荧光
检出限
分子内力
水溶液
聚集诱导发射
化学
滤纸
光化学
分析化学(期刊)
色谱法
光学
立体化学
物理化学
物理
作者
Lijuan Chen,Huie Jiang,Nihao Li,Qingjun Meng,Li Z,Qingxin Han,Xinhua Liu
标识
DOI:10.1016/j.saa.2021.120704
摘要
A Schiff-based aggregation induced emission (AIE) fluorescent probe with excited intramolecular proton transfer (ESIPT) mechanism was synthesized by grafting 2-hydrazinobenzothiazole onto 2,6-diformyl-4-methylphenol. The probe recognizes Zn2+ selectively and sensitively, accompanied by a significant fluorescence emission increasement change from light yellow-green to strong green. Additionally, a stabilization time of at least 30 min was kept in the recognition process. Besides, a linear relationship was observed between the concentration of Zn2+ and the fluorescence intensity at 525 nm (0.05-10 µM). And thus, the probe can detect Zn2+ quantitatively in aqueous solution with a low detection limit of 1.9 × 10-8 M. Based on the AIE property and the selective recognition of Zn2+, SCH was strategically loaded on the filter paper to develop a novel paper-based indicator for on-site and high-efficiency detection of Zn2+. The results showed that the paper-based indicator could be conveniently applied to the visual inspection of Zn2+ as expected and SCH in the paper-based indicators fortunately exhibited a better stability. Furthermore, our comprehensive application evaluations have confirmed that SCH was capable of detecting Zn2+ in real water samples and imaging Zn2+ in living cells roundly.
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