Photophysical properties of N-alkylnaphthalimides and analogs

Photophysical studies of 1.8 ( I) and 2.3 ( II) N-butylnaphthalimides were realized. UV/Vis absorption and fluorescence properties for I and II as a function of solvent polarity and proticity show a higher π orbital interaction between the imide and naphthalene rings for I. A comparison with the spe...

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Bibliographic Details
Published in:Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 1993-12, Vol.76 (1), p.55-60
Main Authors: Barros, T.C., Molinari, G.R., Berci Filho, P., Toscano, V.G., Politi, M.J.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Exact sciences and technology
Fluorescence and phosphorescence spectra
Fluorescence and phosphorescence
radiationless transitions, quenching (intersystem crossing, internal conversion)
Molecular properties and interactions with photons
Molecular spectra
Physics
Ultraviolet spectra
Visible spectra
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Summary:Photophysical studies of 1.8 ( I) and 2.3 ( II) N-butylnaphthalimides were realized. UV/Vis absorption and fluorescence properties for I and II as a function of solvent polarity and proticity show a higher π orbital interaction between the imide and naphthalene rings for I. A comparison with the spectral data for their respectives anhydrides, amides and carboxylates corroborates this “pattern”. The distinct electronic energy configuration which arises from 1.8 and 2.3 containing conjugated π electrons on the naphthalene ring, is so dramatic that it governs processes spanning from nanoseconds to seconds.
ISSN:1010-6030
1873-2666
DOI:10.1016/1010-6030(93)80173-7