Development of a new chemosensor for Al3+ ion: Tuning of properties
| Autor: | Sudipto Dey, Ankita Roy, Partha Pratim Roy, Shibashis Halder |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Schiff base
Metal ions in aqueous solution Biophysics Analytical chemistry Quantum yield 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Biochemistry Fluorescence Atomic and Molecular Physics and Optics 0104 chemical sciences Ion Metal chemistry.chemical_compound chemistry visual_art Polar effect visual_art.visual_art_medium Physical chemistry Molecule 0210 nano-technology |
| Zdroj: | Journal of Luminescence. 192:504-512 |
| ISSN: | 0022-2313 |
| DOI: | 10.1016/j.jlumin.2017.07.020 |
| Popis: | We have synthesized and characterized three Schiff-base molecules, namely, 1-(((2-hydroxybenzylidene)hydrazono)methyl)naphthalen-2-ol ( H 2 L ), (1-(((2-hydroxy-5-nitrobenzylidene)hydrazono)methyl)naphthalen-2-ol ( H 2 L-NO 2 ) and 1-(((2-hydroxy-5-methylbenzylidene)hydrazono)methyl)naphthalen-2-ol) ( H 2 L-Me ). Out of these three compounds, H 2 L-NO 2 has been found to be a selective fluorescent chemosensor for Al 3+ . Fluorescence intensity of H 2 L-NO 2 at 517 nm (λ ex = 390 nm) is increased significantly in the presence of Al 3+ . Other relevant metal ions cannot induce considerable enhancement in its emission intensity. The enhancement has been explained using PET and CHEF mechanism. Quantum yield and life-time of H 2 L-NO 2 have increased in the presence of one equivalent of Al 3+ . H 2 L-NO 2 forms 1:1 complex with the metal ion which is confirmed from Job's plot and ESI mass spectral analysis. Its sensitivity has been determined by 3σ method and found to be moderate. Emission intensity of H 2 L and H 2 L-Me does not increase appreciably in the presence of Al 3+ . Presence of electron withdrawing group in H 2 L-NO 2 may be responsible for its aluminum sensing properties. |
| Databáze: | OpenAIRE |
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