A 2-mercaptobenzimidazole-based emissive Cu(I) complex for selective determination of iodide with large Stokes shift

作者：Singh Amanpreet; Singh Ajnesh; Singh Narinder^*; Jang Doo Ok^*

来源：Sensors and Actuators B: Chemical , 2017, 243: 372-379.

DOI：10.1016/j.snb.2016.11.157

• Fluorescence
• Aggregation-caused quenching
• Iodide recognition
• Water
• Cu(I) complex

A Cu(I) complex of 2-mercaptobenzimidazole (R1) was synthesized and characterized using single-crystal X-ray diffraction. Complex RI showing strong emission at 598 nm serves as a sensor for iodide determination. Upon addition of iodide to a solution of complex RI, a reduction in emission intensity by aggregation-caused quenching (ACQ) was observed, with a large Stokes shift. The limit of detection (LOD) of complex RI was estimated to be 14 +/- 1.5 nM. Complex RI proved to be reusable by extracting the iodide ions with silver nitrate. The advantages of using complex RI as a sensor for iodide include low LOD and emission at long wavelengths, which eliminate the interference caused by short-wavelength emissive impurities.

• 出版日期2017-5