Sensitive and selective detection of cesium via fluorescence quenching

Abstract

Herein we report a robust and easy method for detecting cesium metal ion (Cs + ) in partially aqueous solutions using the fluorescence quenching of 2,4-bis[4-(N,N-dihydroxyethylamino)phenyl]squaraine. This squaraine dye was found to be both highly sensitive (low limits of detection) and selective (limited response to other metals) for cesium ion detection. The detection is likely based on the metal complexing to the dihydroxyethanolamine moieties, which disrupts the donor-acceptor-donor architecture and leads to efficient quenching.

Synthesis of a carbon-dot-based photoluminescent probe for selective and ultrasensitive detection of Hg2+ in water and living cells

“…S4d) representing fluorescence intensity (F 0 /F) versus concentration of Hg 2+ ions could be perfectly described by the Stern-Volmer plot with a linear behaviour, ‫ܨ‬ ‫ܨ‬ ൌ 1.002 1.992ሾ‫݃ܪ‬ ଶା ሿ in the range of 0 to 0.1x10 -6 M, having R 2 =0.996, indicating that the quenching mechanism follows dynamic quenching. 40 This value was entered into the equation (for the Y value), and the corresponding X value was determined. 39 The Stern-Volmer quenching constant was found as 1.99x10 6 mol -1dm 3 .…”

Fluorescence-Based Detection of Benzene, Toluene, Ethylbenzene, Xylene, and Cumene (BTEXC) Compounds in Fuel-Contaminated Snow Environments

“…In particular, fluorescence-based detection in complex environments can occur using a hand-held device while maintaining high sensitivity [16], and can also be performed rapidly to enable high-throughput sample screening [17]. Fluorescence-based detection methods have been reported for a broad variety of analytes using a range of fluorescent sensors, including explosive detection via fluorescent conjugated polymers [18] and nanoparticles [19], anion detection via supramolecular fluorescent sensors [20], and cation detection via interactions of cationic analytes with small-molecule, high-quantum-yield fluorophores [21]. The use of fluorescence-based methods for BTEXC detection in real-world environments has been reported only rarely to date, in combination with capillary electrophoresis [22] or other chromatographic methods to enable separation prior to detection [23].…”

Fluorescence-Based Detection of Benzene, Toluene, Ethylbenzene, Xylene, and Cumene (BTEXC) Compounds in Fuel-Contaminated Snow Environments

“…In particular, fluorescence-based detection in complex environments can occur using a hand-held device while maintaining high sensitivity [16], and can also be performed rapidly to enable high-throughput sample screening [17]. Fluorescence-based detection methods have been reported for a broad variety of analytes using a range of fluorescent sensors, including explosive detection via fluorescent conjugated polymers [18] and nanoparticles [19], anion detection via supramolecular fluorescent sensors [20], and cation detection via www.videleaf.com interactions of cationic analytes with small-molecule, highquantum-yield fluorophores [21]. The use of fluorescence-based methods for BTEXC detection in real-world environments has been reported only rarely to date, in combination with capillary electrophoresis [22] or other chromatographic methods to enable separation prior to detection [23].…”