Highly selective fluorescent chemosensors for the detection of Hg2+ based on photochromic diarylethenes with a terminal terpyridine unit

ZnO decorated with organic nanoparticles based sensor for the ratiometric selective determination of mercury ions

“…R1 thus formed, was fully characterized using IR, 1 H NMR, and 13 C NMR (ESI, † S1 & S2). The imine linked (-CHQN) stretching frequency band was observed at 1621 cm À1 in the IR spectrum of the receptor (R1).…”

“…11,12 The severe toxicity of mercury ions can be attributed to their easy invasion of the human body through the skin, respiratory system, cell membranes and gastrointestinal tissues, causing neurological disorders such as acrodynia, Hunter-Russell syndrome and Minamata disease. 13,14 Naturally occurring methyl mercury (formed by the biomethylation of mercuric ions in aquatic systems) i.e. the organic form of mercury has been deemed responsible for causing various neurological disorders.…”

A New Dual-response Behavior Chemosensor Based on 2-(1H-dithienobenzoimidazole)-pyridine Unit for Hg2+ Detection

“…Fluorescence spectra were recorded with a Hitachi F-4600 fluorescence spectrophotometer. 1 H NMR and 13 C NMR spectra were recorded on a Bruker AV400 (400 MHz) spectrometer with tetramethylsilane (TMS) as the internal standard. Mass spectra were obtained using an Agilent 1100 ion trap MSD spectrometer.…”

“…Compared to traditional detection methods for Hg 2+ , fluorescence sensors possess many advantages, such as low cost, high selectivity, easy operational techniques, real-time response, and high sensitivity. [10,11] In recent years, a number of high selectivity and sensitivity methods were reported to rapidly monitor Hg 2+ , [12][13][14] and lots of organic chemosensors were developed with receptor chromophore, such as naphthol, [15] BODIPY, [16] quinoline, [ 17] coumarin, [18] rhodamine. [19] Imidazole derivatives plays important roles in optoelectronic applications, such as fluorescent chemosensor, imaging metal ions, [20,21] and a number of chemosensor based on imidazole derivatives such as imidazoquinoxaline, [22] imidazopyrene, [23] and imidazophenazine [24] has been reported.…”

Magnified Fluorescent Aptasensors Based on a Gold Nanoparticle−DNA Hybrid and DNase I for the Cycling Detection of Mercury(II) Ions in Aqueous Solution

“…However, these technologies are very expensive and involve complex sample preparation methods. In addition, some fluorescent chemosensors based on benzothiazole derivatives, , rhodamine, , fluorescein, , and other fluorophores, − have been synthesized and used for detection of Hg 2+ . Nonetheless, most of these sensors have some shortcomings such as cross-sensitivities with other metal ions, fluorescence quenching upon Hg 2+ addition, weak fluorescence intensity, low sensitivity and selectivity, and synthetic difficulty. − Consequently, designing an accurate, rapid, and low response time biosensors for the determination of Hg 2+ has an important theoretical and practical value in the environmental protection and food safety.…”