Artículo

Murgida, D.H.; Aramendía, P.F.; Erra Balsells, R. "Photosensitized Oxidation of Oxopurines by Rose Bengal" (1998) Photochemistry and Photobiology. 68(4):467-473
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Abstract:

Photosensitized oxidations of oxopurines (OP) as caffeine, theophylline, theobromine and 1,3,7-trimethyluric acid (TMU) by Rose Bengal were investigated. In all cases photooxidations occur by a type II mechanism. Reactive and nonreactive 1O2 quenching rate constants by OP were determined in different solvents. Based on the correlations of the rate constants with different solvent parameters (α, β, ET[30], AN, DN, π*, ∈), the initial formation of an exciplex between 1O2 and OP is proposed that evolves to a zwitterionic transition state. Some reaction products were characterized, among them 3-methyl-5-(methylamine)-1,5-dehydrohydantoin was obtained as the main photooxidation product of TMU. A reaction mechanism is proposed for the formation of this and other reaction products.

Registro:

Documento: Artículo
Título:Photosensitized Oxidation of Oxopurines by Rose Bengal
Autor:Murgida, D.H.; Aramendía, P.F.; Erra Balsells, R.
Filiación:Depto. de Quim. Orgánica, Universidad de Buenos Aires, Buenos Aires, Argentina
INQUIMAE, Depto. Quim. Inorg., Analitica Q., Universidad de Buenos Aires, Buenos Aires, Argentina
Depto. de Quim. Orgánica, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Año:1998
Volumen:68
Número:4
Página de inicio:467
Página de fin:473
DOI: http://dx.doi.org/10.1111/j.1751-1097.1998.tb02501.x
Título revista:Photochemistry and Photobiology
Título revista abreviado:Photochem. Photobiol.
ISSN:00318655
CODEN:PHCBA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v68_n4_p467_Murgida

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Citas:

---------- APA ----------
Murgida, D.H., Aramendía, P.F. & Erra Balsells, R. (1998) . Photosensitized Oxidation of Oxopurines by Rose Bengal. Photochemistry and Photobiology, 68(4), 467-473.
http://dx.doi.org/10.1111/j.1751-1097.1998.tb02501.x
---------- CHICAGO ----------
Murgida, D.H., Aramendía, P.F., Erra Balsells, R. "Photosensitized Oxidation of Oxopurines by Rose Bengal" . Photochemistry and Photobiology 68, no. 4 (1998) : 467-473.
http://dx.doi.org/10.1111/j.1751-1097.1998.tb02501.x
---------- MLA ----------
Murgida, D.H., Aramendía, P.F., Erra Balsells, R. "Photosensitized Oxidation of Oxopurines by Rose Bengal" . Photochemistry and Photobiology, vol. 68, no. 4, 1998, pp. 467-473.
http://dx.doi.org/10.1111/j.1751-1097.1998.tb02501.x
---------- VANCOUVER ----------
Murgida, D.H., Aramendía, P.F., Erra Balsells, R. Photosensitized Oxidation of Oxopurines by Rose Bengal. Photochem. Photobiol. 1998;68(4):467-473.
http://dx.doi.org/10.1111/j.1751-1097.1998.tb02501.x