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Abstract:

The photophysics of purinic compounds (purine, 6-methylpurine, 6-aminopurine [adenine], 6-chloropurine, 6-methoxypurine) and theophylline in acetonitrile solu tion were studied by pulsed laser-induced optoacoustic spectroscopy (LIOAS) exciting at 266 nm. The effect of O2, Xe and MnCl2 on the photophysical behavior of these compounds was studied; as well, the formation quantum yield of purine and 6-methylpurine triplet states were determined, with φT = 0.88 ±0.03 for both compounds. Multiphotonic and depletion processes were observed at high laser fluences. In order to explain this behavior, theoretical UV-visible absorption electronic spectra from both the S0 and S1 state have been calculated for purines and theophylline by using the semiempirical PM3 and ZINDO/S methods.

Registro:

Documento: Artículo
Título:A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy
Autor:Murgida, D.H.; Bilmes, G.M.; Erra-Balsells, R.
Filiación:Depto. de Quim. Orgánica, Fac. de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Ctro. de Invest. Opticas-CIOp, La Plata, Argentina
Depto. de Quim. Orgánica, Fac. de Ciencias Exactas Y Naturales, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:purine derivative; theophylline; article; chemistry; laser; methodology; photochemistry; physical chemistry; spectrophotometry; Chemistry, Physical; Lasers; Photochemistry; Purines; Spectrophotometry; Theophylline
Año:1996
Volumen:64
Número:5
Página de inicio:777
Página de fin:784
DOI: http://dx.doi.org/10.1111/j.1751-1097.1996.tb01834.x
Título revista:Photochemistry and Photobiology
Título revista abreviado:Photochem. Photobiol.
ISSN:00318655
CODEN:PHCBA
CAS:Purines; Theophylline, 58-55-9
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v64_n5_p777_Murgida

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Citas:

---------- APA ----------
Murgida, D.H., Bilmes, G.M. & Erra-Balsells, R. (1996) . A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy. Photochemistry and Photobiology, 64(5), 777-784.
http://dx.doi.org/10.1111/j.1751-1097.1996.tb01834.x
---------- CHICAGO ----------
Murgida, D.H., Bilmes, G.M., Erra-Balsells, R. "A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy" . Photochemistry and Photobiology 64, no. 5 (1996) : 777-784.
http://dx.doi.org/10.1111/j.1751-1097.1996.tb01834.x
---------- MLA ----------
Murgida, D.H., Bilmes, G.M., Erra-Balsells, R. "A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy" . Photochemistry and Photobiology, vol. 64, no. 5, 1996, pp. 777-784.
http://dx.doi.org/10.1111/j.1751-1097.1996.tb01834.x
---------- VANCOUVER ----------
Murgida, D.H., Bilmes, G.M., Erra-Balsells, R. A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy. Photochem. Photobiol. 1996;64(5):777-784.
http://dx.doi.org/10.1111/j.1751-1097.1996.tb01834.x