A new highly selective and turn-on fluorescence probe for detection of cyanide

作者：Yang Yutao; Yin Caixia^*; Huo Fangjun; Chao Jianbin; Zhang Yongbin; Cheng Fangqin

来源：Sensors and Actuators B: Chemical , 2014, 193: 220-224.

DOI：10.1016/j.snb.2013.11.094

• Cyanide
• Nucleophilic
• Fluorescent probe
• Sensitively
• Selectively

A new compound was conveniently synthesized via the condensation of 2-hydroxy-1,3,5-benzenetricarbaldehyde (1) with 1-methyl-2,3,3-trimethyl-3H-indolium (2) in ethanol. Its recognition ability was firstly carried out in DMSO. After addition of all kinds of anions, only CN- can induce a turn on fluorescence accompanying a blue-green fluorescence color. The mechanism is based on nucleophilic addition reaction of cyanide anion with the polarized C=N bond of the indolium group blocking the pi-conjugation between indolium and 2-hydroxy-1,3,5-benzenetricarbaldehyde, which was proved by H NMR and ESI-MS. In addition, the detection was completed with 2 min and the detection limit was found to be 45 nmol/L.

• 出版日期2014-3
• 单位中国科学院长春应用化学研究所; 山西大学