Fluorene-based chemodosimeter for “turn-on” sensing of cyanide by hampering ESIPT and live cell imaging
作者:Manas Kumar Bera、Chanchal Chakraborty、Pradeep Kumar Singh、Chandan Sahu、Kaushik Sen、Samir Maji、Abhijit Kumar Das、Sudip Malik
DOI:10.1039/c4tb00388h
日期:——
A new salicylaldehyde appended fluorene-based chemodosimeter (FSal) has been designed by taking consideration of the special nucleophilicity of cyanide ion. FSal shows selective affinity towards CNâ over other anions (namely Fâ, Brâ, NO3â, ClO4â, N3â, H2PO4â, AcOâ, Iâ, Clâ, and NO2â) through turn-on fluorescence with a minimum detection limit of 0.06 ppm. The turn-on fluorescence of the FSalâCN complex resulting from hampering ESIPT is also supported by DFT and TDDFT calculations. Biological compatibility and live cell imaging of this unique probe have also been explored.
考虑到氰离子的特殊亲核性,我们设计了一种新的水杨醛附加芴基化学计量器(FSal)。与其他阴离子(即 Fâ、Brâ、NO3â、ClO4â、N3â、H2PO4â、AcOâ、Iâ、Clâ 和 NO2â)相比,FSal 通过开启荧光显示出对 CNâ 的选择性亲和力,最低检测限为 0.06 ppm。通过 DFT 和 TDDFT 计算,FSalâCN 复合物因阻碍 ESIPT 而产生的开启荧光也得到了支持。此外,还对这种独特探针的生物兼容性和活细胞成像进行了探索。