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Designed Synthesis of Fluorescence 'Turn-on' Dual Sensor for Selective Detection of Al 3+ and Zn 2+ in Water
1-(Pyridin-2-yl-hydrazonomethyl)-naphthalen-2-ol (PNOH) is a naphthalene-based fluorescence dual chemo-sensor for Al and Zn . The probe (PNOH) is spectroscopically characterised and the chemo-sensing mechanism has been demonstrated through H NMR, absorption and both steady state and time resolved fl...
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Published in: | Journal of fluorescence 2021-03, Vol.31 (2), p.315 |
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Main Authors: | , , , , , , , |
Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | 1-(Pyridin-2-yl-hydrazonomethyl)-naphthalen-2-ol (PNOH) is a naphthalene-based fluorescence dual chemo-sensor for Al
and Zn
. The probe (PNOH) is spectroscopically characterised and the chemo-sensing mechanism has been demonstrated through
H NMR, absorption and both steady state and time resolved fluorescence study. The 'turn-on' luminescence property of PNOH is used for the selective detection of trace amount of Al
and Zn
via chelation enhanced fluorescence (CHEF) through complex formation. The 1:1 stoichiometry of each sensor-metal complex is observed from Job's plot based on UV-Vis titration. Most promising advantage of the probe (PNOH) is its application in the one-pot detection of Al
(λem- 460 nm) and Zn
(λ
- 510 nm) exciting at same wavelength (λ
- 420 nm) while high intense emission appears at two different wavelengths. Limit of detection (LOD) of PNOH towards Al
& Zn
are found to be 60 nM & 365 nM respectively. Real water sample analysis has also been demonstrated by using the probe PNOH. |
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ISSN: | 1573-4994 |
DOI: | 10.1007/s10895-020-02664-2 |