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A Reversible Bis(Salamo)-Based Fluorescence Sensor for Selective Detection of Cd2+ in Water-Containing Systems and Food Samples

School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
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Materials 2018, 11(4), 523; https://doi.org/10.3390/ma11040523
Received: 27 February 2018 / Revised: 22 March 2018 / Accepted: 28 March 2018 / Published: 29 March 2018
A novel, simple, highly selective, and sensitive fluorescence chemosensor for detecting Cd2+ that was constructed from a bis(salamo)-type compound (H4L) with two N2O2 chelating moieties as ionophore was successfully developed. Sensor H4L could show fluorescence turn-on response rapidly and significant selectivity to Cd2+ over many other metallic ions (Cu2+, Ba2+, Ca2+, K+, Cr3+, Mn2+, Sr2+, Co2+, Na+, Li+, Ni2+, Ag+, and Zn2+), and a clear change in color from colorless to yellow that can be very easily observed via the naked eyes in the existence of Cd2+, while other metallic ions do not induce such a change. Interestingly, its fluorescent intensity was increased sharply with the increased concentration of Cd2+. The detection limit of sensor H4L towards Cd2+ was down to 8.61 × 10−7 M. View Full-Text
Keywords: bis(salamo)-type tetraoxime; optical chemosensor; Cd2+; detection; test strips bis(salamo)-type tetraoxime; optical chemosensor; Cd2+; detection; test strips
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Hao, J.; Li, X.-Y.; Zhang, Y.; Dong, W.-K. A Reversible Bis(Salamo)-Based Fluorescence Sensor for Selective Detection of Cd2+ in Water-Containing Systems and Food Samples. Materials 2018, 11, 523.

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