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Abstract:

The properties of two new lipophilic isomeric phthalocyanines 2,9(10),16(17),23(24)-tetrakis-[(2-dimethylamino)ethylsulfanyl] phthalocyaninatozinc(II) (Pc9) and 1,8(11),15(18),22(25)-tetrakis[(2- dimethylamino)ethylsulfanyl]phthalocyaninatozinc(II) (Pc10), incorporated into mesoporous silica nanoparticles were investigated. The photophysical studies showed that these dyes had a lower aggregation when incorporated into mesoporous silica nanoparticles than when incorporated into other carriers. Both systems were able to generate singlet oxygen, although with values lower than those obtained in homogeneous media, suggesting that a small portion of the phthalocynines was incorporated in an aggregated form. The incorporation efficiency determined by UV-Vis spectroscopy exceeded 99%. A higher core release was obtained for the non-peripheral isomer (Pc10). This could be attributed to the steric hindrance effect of the substituents as compared with the peripheral substituted isomer (Pc9). © 2014 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles
Autor:López Zeballos, N.C.; García Vior, M.C.; Awruch, J.; Dicelio, L.E.
Filiación:INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, 1428 Buenos Aires, Argentina
Departamento de Química Orgánica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 956, 1113 Buenos Aires, Argentina
Palabras clave:Aggregation; Fluorescence; Mesoporous silica nanoparticles; Phthalocyanine release; Singlet oxygen; Zinc(II) phthalocyanines; Agglomeration; Fluorescence; Isomers; Nitrogen compounds; Oxygen; Ultraviolet visible spectroscopy; Fluorescence; Comparative studies; Mesoporous silica nanoparticles; Photophysical studies; Phthalocyanine release; Singlet oxygen; Steric hindrance effects; UV-vis spectroscopy; Zinc phthalocyanines; Zinc compounds; Agglomeration
Año:2015
Volumen:113
Página de inicio:145
Página de fin:150
DOI: http://dx.doi.org/10.1016/j.dyepig.2014.08.004
Título revista:Dyes and Pigments
Título revista abreviado:Dyes Pigm.
ISSN:01437208
CODEN:DYPID
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01437208_v113_n_p145_LopezZeballos

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Citas:

---------- APA ----------
López Zeballos, N.C., García Vior, M.C., Awruch, J. & Dicelio, L.E. (2015) . A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles. Dyes and Pigments, 113, 145-150.
http://dx.doi.org/10.1016/j.dyepig.2014.08.004
---------- CHICAGO ----------
López Zeballos, N.C., García Vior, M.C., Awruch, J., Dicelio, L.E. "A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles" . Dyes and Pigments 113 (2015) : 145-150.
http://dx.doi.org/10.1016/j.dyepig.2014.08.004
---------- MLA ----------
López Zeballos, N.C., García Vior, M.C., Awruch, J., Dicelio, L.E. "A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles" . Dyes and Pigments, vol. 113, 2015, pp. 145-150.
http://dx.doi.org/10.1016/j.dyepig.2014.08.004
---------- VANCOUVER ----------
López Zeballos, N.C., García Vior, M.C., Awruch, J., Dicelio, L.E. A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles. Dyes Pigm. 2015;113:145-150.
http://dx.doi.org/10.1016/j.dyepig.2014.08.004