Photophysics and Photochemistry of Naphthoxazinone Derivatives

Autor:	Alvaro Cañete, Santi Nonell, Nancy Pizarro, Antonio L. Zanocco, Else Lemp, Germán Günther, Lourdes R. Ferreras
Rok vydání:	2008
Předmět:	chemistry.chemical_compound Chemistry Excited state Organic Chemistry Molecule Quantum yield Singlet state Oxazoline Time-resolved spectroscopy Triplet state Photochemistry Product distribution
Zdroj:	JOURNAL OF ORGANIC CHEMISTRY Artículos CONICYT CONICYT Chile instacron:CONICYT
ISSN:	1520-6904 0022-3263
DOI:	10.1021/jo800039r
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98c8db1a70eb4512b13e001e99ba1b38 https://doi.org/10.1021/jo800039r Zobrazit plný text záznamu