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Abstract:

This work describes a systematic comparison of oxygen and sulfur as covalent linkers on octasubstituted zinc(II) phthalocyaninates. Most photophysical parameters that make phthalocyanines technologically relevant, e.g. molar absorption coefficients, fluorescence, triplet and singlet oxygen quantum yields, are essentially unaffected by the substitution. The energy content of the first triplet state was observed to be close to the first singlet state of molecular oxygen for both spacers, as follows from photoacoustic determinations. Nonetheless, a bathochromic shift of 30 nm in the absorption and emission maxima, and of 60 nm in the triplet-triplet absorption spectra were observed when alkyloxyl and alkylsulfanyl moieties were alternatively present. Fluorescence quantum yields proved to be much more sensitive towards aggregation than the absorption spectra. Therefore, a novel fluorescence data analysis provided aggregation parameters and photophysical properties of the monomeric species. It was observed that the tendency towards dimerization is slightly higher with sulfur linkers. These results set a foundation for the rational design of conveniently substituted phthalocyaninates with different connectors between the macrocycle and the side chains. © The Royal Society of Chemistry and Owner Societies.

Registro:

Documento: Artículo
Título:Comparative photophysical investigation of oxygen and sulfur as covalent linkers on octaalkylamino substituted zinc(II) phthalocyanines
Autor:Strassert, C.A.; Bilmes, G.M.; Awruch, J.; Dicelio, L.E.
Filiación:INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica Y Química Física, Pabellón II, C1428EHA, Ciudad Autónoma de Buenos Aires, Argentina
Departamento de Química Orgánica, Facultad de Farmacia Y Bioquímica, Universidad de Buenos Aires, Junín 956, C1113AAD, Ciudad Autónoma de Buenos Aires, Argentina
CIOp-CONICET-CIC, Universidad Nacional de La Plata, Casilla de Correo 124, 1900, La Plata, Argentina
Palabras clave:oxygen; phthalocyanine derivative; sulfur; zinc derivative; absorption spectroscopy; article; chemical structure; comparative study; energy; fluorescence; photochemistry; priority journal; Alkylation; Amines; Cross-Linking Reagents; Indoles; Molecular Structure; Oxygen; Photochemistry; Singlet Oxygen; Spectrophotometry; Sulfur; Zinc Compounds
Año:2008
Volumen:7
Número:6
Página de inicio:738
Página de fin:747
DOI: http://dx.doi.org/10.1039/b802709a
Título revista:Photochemical and Photobiological Sciences
Título revista abreviado:Photochem. Photobiol. Sci.
ISSN:1474905X
CODEN:PPSHC
CAS:oxygen, 7782-44-7; sulfur, 13981-57-2, 7704-34-9; Amines; Cross-Linking Reagents; Indoles; Oxygen, 7782-44-7; phthalocyanine, 574-93-6; Singlet Oxygen, 17778-80-2; Sulfur, 7704-34-9; Zinc Compounds
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1474905X_v7_n6_p738_Strassert

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Citas:

---------- APA ----------
Strassert, C.A., Bilmes, G.M., Awruch, J. & Dicelio, L.E. (2008) . Comparative photophysical investigation of oxygen and sulfur as covalent linkers on octaalkylamino substituted zinc(II) phthalocyanines. Photochemical and Photobiological Sciences, 7(6), 738-747.
http://dx.doi.org/10.1039/b802709a
---------- CHICAGO ----------
Strassert, C.A., Bilmes, G.M., Awruch, J., Dicelio, L.E. "Comparative photophysical investigation of oxygen and sulfur as covalent linkers on octaalkylamino substituted zinc(II) phthalocyanines" . Photochemical and Photobiological Sciences 7, no. 6 (2008) : 738-747.
http://dx.doi.org/10.1039/b802709a
---------- MLA ----------
Strassert, C.A., Bilmes, G.M., Awruch, J., Dicelio, L.E. "Comparative photophysical investigation of oxygen and sulfur as covalent linkers on octaalkylamino substituted zinc(II) phthalocyanines" . Photochemical and Photobiological Sciences, vol. 7, no. 6, 2008, pp. 738-747.
http://dx.doi.org/10.1039/b802709a
---------- VANCOUVER ----------
Strassert, C.A., Bilmes, G.M., Awruch, J., Dicelio, L.E. Comparative photophysical investigation of oxygen and sulfur as covalent linkers on octaalkylamino substituted zinc(II) phthalocyanines. Photochem. Photobiol. Sci. 2008;7(6):738-747.
http://dx.doi.org/10.1039/b802709a