A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy

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 photoph...

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Autores principales:	Murgida, Daniel Horacio, Bilmes, Gabriel, Erra Balsells, Rosa
Publicado:	1996
Materias:	purine derivative theophylline article chemistry laser methodology photochemistry physical chemistry spectrophotometry Chemistry, Physical Lasers Photochemistry Purines Spectrophotometry Theophylline
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v64_n5_p777_Murgida http://hdl.handle.net/20.500.12110/paper_00318655_v64_n5_p777_Murgida
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00318655_v64_n5_p777_Murgida
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spelling	paper:paper_00318655_v64_n5_p777_Murgida2023-06-08T14:57:17Z A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy Murgida, Daniel Horacio Bilmes, Gabriel Erra Balsells, Rosa purine derivative theophylline article chemistry laser methodology photochemistry physical chemistry spectrophotometry Chemistry, Physical Lasers Photochemistry Purines Spectrophotometry Theophylline 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. Fil:Murgida, D.H. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bilmes, G.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Erra-Balsells, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1996 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v64_n5_p777_Murgida http://hdl.handle.net/20.500.12110/paper_00318655_v64_n5_p777_Murgida
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	purine derivative theophylline article chemistry laser methodology photochemistry physical chemistry spectrophotometry Chemistry, Physical Lasers Photochemistry Purines Spectrophotometry Theophylline
spellingShingle	purine derivative theophylline article chemistry laser methodology photochemistry physical chemistry spectrophotometry Chemistry, Physical Lasers Photochemistry Purines Spectrophotometry Theophylline Murgida, Daniel Horacio Bilmes, Gabriel Erra Balsells, Rosa A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy
topic_facet	purine derivative theophylline article chemistry laser methodology photochemistry physical chemistry spectrophotometry Chemistry, Physical Lasers Photochemistry Purines Spectrophotometry Theophylline
description	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.
author	Murgida, Daniel Horacio Bilmes, Gabriel Erra Balsells, Rosa
author_facet	Murgida, Daniel Horacio Bilmes, Gabriel Erra Balsells, Rosa
author_sort	Murgida, Daniel Horacio
title	A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy
title_short	A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy
title_full	A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy
title_fullStr	A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy
title_full_unstemmed	A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy
title_sort	photophysical study of purines and theophylline by using laser-induced optoacoustic spectroscopy
publishDate	1996
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00318655_v64_n5_p777_Murgida http://hdl.handle.net/20.500.12110/paper_00318655_v64_n5_p777_Murgida
work_keys_str_mv	AT murgidadanielhoracio aphotophysicalstudyofpurinesandtheophyllinebyusinglaserinducedoptoacousticspectroscopy AT bilmesgabriel aphotophysicalstudyofpurinesandtheophyllinebyusinglaserinducedoptoacousticspectroscopy AT errabalsellsrosa aphotophysicalstudyofpurinesandtheophyllinebyusinglaserinducedoptoacousticspectroscopy AT murgidadanielhoracio photophysicalstudyofpurinesandtheophyllinebyusinglaserinducedoptoacousticspectroscopy AT bilmesgabriel photophysicalstudyofpurinesandtheophyllinebyusinglaserinducedoptoacousticspectroscopy AT errabalsellsrosa photophysicalstudyofpurinesandtheophyllinebyusinglaserinducedoptoacousticspectroscopy
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A Photophysical Study of Purines and Theophylline by Using Laser-Induced Optoacoustic Spectroscopy

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