Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, Shanghai 201620, China.
Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering & Biotechnology, Donghua University, Shanghai 201620, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2021 Mar 15;249:119283. doi: 10.1016/j.saa.2020.119283. Epub 2020 Dec 3.
Quinoline-based fluorescent chemosensors have been extensively developed for various metal cations, but it was still rare for Pd-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 Pd over other metal cations in aqueous solution. The fluorescence titration revealed a good linear relationship between the fluorescence intensity and the Pd concentration in the range of 0.5-10 μmol L, with the detection limit of 0.26 μmol L (S/N = 3). Fluorescence detection of Pd in practical water sample was also successfully achieved.
基于喹啉的荧光化学传感器已被广泛开发用于检测各种金属阳离子，但对于 Pd 选择性检测仍然很少见。在这项工作中，设计了一种含有一个羧酸基团的新型喹啉-苯并咪唑共轭物（QBM），在水溶液中，QBM 对 Pd 具有高度选择性的荧光猝灭响应，优于其他金属阳离子。荧光滴定表明，荧光强度与 Pd 浓度在 0.5-10 μmol L 范围内呈良好的线性关系，检测限为 0.26 μmol L（S/N = 3）。还成功实现了实际水样中 Pd 的荧光检测。
