura, G., San Román, E., Vinent, V., (1997) J. Photochem. Photobiol. A: Chem., 108, p. 273 
504 |a Lagorio, M.G., Dicelio, L.E., San Román, E., (1993) J. Photochem. Photobiol. A: Chem., 72, p. 153 
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504 |a Wendlandt, W.W., Hecht, H.G., (1966) Reflectance Spectroscopy, , Wiley, New York 
504 |a San Román, E., González, M.C., (1989) J. Phys. Chem., 93, p. 3532 
504 |a Kraljic, I., El Mohsni, S., (1978) Photochem. Photobiol., 28, p. 577 
504 |a Wilkinson, F., Philip Helman, W., Ross, A.B., (1993) J. Phys. Chem. Ref. Data, 22, p. 113 
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520 3 |a Aluminum tetracarboxyphthalocyanine is adsorbed onto silanized silica particles at different dye to particle ratios. Diffuse reflectance spectra are measured and the equilibrium between dye monomers and aggregates is studied. Between 4.0 × 10-8 and 2.0 × 10-6 mol of dye g-1 of support, a simple dimerization equilibrium explains experimental results. Fluorescence spectra and quantum yields are calculated and corrected for light absorption by non-fluorescent dimers and reabsorption of emitted radiation. Once corrected, fluorescence quantum yields are of the same order of magnitude than in solution. Absorption spectra are also obtained for suspensions of the same materials in water. The hydrophilic environment enhances aggregation dramatically. Singlet oxygen quantum yields measured in suspension are lower than those found for the same phthalocyanine in solution of DMSO. Results are compared with those previously obtained for similar materials.  |l eng 
593 |a Facultad Ciencias Exactas Naturales, Universidad de Buenos Aires, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina 
690 1 0 |a ALUMINUM DERIVATIVE 
690 1 0 |a DIMETHYL SULFOXIDE 
690 1 0 |a DYE 
690 1 0 |a MONOMER 
690 1 0 |a PHTHALOCYANINE 
690 1 0 |a SILANE DERIVATIVE 
690 1 0 |a SILICON DIOXIDE 
690 1 0 |a SINGLET OXYGEN 
690 1 0 |a WATER 
690 1 0 |a ADSORPTION 
690 1 0 |a AQUEOUS SOLUTION 
690 1 0 |a ARTICLE 
690 1 0 |a CALCULATION 
690 1 0 |a DIFFUSE REFLECTANCE SPECTROSCOPY 
690 1 0 |a DIMERIZATION 
690 1 0 |a HYDROPHILICITY 
690 1 0 |a MEASUREMENT 
690 1 0 |a PHYSICAL CHEMISTRY 
690 1 0 |a QUANTUM CHEMISTRY 
690 1 0 |a RADIATION 
690 1 0 |a SPECTROFLUOROMETRY 
690 1 0 |a SUSPENSION 
700 1 |a Lagorio, M.G. 
700 1 |a Dicelio, L.E. 
700 1 |a San Román, E. 
773 0 |d 2002  |g v. 4  |h pp. 224-231  |k n. 2  |p Phys. Chem. Chem. Phys.  |x 14639076  |t Physical Chemistry Chemical Physics 
856 4 1 |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-0036158337&doi=10.1039%2fb108542p&partnerID=40&md5=f9a58359a5d1f26eac062df3e384b50f  |y Registro en Scopus 
856 4 0 |u https://doi.org/10.1039/b108542p  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_14639076_v4_n2_p224_Iriel  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14639076_v4_n2_p224_Iriel  |y Registro en la Biblioteca Digital 
961 |a paper_14639076_v4_n2_p224_Iriel  |b paper  |c PE 
962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
963 |a VARI 

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