A new thiosemicarbazone fluorescent probe based on 9,9′-bianthracene for Hg2+ and Ag+

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

“…Likewise, the optimum molar ratios of the probe PCT versus PCT-Al 3 + also was 0.5, which indicated that the stoichiometry for probe PCT and Ag + was 1 : 1. the peak of ESI-MS spectra at m/z 378.0059 corresponding to PCT-Al 3 + was observed in Figure S6. Furthermore, it can be seen in Figure S7 that the correlation constants were evaluated to be 5.416 × 10 4 M À 1 for PCT-Ag + and 3.56 × 10 5 M À 1 for PCT-Al 3 + in CH 3 CH 2 OH/H 2 O (2/8, V/V, pH = 7.4, 50 μM) based on Benesi-Hildebrand equation (1), where K a is the incidence coefficient, F max , F and F min are fluorescence emission intensity in the presentence of metal ion, at a concentration of moderate metal ion, in the presentence of no metal ion respectively. [39] 1…”

“…After adding 1 equivalent amount Ag + , the signals of H 1 and H 8 shifted toward the low-magnetic field own to the local electron cloud density decreased, which were caused by the coordination of S atom and N atom with Ag + , the chelation of PCT and Ag + formed a stable six-membered ring structure. [1,[39][40][41] Similarly, 1 H NMR spectra of PCT and PCT-Al [42][43][44][45] The signals of H 10 split from a single peak into double peaks as a result of the imino N atom coordinated with Al 3 + , which limited the rotation of C=N and the chelation of PCT and Al 3 + forming two stable sixmembered ring structures. [46][47][48] The possible mechanism of sensing Ag + and Al 3 + is described in Scheme 1.…”

“…As important industrial raw materials, silver and aluminum play important roles in the domain of Chlor-alkali industry, catalytic industry, machinery manufacturing industry, metallurgical chemical industry and so on. [1,2] However, along with the development of chemical industry, the pollution of sliver and aluminum has caused many serious threats to public health. Excessive exposure to silver ions can cause blood silver, cardiac hypertrophy, liver degeneration, cardiac enlargement and skin carcinoma.…”

A naphthyl thiourea‐based effective chemosensor for fluorescence detection of Ag+ and Zn2+

“…[1][2][3][4][5] These broad applications increase the amounts of Ag + in environmental systems. [6,7] Therefore, Ag + could cause serious problems for humans. [8] For instance, Ag + can inactivate sulfur-containing enzymes and bind to imidazole, carboxyl, and amine moieties of diverse metabolites.…”

A Pyrazole‐Based Highly Selective Colorimetric Chemosensor for Hg2+ Ion in Semi‐Aqueous Medium

“…Recently, several scientific reports have been made for the detection of Hg 2+ ion and it is interfering with other metal ions or anions . Most of the reported probes are fluorogenic quencher or enhancer within the presence of Hg 2+ .…”