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Photoreduction of oxoisoaporphines by amines: Laser flash and steady-state photolysis, pulse radiolysis, and TD-DFT studies

Authordc.contributor.authorDe la Fuente, Julio 
Authordc.contributor.authorAliaga, Christian 
Authordc.contributor.authorPoblete, Cristian 
Authordc.contributor.authorZapata, Gerald 
Authordc.contributor.authorJullian Matthaei, Carolina 
Authordc.contributor.authorSaitz Barría, Claudio 
Authordc.contributor.authorCañete, Alvaro 
Authordc.contributor.authorKciuk, Gabriel 
Authordc.contributor.authorSobarzo Sánchez, Eduardo 
Authordc.contributor.authorBobrowski, Krzysztof 
Admission datedc.date.accessioned2018-12-20T15:10:07Z
Available datedc.date.available2018-12-20T15:10:07Z
Publication datedc.date.issued2009
Cita de ítemdc.identifier.citationJournal of Physical Chemistry A, Volumen 113, Issue 27, 2018, Pages 7737-7747
Identifierdc.identifier.issn10895639
Identifierdc.identifier.other10.1021/jp901877q
Identifierdc.identifier.urihttp://repositorio.uchile.cl/handle/2250/158153
Abstractdc.description.abstractPhotoreduction of oxoisoaporphine (OIA) (l-aza-benzo-[de]anthracen-7-one) and its 5-methoxy (5-MeOOIA) derivative by selected amines (two non-a-hydrogen-donating amines (l,4-diaza[2.2.2]-bicyclooctane (DABCO) and 2,2,6,6-tetramethylpiperidine (TMP)) and three a-hydrogen-donating amines (triethylamine (TEA), diethylmethylamine (DEMA), and dimethylethylamine (DMEA))) has been studied in deaerated neat acetonitrile solutions using laser flash and steady-state photolysis. The triplet excited states of OIA and 5-MeOOIA are characterized by intense absorption maxima located at λmax = 450 nm and lifetimes of 34.7 ± 0.5 and 44.6 ± 0.4 μs, respectively. In the presence of tertiary amines, both triplets are quenched with a rate constant that varies from the near diffusion limit (>10 9 M-1 s-1) to a rather low value (∼10 7 M-1 s-1) and shows the expected dependence on the reduction potential for one-electron-transfer reactions. The transient absorption spectra observed after quenching of the resp
Lenguagedc.language.isoen
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
Sourcedc.sourceJournal of Physical Chemistry A
Keywordsdc.subjectPhysical and Theoretical Chemistry
Títulodc.titlePhotoreduction of oxoisoaporphines by amines: Laser flash and steady-state photolysis, pulse radiolysis, and TD-DFT studies
Document typedc.typeArtículo de revista
Catalogueruchile.catalogadorSCOPUS
Indexationuchile.indexArtículo de publicación SCOPUS
uchile.cosechauchile.cosechaSI


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Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile