Molecules | |
A Simple Turn-off Schiff Base Fluorescent Sensor for Copper (II) Ion and Its Application in Water Analysis | |
Carl Redshaw1  Ya-Li Huang2  Xian-Jiong Yang2  Ling-Yi Shen2  Hong Xu3  Xing Zhang3  Qi-Long Zhang3  | |
[1] Department of Chemistry, University of Hull, Cottingham Road, Hull, Yorkshire HU6 7RX, UK;School of Basic Medical Science, Guizhou Medical University, Guiyang 550004, China;The key Laboratory of Environmental Pollution Monitoring and Disease Control, School of Public Health, Ministry of Education, Guizhou Medical University, Guiyang 550004, China; | |
关键词: synthesis; fluorescent probe; copper(II) ion; AIEE; water detection; | |
DOI : 10.3390/molecules26051233 | |
来源: DOAJ |
【 摘 要 】
An aniline-functionalized naphthalene dialdehyde Schiff base fluorescent probe L with aggregation-induced enhanced emission (AIEE) characteristics was synthesized via a simple one-step condensation reaction and exhibited excellent sensitivity and selectivity towards copper(II) ions in aqueous media with a fluorescence “ turn-off ” phenomenon. The detection limit of the probe is 1.64 × 10−8 mol·L−1. Furthermore, according to the results of the UV-vis/fluorescence titrations, Job’s plot method and 1H-NMR titrations, a 1:2 stoichiometry was identified. The binding constant between L and Cu2+ was calculated to be Ka = 1.222 × 103. In addition, the AIEE fluorescent probe L could be applied to detection in real water samples with satisfactory recoveries in the range 99.10–102.90% in lake water and 98.49–102.37% in tap water.
【 授权许可】
Unknown