Fluorescence characteristics of 5-amino salicylic acid: An iodide recognition study.
Spectrochim Acta A Mol Biomol Spectrosc
; 94: 119-25, 2012 Aug.
Article
em En
| MEDLINE
| ID: mdl-22522294
ABSTRACT
In this paper we report the effect of iodide on the fluorescence of 5-amino salicylic acid (5-ASA). In the absence of iodide, prominent blue green (BG) emission band at â¼465nm (broad) is observed in aprotic solvents whereas violet (V) emission at â¼408nm, blue green (BG) at â¼480nm and green (G) at â¼500nm are observed in case of protic solvents. On the addition of iodide ion (I(-)), the intensity of BG fluorescence is enhanced in case of aprotic solvents. On the other hand the G band is enhanced in protic solvents and decrease in the intensity of the V band is observed. The effect of hydrogen bonding as well as the interplay of neutral and ionic species is invoked to explain the observed results. The study projects the application of this system in iodide recognition in protic/aprotic environments.
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MEDLINE
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Mesalamina
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En
Ano de publicação:
2012
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Article