Modulation of Fluorescence properties of 5-Aminoquinoline by Ag+ in aqueous media via charge transfer

Cholesteric Molecular Tweezer Artificial Receptor for Rapid and Highly Selective Detection of Ag+ in Food Samples

“…Using ultraviolet spectrophotometry and fluorescence titration, we found that the addition of Ag + could cause regular changes in the UV and fluorescence spectra of molecular tweezer 7a, and the addition of other metal ions had little interference, which indicated that molecular tweezer 7a had high selectivity for Ag + . The binding constant of 7a + Ag + was 1.38 × 10 4 L/mol, and the detection limit was 1 µmol/l, higher than that of many reported methods [32][33][34][35][36]. In the ethanol/Tris solution (v/v = 1/1, pH = 7.0), adding Ag + changed the color of the molecular tweezer 7a solution from colorless to light red, while the color of the solutions with other metal ions added did not change; thus, it was easy for us to realize the rapid naked-eye detection of Ag + .…”

“…According to the formula LOD = 3σ/k [30,31] (k is the slope of the standard curve y = 0.014x + 0.359, and σ is the standard deviation), the limit of detection was calculated to be 1.0 µmol/L, which is superior to most reported probes for detecting Ag + [32][33][34][35][36]; the compared results are presented in Table 3. It is concluded that probe 7a is clearly more sensitive than most of the other sensors for the detection of Ag + [32][33][34][35][36]. Moreover, this detection system for Ag + is visual, rapid and without complicated process and expensive equipment.…”

“…Taking the concentration of Ag + as abscissa and the UV absorbance as ordinate, a straight line was obtained in the linear range of 2 × 10 −6 to 2 × 10 −5 mol/L (Figure 3D), and the linear equation was y = 0.014x + 0.359 (R 2 = 0.991). According to the formula LOD = 3σ/k [30,31] (k is the slope of the standard curve y = 0.014x + 0.359, and σ is the standard deviation), the limit of detection was calculated to be 1.0 μmol/L, which is superior to most reported probes for detecting Ag + [32][33][34][35][36]; the compared results are presented in Table 3. It is concluded that probe 7a is clearly more sensitive than most of the other sensors for the detection of Ag + [32][33][34][35][36].…”

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

“…[6][7][8][9] So silver ions are particularly poisonous to aquatic living things and may gather in the human body via the food consumption. [10][11][12][13] 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.…”

Interaction between Picric Acid and 5-aminoquinoline: A Theoretical Study

“…Numerous photophysical and photochemical studies on aminoquinolines have been carried out in the past few years as these molecules exhibit a wide spectrum of biological and chemical activities [9]. Aminoquinoline derivatives have a significant role in supramolecular chemistry, electron transfer/charge transfer processes, and sensing applications [8].…”