ISSN:
1573-4994
Keywords:
Benzanilide
;
fluorescence
;
proton transfer
;
intramolecular charge transfer
;
solid-state fluorescence
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The competitive triple fluorescence of benzanilide is studied by steady-state fluorescence investigations in dependence on the solvent polarity and the para-substitution of the aniline core as well as by comparison with the fluorescence behavior of 4-methoxy-N-methylbenzanilide. The normal fluorescence of benzanilide S1(LE) → S0 appears at λmax = 345 nm, whereas a superposition of proton transfer (PT) fluorescence S1′(PT) → S0′(PT) and intramolecular charge transfer (ICT) flu-orescence S1″(ICT) → S0(FC) is responsible for the long-wavelength fluorescence in the 500-nm region. Different possibilities for the formation of the PT and ICT states are discussed. Investigations of the fluorescence behavior of benzanilides both in solution and as crystals in dependence on the para-substitution of the benzanilide moiety support the PT/ICT model.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1022502526683
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