Dual emission and pH based naphthalimide derivative fluorescent sensor for the detection of Bi3+.
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| Title: | Dual emission and pH based naphthalimide derivative fluorescent sensor for the detection of Bi3+. |
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| Authors: | Ramasamy, Kavitha1, Thambusamy, Stalin2 drstalin76@gmail.com |
| Source: | Sensors & Actuators B: Chemical. Aug2017, Vol. 247, p632-640. 9p. |
| Subjects: | Naphthalimides, Fluorescent probes, Metal ions, Bismuth, Chemoreceptors, Stoichiometry, Cyclodextrins |
| Abstract: | This paper describes a novel dual emission N-hydroxy 1,8-naphthalimide (NHN) sensor for selective determination of Bi 3+ ion and pH. This chemosensor displayed a red shift in absorption spectra and fluorescence enhancement towards highly selective Bi 3+ ion in neutral aqueous solution. The binding stoichiometry of NHN with Bi 3+ have been determined to be 1:1 by the job’s plot and the binding constant is calculated by Benesi-Hildebrand relation. The effect of β-cyclodextrin (β-CD) on NHN is also studied at pH ∼ 7. The binding mode of NHN with Bi 3+ through carbonyl and the hydroxyl group of NHN is confirmed by FT-IR spectra. The influence of hydroxyl group in naphthalimide as a function of pH and metal ions was studied by UV–vis and fluorescence spectroscopy. Fluorescence emission of naphthalimide varied in a narrow range of pH (5–9) and was only slightly influenced by the addition of metal ions in aqueous solution. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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