A reversible and highly selective fluorescent probe for monitoring Hg2+ and iodide in aqueous solution

作者：Liu Jun; Lin Qi; Zhang You Ming; Wei Tai Bao^*

来源：Sensors and Actuators B: Chemical , 2014, 196: 619-623.

DOI：10.1016/j.snb.2014.02.062

• Fluorescence probe
• Relay recognition
• " Off-on-off" switching
• Aqueous solution

To realize highly selective relay recognition of Hg2+ and I- ions, a simple 1, 4-bis (2-benzimidazolyl) benzene (L) was designed and synthesized. Sensor L displays rapid, highly selective and sensitive recognition to Hg2+ in H2O/C2H5 OH (9:1, v/v) solution. Furthermore, in the situ generated L-Hg2+ ensemble could recover the quenched fluorescence upon the addition of iodide anion resulting in an OFF-ON-OFF type sensing with a detection limit of 1.0 x 10(-9) mol/L in the same medium. Notably, the sensor was retrievable to indicate iodide anions with Hg2+, and I-, in turn, increased. This successive recognition feature of sensor L makes it has a potential utility for Hg2+ and I- anion detection in aqueous solution.

• 出版日期2014-6
• 单位西北师范大学