Colorimetric chemosensor based on coumarin skeleton for selective naked eye detection of cobalt (II) ion in near aqueous medium

A New Fluorescent Chemosensor for Cobalt(II) Ions in Living Cells Based on 1,8-Naphthalimide

“…This is lower than the recommended value for the U.S. (United States Environmental Protection Agency, secondary drinking water regulation) and Australia (National Health and Medical Research Council). Notably, the LOD is quite low as compared to the data reported regarding to other organic chemosensors for sensing of Co 2+ listed in Table 1 [16,17,18,19,20,21,22,23,24,25]. The main analytical characteristics of the proposed chemosensor for the determination of Co 2+ were compared with those of some previously reported fluorescent chemosensors, including coumarin, diethylenetriamine, oxadiazole, dinitrobenzene-2,2-dipycolylamine, carboxamide, pyrimidine–pyridine and pyrazine–rhodamine.…”

“…Due to the limitations of these methods, the development of chemosensors towards Co 2+ ions with high sensitivity and easy operation is still a significant work for researchers. Colorimetric methods for Co 2+ detection which can conveniently and easily monitor target ions with the naked eye have attracted considerable attention [16,17,18,19,20,21,22,23,24,25]. Additionally, a fluorescence probe has also evolved to be a promising candidate for detecting Co 2+ by virtue of its high specificity towards target substances, great simplicity and high-speed analysis during the process of experiments [26,27,28,29].…”

A new phenothiazine‐based fluorescence sensor for imaging Hg2+ in living cells

“…The mixed solution was used as the stock solution for the following experiments. [37][38][39] 2.3 | Synthesis of sensor PHE-ad Compounds 1 and 2 were prepared in accordance with the literature. [40] Weigh out the compound 2 (0.205 g, 1.0 mmol) and ethyl mercaptan (0.248 g, 2.0 mmol) in 20 ml of dichloromethane.…”

Coumarin Grafted Polyethylene Matrix as Colorimetric and Fluorescent Chemosensor for Metal Ions

“…[ 5,6 ] Coumarin based small molecules that are able to function as colorimetric and fluorescent chemosensors for anions and metal ions have been recently reported. [ 7–11 ] The advantages of using coumarin as chromophore are the high photostability, the structural diversity, and the low toxicity of its naturally occurring derivatives. [ 12,13 ]…”