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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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Bibliographic Details
Published in:Journal of fluorescence 2021-03, Vol.31 (2), p.315
Main Authors: Mudi, Naren, Hazra, Paresh, Shyamal, Milan, Maity, Samir, Giri, Prabhat Kumar, Samanta, Shashanka Shekhar, Mandal, Debkumar, Misra, Ajay
Format: Article
Language:English
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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.
ISSN:1573-4994
DOI:10.1007/s10895-020-02664-2