A novel ratiometric fluorescent probe for selective and sensitive detection of Cu2+ in complete aqueous solution

作者：Zhu, Dongjian^*; Ren, Aishan^*; He, Xingcun; Luo, Yanghe; Duan, Zhenhua; Yan, Xiaowei; Xiong, Yuhao; Zhong, Xing^*

来源：Sensors and Actuators B: Chemical , 2017, 252: 134-141.

DOI：10.1016/j.snb.2017.05.141

• Copper ion
• Ratiometric
• Fluorescent probe
• Hemicyanine

A novel hemicyanine-based ratiometric fluorescent probe 3 for Cu2+ was described. The probe exhibited fluorescence emission at 448nm. Upon addition of Cu2+, the emission at 448nm quenched and simultaneously generated a significant bathochromic shift of the emission maximum to 503 nm due to the Cu2+-triggered hydrolysis reaction of the picolinate moiety. Thus, a singl-excitation, dual-emission ratiometric measurement with a large red shift in emission (triangle 55 nm) and remarkable changes in the ratio (F-503nm/F-448nm) of the emission intensity (R/R-o up to 22-fold) could be established. Moreover, the probe exhibited a large Stokes shift, high sensitivity (detection limit of 1.1 nM), and high selectivity for Cu2+ over other metal ions in complete aqueous solution.

• 出版日期2017-11
• 单位贺州学院