Photophysics and photochemistry of naphthoxazinone derivatives

Nonell, S; Ferreras, LR; Cañete Á.; Lemp E.; Gunther, G.; Pizarro N.; Zanocco, AL

Abstract

(Chemical Equation Presented) The photophysics and photochemistry of a series of naphthoxazinones have been studied using a combination of methods ranging from steady-state and time-resolved spectroscopic techniques to product analysis. The photophysics of naphthoxazinone derivatives is very dependent on the structure: phenanthrene-like compounds exhibit higher fluorescence quantum yield than the less aromatic anthracene-like homologous. The latter, exhibit a substantial degree of charge transfer in the excited singlet state. These compounds are fairly photostable in the absence of additives, yielding a single photoproduct arising from the triplet state. The presence of electron donors such as amines increases the photoconsumption quantum yield and changes the product distribution, the primary photoproduct being a dihydronaphthoxazinone that photoreacts further yielding ultimately an oxazoline derivative. © 2008 American Chemical Society.

Más información

Título según WOS: Photophysics and photochemistry of naphthoxazinone derivatives
Título según SCOPUS: Photophysics and photochemistry of naphthoxazinone derivatives
Título de la Revista: JOURNAL OF ORGANIC CHEMISTRY
Volumen: 73
Número: 14
Editorial: American Chemical Society
Fecha de publicación: 2008
Página de inicio: 5371
Página final: 5378
Idioma: English
URL: http://pubs.acs.org/doi/abs/10.1021/jo800039r
DOI:

10.1021/jo800039r

Notas: ISI, SCOPUS