A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles

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 nanopar...

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Autores principales: López Zeballos, N.C., García Vior, M.C., Awruch, J., Dicelio, L.E.
Formato: JOUR
Materias:
Aggregation
Fluorescence
Mesoporous silica nanoparticles
Phthalocyanine release
Singlet oxygen
Zinc(II) phthalocyanines
Agglomeration
Isomers
Nitrogen compounds
Oxygen
Ultraviolet visible spectroscopy
Comparative studies
Photophysical studies
Steric hindrance effects
UV-vis spectroscopy
Zinc phthalocyanines
Zinc compounds
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01437208_v113_n_p145_LopezZeballos
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01437208_v113_n_p145_LopezZeballos
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spelling todo:paper_01437208_v113_n_p145_LopezZeballos2023-10-03T14:59:24Z A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles López Zeballos, N.C. García Vior, M.C. Awruch, J. Dicelio, L.E. 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 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. Fil:Dicelio, L.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01437208_v113_n_p145_LopezZeballos
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 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
spellingShingle 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
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
topic_facet 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
description 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.
format JOUR
author López Zeballos, N.C.
García Vior, M.C.
Awruch, J.
Dicelio, L.E.
author_facet López Zeballos, N.C.
García Vior, M.C.
Awruch, J.
Dicelio, L.E.
author_sort López Zeballos, N.C.
title A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles
title_short A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles
title_full A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles
title_fullStr A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles
title_full_unstemmed A comparative study of peripheral and non-peripheral zinc (II) phthalocyanines incorporated into mesoporous silica nanoparticles
title_sort comparative study of peripheral and non-peripheral zinc (ii) phthalocyanines incorporated into mesoporous silica nanoparticles
url http://hdl.handle.net/20.500.12110/paper_01437208_v113_n_p145_LopezZeballos
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