A novel conjugated polymer fluorescence probe for the detection of copper ions in aqueous media
Lindan Gong, Lixiao Zhang, Rui Shen, Lin Zhang, Hengyuan Wang, Lu-An Fan
Abstract
Abstract A novel ionic conjugated polymer fluorescent probe ( IP ) containing fluorenyls and imines was synthesized through a simple condensation method for the rapid detection of Cu 2+ . The probe exhibited a selective quenching response toward Cu 2+ over other common metal ions in phosphate-buffered saline (PBS) at a pH of 7. Moreover, the fluorescence intensity of IP was linearly proportional to the concentration of Cu 2+ when it ranged from 1 to 10 μ M, and the limit of detection for Cu 2+ was 0.45 μ M. Furthermore, the quenched fluorescence of IP by Cu 2+ was recovered after adding amino acids or ethylenediaminetetraacetic acid (EDTA), indicating that the probe could be recycled and is promising to reduce the detection cost of Cu 2+ in real samples.