A selective fluorescent sensor for Pb(II) in water

Fluorescent Chemosensor for Detection of PPi Through the Inhibition of Excimer Emission in Water

“…Therefore, the PET process induces quenching in the excimer emission of 1·2Zn. 6,7 In conclusion, we have developed a new fluorescent chemosensor based on the pyrenyl-DPA system which shows the selective quenching effect of excimer emission for PPi relative to other anions through the PET process in water. The quenching effect of the pyrene excimer emission is expected to take place through the PET process from the nitrogen lone pair electrons of the DPA moiety to pyrene.…”

Microfluidic Detection of Multiple Heavy Metal Ions Using Fluorescent Chemosensors

“…Pb sensor 17 and Hg sensor. 18 Many heavy metals are taken into the body as ions or in certain compounds and tend to inhibit the function of particular enzymes.…”

“…To demonstrate the feasibility of this platform, we chose cadmium(Cd), lead(Pb) and mercury(Hg) ions as the target analytes and their respective specific chemosensors [16][17][18] as the detection probes. The microfluidic device was designed to contain three parallel chaotic mixing channels, allowing each chemosensor to be independently mixed with a sample solution.…”

“…1) [16][17][18] were selected for the detection of Cd (pyridin-2-ylmethyl)benzenamine as the Cd 2+ receptor. 16 The emission intensity at 597 nm tends to increase upon the gradual addition of Cd 2+ , which allows for the detection of Cd 2+ by fluorescence methods.…”

“…The Pb sensor is a single agent fluorescent sensor containing four bis(2-pyridylmethyl) amine (Dpa) groups which exhibits a highly selective and sensitive response to lead ions compared to other heavy metal ions at pH 7.0. 17 Its fluorescence intensity at 560 nm is increased by the formation of a complex between Pb 2+ and the chemosensor, which blocks the photo-induced electron transfer. 17 The Hg sensor is a tren-based rhodamine derivative and a new emission band with a peak at 575 nm appears with increasing intensity, upon the addition of increasing concentrations of Hg 2+ ions.…”