A new bis-pyrene derivative as a selective colorimetric and fluorescent chemosensor for cyanide and fluoride and anion-activated CO2 sensing

作者：Lee Minji; Moon Jong Hun; Swamy K M K; Jeong Youngsuk; Kim Gyoungmi; Choi Jiyoung; Lee Jin Yong^*; Yoon Juyoung

来源：Sensors and Actuators B: Chemical , 2014, 199: 369-376.

DOI：10.1016/j.snb.2014.04.005

• Anion recognition
• Cyanide selective chemosensor
• CO2 sensing
• Colorimetric sensor
• Fluorescence sensor

In the present study, we report the solvent controlled selectivity of cyanide. A newly synthesized bis-pyrene derivative 1 exhibited large %26quot;off-on%26quot; fluorescence enhancement with fluoride and cyanide in CH3CN-DMSO (99:1, v/v), which was accompanied by unique colorimetric changes. Likewise, in CH3CN-DMSO-EtOH (98:1:1, v/v) or CH3CN-DMSO-H2O (94:1:5, v/v), selective fluorescence enhancement with cyanide was observed among the various anions, which was attributed to a favourable interaction between the fluoride ion with ethanol or water. The binding modes, UV absorption and fluorescence changes of 1 upon CN- binding are also explained by DFT calculations. Probe 1 was successfully applied for imaging cyanide in the HeLa cells. Finally, anion-activated CO2 sensing via colour and fluorescence changes is demonstrated using chemosensor 1.

• 出版日期2014-8