A Bifunctional “Off‐On” Fluorescence Probe Based on Naphthalene for the Detection of Ag⁺ and Al³⁺ and Its Application in Practical Water Samples, as a Logic gate and as Test Paper

Abstract

A bifunctional fluorescence probe (PCT) based on 2-Hydroxy-1naphthaldehyde and thiosemicarbazide was developed. The probe PCT can selectively detect Ag + and Al 3 + with two clear fluorescence color changes from colorless to yellow and blue violet, respectively. According to the Job's plots and mass spectrum, the binding stoichiometry of the probe PCT with Ag + and Al 3 + was 1 : 1, respectively. Moreover, the detection limit values of PCT for Ag + and Al 3 + in neutral solutions were 1.97 and 1.63 nM and these values were remarkably lower than allowed Ag + and Al 3 + concentrations in potable water determined by the World Health Organization (WHO). The distinct different binding mode were elucidated in this paper. Finally, the probe PCT has been used successfully for the detection of Ag + and Al 3 + in real water samples, logic gate and test paper.

NiS Nanospheres Anchored onto a Graphene Oxide Substrate (NiS@GO) for Efficient Electrochemical Sensing of Trace Amounts of Silver Ions

“…Accordingly, the permitted limit of Ag + in drinking water was set as 0.1 mg L À 1 by World Health Organization (WHO). [9] To meet this requirement, great efforts have been devoted to develop series of efficient methods for monitoring Ag + in the environments, including surface-enhanced Raman scattering, [10] atomic absorption spectrometry, [11] fluorescent spectrometry, [12,13] surface plasmonic resonance spectroscopy, [14] luminescent spectroscopy, [15,16] colorimetric [17,18] and electrochemical analyses. [19,20] Although some analytic results were quite satisfactory, there are still several drawbacks to be settled, such as sophisticated instruments, poor efficiency, complex operations, time-consuming analyses, and so on.…”

A Phenothiazine‐Thiophene‐linked Chalcone as a Highly Sensitive Fluorescent Chemosensor for Ag+ Ions

“…In human body, the silver ion replaces crucial metal ions such as Ca 2+ and Zn 2+ in contact with hydroxyapatite of bone which inturn lead to bone cancer. Therefore, the main tasks of the researchers are to develop a highly selective chemosensor to detect heavy transition metal silver ion back from this dangerous environment [14–16] …”

“…Therefore, the main tasks of the researchers are to develop a highly selective chemosensor to detect heavy transition metal silver ion back from this dangerous environment. [14][15][16] Although several techniques have been utilized for metal quantification they setback in certain aspects such as, highly expensive, time-consuming, and complicated techniques. Therefore, a simple and effective method is required to easily detect the metal ion.…”