A colorimetric and fluorometric chemosensor for the selective detection of cyanide ion in both the aqueous and solid phase

作者：Kim Myeong Jin; Manivannan Ramalingam; Kim Ick Jin; Son Young A^*

来源：Sensors and Actuators B: Chemical , 2017, 253: 942-948.

DOI：10.1016/j.snb.2017.07.049

• Colorimetric sensor
• Cyanide recognition
• Solid phase
• Fluorescence

A new colorimetric and fluorometric chemosensor was developed and synthesized that showed both color and fluorescence changes upon the addition of cyanide ion in 80% aq. DMSO solution and in the solid phase. The chemosensor showed a selective and sensitive response to cyanide ion over other common anions such as F-, Cl-, Br-, I-, H2PO4-, NO3- and AcO-. The binding stoichiometry between the receptor and cyanide ions was found to be 1:2 ratio, and the detection of cyanide occurred through deprotonation coupled with intermolecular proton transfer, which was confirmed by a H-1 NMR titration experiment. The detection limit was calculated to be 7.49 nM, which is much lower than the permissible limit set by WHO (1.9 mu M).

• 出版日期2017-12