A novel colorimetric chemosensor for the sequential detection of Ni2+ and CN- in aqueous solution

作者：Kang Ji Hye; Lee Seong Youl^*; Ahn Hye Mi; Kim Cheal^*

来源：Sensors and Actuators B: Chemical , 2017, 242: 25-34.

DOI：10.1016/j.snb.2016.11.026

• Nickel
• Cyanide
• Colorimetric
• Sequential detection
• Theoretical calculations

A new colorimetric chemosensor 1 for the sequential detection of Ni2+ and CN- was designed and synthesized. The presence of Ni2+ led to a distinct naked-eye color change from colorless to yellow in a near-perfect aqueous solution. To examine the binding mechanism of 1 with Ni2+,UV3-vis spectroscopy, ESI-mass spectrometry analysis and DFT calculations were conducted. The detection limit of 1 for Ni2+ was down to nanomolar concentration (57 nM). Also, the sensing ability of 1 for Ni2+ was successfully carried out in real water samples (tap, drinking and sewage water). Moreover, the resulting 1-Ni2+ complex acted as an efficient colorimetric chemosensor for CN- via a color change from yellow to colorless. Therefore, chemosensor 1 can be employed as a practical colorimetric chemosensor for detecting of both Ni2+ and CN-.

• 出版日期2017-4