A dicyanisophorone based fluorescent probe for naked–eye recognition and near–infrared fluorescence detection of palladium
Xinsen He, Qin Yan, Wenjing Zhao, Yi Dong, Youzhe Yang, Bing He, Muhan Lv, Xinyue Hu, Sicheng Liang, Xiaolin Zhong
Abstract
The eco–environmental toxicity of the rare metal palladium (Pd) has received extensive attention, thereby requiring simple and practical methods for detecting Pd. Herein, a new probe ( HPD ) based on dicyanoisophorone dye was designed and synthesized for the detection of Pd. HPD provides several advantages for tracking Pd, including near–infrared (NIR) emission ( λ ex = 670 nm, λ em = 700 nm), naked–eye recognition, and comprehensive detection of 0/2/4 valence Pd with good selectivity and anti–interference. The reaction–sensing mechanism of HPD for Pd was further studied using density functional theory calculations. HPD was demonstrated to be a promising tool for the detection of Pd in real water samples, as well as the imaging of Pd in living cells and animals.