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

被引：0

作者：

Sikandar Khan

Mian Muhammad

Abdul Waheed Kamran

Hamed M. Al-Saidi

Salman S. Alharthi

Jari S. Algethami

机构：

[1] University of Malakand,Department of Chemistry

[2] University College in Al-Jamoum,Department of Chemistry

[3] Umm Al-Qura University,Department of Chemistry, College of Science

[4] Taif University,Department of Chemistry, College of Science and Arts

[5] Najran University,Promising Centre for Sensors and Electronic Devices (PCSED)

[6] Najran University,undefined

来源：

Environmental Monitoring and Assessment | 2023年 / 195卷

关键词：

Schiff base; UV–Vis spectroscopy; Chemosensor; Colorimetric; H NMR titration;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

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 1H NMR, FT-IR, and fluorescence spectroscopy, and its sensing properties were studied toward Mn2+, Cu2+, Pb2+, Cd2+, Na+, Ni2+, Al3+, K+, Ag+, Zn2+, Co2+, Cr3+, Hg2+, Ca2+, and Mg2+. SB showed an excellent colorimetric (yellow to yellowish brown) in MeOH and fluorescence “turn-on” sensing response to Cu2+ in MeOH/Water (10/90, v/v) media. The sensing mechanism of SB toward Cu2+ was investigated by FT-IR, 1H 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 Cu2+ in a solution medium and when supported on a solid medium.

引用

共 54 条

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