Abstract:
The dimerization of the diamide of zinc‐tetracarboxyphthalocyanine was studied spectro‐scopically in hexadecyltrimethylammonium bromide (CTAB) micelles at surfactant concentrations from 0.026 to 0.1 M and dye concentrations between 0.1 and 10 μM. The apparent dimerization constant in CTAB 0.1 M is 8.6 × 105M−1, while the intramicellar dimerization constant is 1.8 × 103. The dimer absorption spectrum was also obtained. Singlet molecular oxygen sensitization was studied by steady state photolysis using 1,3‐diphenylisobenzofurane as scavenger in 0.1 M CTAB. The usual sensitization mechanism is extended to include dimer reactions. Singlet molecular oxygen sensitization yields for monomer and dimer in the micelles are 0.7 and 0.1, respectively. With the reported values it is possible to calculate the average yield of singlet molecular oxygen production at any surfactant and dye concentrations. Copyright © 1991, Wiley Blackwell. All rights reserved
Registro:
Documento: |
Artículo
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Título: | CARBOXYLATED ZINC‐PHTHALOCYANINES–II DIMERIZATION AND SINGLET MOLECULAR OXYGEN SENSITIZATION IN HEXADECYLTRIMETHYLAMMONIUM BROMIDE MICELLES |
Autor: | Daraio, M.E.; Aramendía, P.F.; San Román, E.A.; Braslavsky, S.E. |
Filiación: | Departamento de Química Inorgánica, Analitica Y Química Fisica, Facultad de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Buenos Aires, 1428, Argentina Max-Planck-Institut für Strahlenchemie, Stiftstraße34-36, Mülheim A.D. Ruhr, W-4330, Germany
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Palabras clave: | cetrimide; indole derivative; organometallic compound; oxygen; singlet oxygen; zinc; zinc tetracarboxyphthalocyanine; article; chemistry; micelle; photochemistry; spectrophotometry; Cetrimonium Compounds; Indoles; Micelles; Organometallic Compounds; Oxygen; Photochemistry; Singlet Oxygen; Spectrophotometry; Support, Non-U.S. Gov't; Zinc |
Año: | 1991
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Volumen: | 54
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Número: | 3
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Página de inicio: | 367
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Página de fin: | 373
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DOI: |
http://dx.doi.org/10.1111/j.1751-1097.1991.tb02029.x |
Título revista: | Photochemistry and Photobiology
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Título revista abreviado: | Photochem. Photobiol.
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ISSN: | 00318655
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CAS: | cetrimide, 57-09-0, 6899-10-1, 8044-71-1; oxygen, 7782-44-7; zinc, 7440-66-6; Cetrimonium Compounds; cetrimonium, 6899-10-1; Indoles; Organometallic Compounds; Oxygen, 7782-44-7; Singlet Oxygen, 17778-80-2; zinc tetracarboxyphthalocyanine; Zinc, 7440-66-6
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Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v54_n3_p367_Daraio |
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Citas:
---------- APA ----------
Daraio, M.E., Aramendía, P.F., San Román, E.A. & Braslavsky, S.E.
(1991)
. CARBOXYLATED ZINC‐PHTHALOCYANINES–II DIMERIZATION AND SINGLET MOLECULAR OXYGEN SENSITIZATION IN HEXADECYLTRIMETHYLAMMONIUM BROMIDE MICELLES. Photochemistry and Photobiology, 54(3), 367-373.
http://dx.doi.org/10.1111/j.1751-1097.1991.tb02029.x---------- CHICAGO ----------
Daraio, M.E., Aramendía, P.F., San Román, E.A., Braslavsky, S.E.
"CARBOXYLATED ZINC‐PHTHALOCYANINES–II DIMERIZATION AND SINGLET MOLECULAR OXYGEN SENSITIZATION IN HEXADECYLTRIMETHYLAMMONIUM BROMIDE MICELLES"
. Photochemistry and Photobiology 54, no. 3
(1991) : 367-373.
http://dx.doi.org/10.1111/j.1751-1097.1991.tb02029.x---------- MLA ----------
Daraio, M.E., Aramendía, P.F., San Román, E.A., Braslavsky, S.E.
"CARBOXYLATED ZINC‐PHTHALOCYANINES–II DIMERIZATION AND SINGLET MOLECULAR OXYGEN SENSITIZATION IN HEXADECYLTRIMETHYLAMMONIUM BROMIDE MICELLES"
. Photochemistry and Photobiology, vol. 54, no. 3, 1991, pp. 367-373.
http://dx.doi.org/10.1111/j.1751-1097.1991.tb02029.x---------- VANCOUVER ----------
Daraio, M.E., Aramendía, P.F., San Román, E.A., Braslavsky, S.E. CARBOXYLATED ZINC‐PHTHALOCYANINES–II DIMERIZATION AND SINGLET MOLECULAR OXYGEN SENSITIZATION IN HEXADECYLTRIMETHYLAMMONIUM BROMIDE MICELLES. Photochem. Photobiol. 1991;54(3):367-373.
http://dx.doi.org/10.1111/j.1751-1097.1991.tb02029.x