An ultrasensitive colorimetric and fluorescent “turn-on” chemosensor based on Schiff base for the detection of Cu2+ in the aqueous medium

We designed and synthesized a fluorescent “turn-on” and colorimetric chemosensor ((E)-1-((p-tolylimino)methyl)naphthalen-2-ol) SB . The structure of the synthesized chemosensor was investigated by 1 H NMR, FT-IR, and fluorescence spectroscopy, and its sensing properties were studied toward Mn 2+ , C...

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Veröffentlicht in:Environmental monitoring and assessment 2023-06, Vol.195 (6), p.633-633, Article 633
Hauptverfasser: Khan, Sikandar, Muhammad, Mian, Kamran, Abdul Waheed, Al-Saidi, Hamed M., Alharthi, Salman S., Algethami, Jari S.
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Sprache:eng
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Zusammenfassung:We designed and synthesized a fluorescent “turn-on” and colorimetric chemosensor ((E)-1-((p-tolylimino)methyl)naphthalen-2-ol) SB . The structure of the synthesized chemosensor was investigated by 1 H NMR, FT-IR, and fluorescence spectroscopy, and its sensing properties were studied toward Mn 2+ , Cu 2+ , Pb 2+ , Cd 2+ , Na + , Ni 2+ , Al 3+ , K + , Ag + , Zn 2+ , Co 2+ , Cr 3+ , Hg 2+ , Ca 2+ , and Mg 2+ . SB showed an excellent colorimetric (yellow to yellowish brown) in MeOH and fluorescence “turn-on” sensing response to Cu 2+ in MeOH/Water (10/90, v/v) media. The sensing mechanism of SB toward Cu 2+ was investigated by FT-IR, 1 H NMR titration, DFT studies, and Job’s plot analysis. The detection limit was calculated to be very low 0.0025 µg mL −1 (0.0025 ppm). Furthermore, the test strip containing SB also showed excellent selectivity and sensitivity toward Cu 2+ in a solution medium and when supported on a solid medium.
ISSN:0167-6369
1573-2959
DOI:10.1007/s10661-023-11260-3