writer：Lei Wang, Xuan-Yu Zheng, Xuan Zhang, Zhi-Jia Zhu
keywords：Fluorescent chemosensor, Pd2+ detection, Quinoline-benzimidazole conjugate
source：期刊
specific source：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Volume 249, 2021, 119283
Issue time：2021年
Quinoline-based fluorescent chemosensors have been extensively developed for various metal cations, but it was still rare for Pd2+-selective detection. In this work, a novel quinoline-benzimidazole conjugate containing one carboxylic acid group (QBM) was designed, and the QBM displayed highly selective fluorescence quenching response towards Pd2+ over other metal cations in aqueous solution. The fluorescence titration revealed a good linear relationship between the fluorescence intensity and the Pd2+ concentration in the range of 0.5–10 μmol L?1, with the detection limit of 0.26 μmol L?1 (S/N = 3). Fluorescence detection of Pd2+ in practical water sample was also successfully achieved.